1.2.0

Compiler

• Fix variance checks between generic instances for Proc#call and abstract defs. (#10899, thanks @HertzDevil)
• Fix proc_spec forcing normal compilation instead of JIT (#10964, thanks @straight-shoota)
• Fix ProcNotation#to_s remove whitespace for nil output type (#10935, thanks @straight-shoota)
• Compiler: carry FileModule information inside Block (#11039, thanks @asterite)
• Splat values correctly inside return/break/next statements (#10193, thanks @HertzDevil)
• Handle already stripped column numbers in compiler exceptions (#11008, thanks @pyrsmk)
• Substitute unbound type parameters in virtual metaclass types (#11067, thanks @HertzDevil)
• Improve detection of instance variables in extended modules (#10554, thanks @HertzDevil)
• Don't compute instance variable initializers on unbound generic instances (#11000, thanks @HertzDevil)
• Syntax errors for invalid 128-bit integer literals (#10975, thanks @rymiel)
• Support auto-splatting in captured block literals (#10251, thanks @HertzDevil)
• Detect cyclic includes between generic modules (#10529, thanks @HertzDevil)
• Add stricter checks for arguments to macro methods on AST nodes (#10498, thanks @HertzDevil)
• Compiler: fix is_a? for virtual metaclass types (#11121, thanks @asterite)
• Fix edge cases with unicode method names (#10978, thanks @HertzDevil)
• Don't emit debug info for unused variable declarations (#10957, thanks @HertzDevil)
• Fix Call.def_full_name print full block parameter (#10915, thanks @straight-shoota)
• Allow union types to be unbound (#11166, thanks @HertzDevil)
• Make typeof start a nested lexical scope (#10796, thanks @HertzDevil)
• Fix edge case for intersection between virtual metaclasses (#11185, thanks @HertzDevil)
• Compiler: don't trigger "already had enclosing call" for same object (#11202, thanks @asterite)
• Properly handle indirect arguments for external C functions (#11189, thanks @ggiraldez)
• Fix resolve generic argument in block output type restriction mismatch (#11186, thanks @straight-shoota)
• Secure array slicing when expanding macro for stack trace (#11109, thanks @pyrsmk)
• Fix debug locations for Proc pointers (#11243, thanks @HertzDevil)
• Allow assignments from generic instance metaclasses to virtual metaclasses (#11250, thanks @HertzDevil)
• Refactor CrystalPath#find_in_path_relative_to_dir for readability (#10876, #10990, #10988, thanks @straight-shoota)
• Allow constants and instance / class variables as receivers for setter proc pointers (#10741, thanks @HertzDevil)
• Do not use globals for regex (#10951, thanks @asterite)
• Define type filtering through an intersection operation (#10781, thanks @HertzDevil)
• Fix no overflow check when primitive int converts to same type (#11003, thanks @HertzDevil)
• Attach debug locations to generated internal LLVM functions (#10934, thanks @HertzDevil)
• Add helpful error message for invalid number literal like '.42' (#4665, thanks @makenowjust)
• Add CrystalPath.expand_paths, expand relative to compiler path (#11030, thanks @straight-shoota)
• Clarify usage of "arguments" and "parameters" in error messages (#10378, thanks @HertzDevil)
• (performance) Don't generate type IDs for formal generic instances (#11167, thanks @HertzDevil)
• (performance) Don't generate unique type IDs for virtual metaclasses (#11188, thanks @HertzDevil)
• Add an environment variable for dumping type IDs (#11168, thanks @HertzDevil)
• Allow underscores in macro for's loop variables (#11141, thanks @HertzDevil)
• (performance) Compiler: cache cleanup transformer (#11197, thanks @asterite)
• Avoid needless union in LLVM::ABI::AArch64#homogeneous_aggregate? (#11199, thanks @asterite)
• Removing ThinLTO support (#11194, thanks @beta-ziliani)
• Error if abstract def implementation is inherited from supertype (#11056, thanks @straight-shoota)
• (performance) Add inject_primitives: false to macro_spec (#11269, thanks @straight-shoota)
• Primitive annotations for interpreter (#11147, thanks @asterite)
• Support generic module instances in TypeNode#includers (#11116, thanks @HertzDevil)
• Reject hash literals with mixed syntax (#11154, thanks @makenowjust)

Language

• Make .as?(NoReturn) always return nil (#10896, thanks @HertzDevil)
• Compiler: make is_a?(union) work correctly for virtual types (#11176, thanks @asterite)
• Adjust docs for Crystal::Macros::HashLiteral#[] (#10930, thanks @kevinsjoberg)
• Fix path lookup when ancestor finds type with same name as current scope (#10901, thanks @HertzDevil)
• Fix several compile-time operations on generic instance metaclasses (#11101, thanks @HertzDevil)
• Make #is_a? in macros respect the AST node hierarchy (#11062, thanks @HertzDevil)
• Add docs to string methods in SymbolLiteral and MacroId (#9298, thanks @makenowjust)
• Add clarification about when instance_vars can be called (#11171, thanks @willhbr)
• Add file_exists? macro method (#10540, thanks @Sija)

Standard Library

• (breaking-change) Change nonsense return types to Nil: uncategorized (#10625, thanks @oprypin)
• (breaking-change) Change nonsense return types to Nil in formatter classes (#10623, thanks @oprypin)
• Add base64 to prelude (#11050, thanks @straight-shoota)
• Remove calls to deprecated SystemError.from_winerror (#11220, thanks @straight-shoota)
• Add support for LLVM 12 (#10873, #11178, thanks @maxfierke, @Blacksmoke16)
• Examples: fix (2021-09) (#11234, thanks @maiha)
• Don't use :nodoc: when overriding public methods (#11096, thanks @HertzDevil)
• Add internal registry implementation for win32 (#11137, thanks @straight-shoota)

Collection

• (breaking-change) Move Array#product to Indexable#cartesian_product (#10013, thanks @HertzDevil)
• Disallow Slice(T).new(Int) where T is a union of primitive number types (#10982, thanks @HertzDevil)
• Make Array#transpose, Enumerable#reject, Enumerable#to_h work with tuples (#10445, thanks @HertzDevil)
• Fix Enumerable#each block return type (#10928, thanks @straight-shoota)
• Fix key type f...

1.1.1

Language changes

• Revert name of top-level module to main (#10993, thanks @beta-ziliani)

Standard Library

• Fix missing required args for Socket::Addrinfo::Error.new (#10960, thanks @straight-shoota)
• Fix disable unnecessary spec on win32 (#10971, thanks @straight-shoota)
• Remove incorrect type restrictions on index methods with offset (#10972, thanks @straight-shoota)
• Fix: documentation of #step in Number and Char (#10966, #11006, thanks @beta-ziliani and @straight-shoota)

Compiler

• Fix parsing macro body with escaped backslash in literal (#10995, thanks @straight-shoota)

Other

• Updating aarch64 actions to use 1.0.0 images (#10976, thanks @beta-ziliani)

1.1.0

1.1.0 (2021-07-14)

Language changes

• Support splat expansions inside tuple and array literals. (#10429, thanks @HertzDevil)
• Support breaks with values inside while expressions. (#10566, thanks @HertzDevil)

Macros

• Add @top_level to access the top-level scope in macros. (#10682, thanks @beta-ziliani)
• Fix: preserve integer sizes in NumberLiteral#int_bin_op. (#10713, thanks @collidedscope)
• Add NumberLiteral#to_number. (#10802, thanks @straight-shoota)
• (breaking-change) Add Crystal::Macros::Path#global? deprecating the old Crystal::Macros::Path#global. (#10812, thanks @HertzDevil)
• Minor fixes to docs of UnaryExpression macro nodes. (#10816, thanks @HertzDevil)
• Add macro method ASTNode#nil?. (#10850, #10616, thanks @straight-shoota)

Standard library

Global changes

Windows support

• Port Socket::Address to win32 . (#10610, thanks @straight-shoota)
• Port Socket::Addrinfo to win32. (#10650, thanks @straight-shoota)
• Extract system-specifics from Socket. (#10706, thanks @straight-shoota)
• Make WinError portable and add it to prelude. (#10725, thanks @straight-shoota)
• Improve portability of SystemError. (#10726, thanks @straight-shoota)
• Refactor Socket::Addrinfo::Error based on os_error . (#10761, thanks @straight-shoota)
• Add WinError.wsa_value and specs for WinError. (#10762, thanks @straight-shoota)
• Add specs for Errno. (#10763, thanks @straight-shoota)
• Refactor: Move win32 libc bindings from winbase.cr to approriate files. (#10771, thanks @straight-shoota)
• Refactor: Change protocol socket fd to Socket::Handle. (#10772, thanks @straight-shoota)
• Fix Socket::Connect error in addrinfo inherit os_error. (#10782, thanks @straight-shoota)
• Reorganize some win32 libc bindings (#10776, thanks @straight-shoota)

Type annotations

• Add type restriction to private Process constructor. (#7040, thanks @z64)
• Add various return type restrictions (thanks @oprypin, @straight-shoota, and @caspiano):
  #10578, #10579,
  #10580, #10581,
  #10582, #10583,
  #10584, #10585,
  #10586, #10587,
  #10588, #10849,
  #10856, #10857,
  #10858, #10905
• Add type restrictions for splat-less overloads of some methods. (#10594, thanks @HertzDevil)

Numeric

• Add Number.new overload for String. (#10422, thanks @Blacksmoke16)
• Fix Math.pw2ceil for zero and 64-bit integers. (#10555, thanks @straight-shoota)
• Add #positive? & #negative? to Number and Time::Span. (#10601, thanks @Blacksmoke16)
• Fix imprecise Number#significant algorithm. (#10615, thanks @straight-shoota)
• Add BigFloat's rounding modes. (#10618, thanks @HertzDevil)
• Fix handling of arithmetic overflow in BigDecimal#div. (#10628, thanks @kellydanma)
• Clarify behaviour of unsafe Float-to-number conversions. (#10631, thanks @HertzDevil)
• Fix return type restriction for Number#humanize overload. (#10633, thanks @HertzDevil)
• Fix printf float with with many digits. (#10719, thanks @straight-shoota)
• Add BigDecimal's missing rounding modes. (#10798, thanks @HertzDevil)
• Add support for using big rational #** with unsigned ints. (#10887, thanks @stakach)
• Add overflow detection to BigFloat#to_i64 and #to_u64. (#10630, thanks @HertzDevil)

Text

• (performance) Optimize Levenshtein.distance. (#8324, thanks @r00ster91)
• Refactor: add private Slice#hexdump(io : IO) overload. (#10496, thanks @HertzDevil)
• Restrict MatchData#begin and #end to Int32. (#10656, thanks @straight-shoota)
• Refactor: remove #check_needs_resize from IO::Memory, String::Builder. (#10732, thanks @straight-shoota)
• Fix Base64#encode, exclude last 3 bytes from bswap. (#10752, thanks @kostya)
• Refactor: avoid union type in Char::Reader#decode_char_at. (#10758, thanks @asterite)

Collections

• Add sub/superset checking methods to Hash. (#7500, thanks @Sija)
• Improve documentation of Array#[](Range). (#10243, thanks @straight-shoota)
• Add Steppable module as generalized Number#step. (#10279, thanks @straight-shoota)
• Add docs for #map_with_index. (#10512, thanks @wontruefree)
• Add Array#truncate. (#10712, thanks @HertzDevil)
• Fix: Always copy Hash's default block on #dup and #clone. (#10744, thanks @HertzDevil)
• Apply Array#push's resizing heuristic to #unshift. (#10750, thanks @HertzDevil)
• Refactor index / count normalization in range-like methods. (#10753, thanks @HertzDevil)
• Add methods for cumulative folding and prefix sums. (#10789, thanks @HertzDevil)
• Fix: Pass read-only flag to peeked slice in IO::Memory. (#10891, thanks @z64)

Crypto

• Add methods for getting peer certificates and signatures in OpenSSL. (#8005, thanks @will)
• Add docs for OpenSSL::Cipher. (#9934, thanks @sol-vin)
• Fix format of src/openssl/cipher.cr. (#10705, thanks @straight-shoota)
• Refine documentation for Random#urlsafe_base64. (#10724, thanks @straight-shoota)
• Fix ssl context required for add_x509_verify_flags. (#10756, thanks @stakach)

Time

• Improve error handling for load_localtime on unix. (#10654, thanks @straight-shoota)
• Fix broken call to Time#to_s. (#10778, thanks @straight-shoota)
• Fix Time#shift cover date boundaries with zone offset. (#10871, thanks @straight-shoota)

Files

• Fix and unify documentation for puts. (#10614, thanks @straight-shoota)
• Fix Path#sibling return type. (#10655, thanks @Sija)
• Add Path in FileUtils's methods to match the interfaces it's wrapping. (#10747, thanks @yb66)
• Fix FileDescriptor#pos return Int64 on armv6 ([#10845](https://github.com/crystal-l...

1.0.0

Language changes

• Support Tuple#[](Range) with compile-time range literals. (#10379, thanks @HertzDevil)

Macros

• Don't use named argument key names as parameters for method_missing calls. (#10388, thanks @HertzDevil)

Standard library

• (breaking-change) Drop deprecated definitions. (#10386, thanks @bcardiff)
• Fix example codes in multiple places. (#10505, thanks @maiha)

Macros

• (breaking-change) Always add explicit return types in getter/property macros. (#10405, thanks @Sija)

Numeric

• (breaking-change) Change default rounding mode to TIES_EVEN. (#10508, thanks @straight-shoota)
• Fix downcasting float infinity. (#10420, thanks @straight-shoota)
• Fix String#to_f out of range behaviour. (#10425, thanks @straight-shoota)
• Implement rounding mode for Number#round. (#10413, #10360, #10479, thanks @straight-shoota)

Text

• Add missing unicode whitespace support to String methods. (#10367, thanks @straight-shoota)

Collections

• Fix Range#== to ignore generic type arguments. (#10309, thanks @straight-shoota)
• Make Enumerable#flat_map, Iterator#flat_map work with mixed element types. (#10329, thanks @HertzDevil)
• Remove duplicated sort related specs. (#10208, thanks @makenowjust)
• Fix docs regarding Set#each return type. (#10477, thanks @kachick)
• Fix docs examples regarding Set#*set_of?. (#10285, thanks @oddp)
• Fix expectation on set specs. (#10482, thanks @kachick)

Serialization

• (breaking-change) Serialize Enum to underscored String by default. (#10431, thanks @straight-shoota, @caspiano)
• (breaking-change) Use class instead of struct for types in XML module. (#10436, thanks @hugopl)
• Add YAML::Nodes::Node#kind. (#10432, thanks @straight-shoota)

Files

• Let IO::Memory not be writable with read-only Slice. (#10391, thanks @straight-shoota)
• Allow Int64 values within IO#read_at. (#10356, thanks @Blacksmoke16)
• Add IO::Sized#remaining=(value) to reuse an existing instance. (#10520, thanks @jgaskins)

Networking

• (security) Remove Cookie Name Decoding. (#10442, thanks @security-curious)
• (breaking-change) Remove implicit en-/decoding for cookie values. (#10485, thanks @straight-shoota)
• (breaking-change) Split HTTP::Cookies.from_headers into separate methods for server/client. (#10486, thanks @straight-shoota)
• (performance) Minor performance improvements to HTTP::Cookies. (#10488, thanks @straight-shoota)
• Respect subclasses when constructing HTTP::Client from class methods. (#10375, thanks @oprypin)
• Make the content-length header more RFC compliant. (#10353, thanks @Blacksmoke16)
• Fix #respond_with_status when headers written or closed. (#10415, thanks @straight-shoota)
• Fix Cookie#== to take all ivars into account. (#10487, thanks @straight-shoota)
• Remove implicit path=/ from HTTP::Cookie. (#10491, thanks @straight-shoota)
• Add HTTP::Request#local_address. (#10385, thanks @carlhoerberg)

Logging

• Close AsyncDispatcher on #finalize. (#10390, thanks @straight-shoota)

System

• Fix Process.parse_argument behavior against a quote in a word. (#10337, thanks @makenowjust)
• Add aarch64 support for macOS/darwin targets. (#10348, thanks @maxfierke, @RomainFranceschini)
• Add LibC::MAP_ANONYMOUS to x86_64-darwin to match other platforms. (#10398, thanks @sourgrasses)

Runtime

• Improve error message for ELF reader on uninitialized runtime. (#10282, thanks @straight-shoota)

Compiler

• (breaking-change) Disallow surrogate halves in escape sequences of string and character literals, use \x for arbitrary binary values. (#10443, thanks @HertzDevil)
• Fix ICE when exhaustive in-clause calls pseudo-method. (#10382, thanks @HertzDevil)
• Fix ICE when parsing foo.% calls. (#10351, thanks @makenowjust)
• Fix edge cases for symbol quoting rules. (#10389, thanks @HertzDevil)
• Support closured vars inside Const initializer. (#10478, thanks @RX14)
• Documentation grammar fix. (#10369, thanks @szTheory)

Language semantics

• Don't fail on untyped is_a?. (#10320, thanks @asterite)
• Fix named arguments in super and previous_def calls. (#10400, thanks @HertzDevil)
• Fix assignments in array literals. (#10009, thanks @straight-shoota)
• Consider type var splats in generic type restrictions. (#10168, thanks @HertzDevil)
• Align Proc.new(&block)'s behaviour with other captured blocks. (#10263, thanks @HertzDevil)
• Don't merge NamedTuple metaclasses through instance types. (#10501, thanks @HertzDevil)
• Access instantiations of NamedTuple and other generics uniformly. (#10401, thanks @HertzDevil)
• Improve error message for auto-cast error at Var assign. (#10327, thanks @straight-shoota)
• Exclude abstract defs from "no overload matches" errors. (#10483, thanks @HertzDevil)
• Support splats inside tuple literals in type names. (#10430, thanks @HertzDevil)
• Accept pointer instance types on falsey conditional branches. (#10464, thanks @HertzDevil)
• Match named arguments by external parameter names when checking overload cover. (#10530, thanks @HertzDevil)

Doc generator

• Detect source locations in more situations. (#10439, thanks @oprypin)

Others

• CI improvements and housekeeping. (#10299, #10340, #10476, #10480, thanks @bcardiff, @Sija, @straight-shoota)
• Update distribution-scripts to use Shards v0.14.1. (#10494, thanks @bcardiff)
• Add GitHub issue templates. (#8934, thanks @j8r)
• Add LLVM 11.1 to the list of supported versions. (#10523, thanks @Sija)
• Fix SDL examples crashes. (#10470, thanks @megatux)

0.36.1

Standard library

• Fix Enum.from_value? for flag enum with non Int32 base type. (#10303, thanks @straight-shoota)

Text

• Don't raise on String.new with null pointer and bytesize 0. (#10308, thanks @asterite)

Collections

• Explicitly return a Hash in Hash#dup and Hash#clone (reverts #9871). (#10331, thanks @straight-shoota)

Serialization

• XML: fix deprecation warning. (#10335, thanks @bcardiff)

Runtime

• Eager load DWARF only if CRYSTAL_LOAD_DWARF=1. (#10326, thanks @bcardiff)

Compiler

• (performance) Initialize right-away constants in a separate function. (#10334, thanks @asterite)
• Fix incorrect casting between different union types. (#10333, thanks @asterite)
• Fix a formatting error in the "missing argument" error. (#10325, thanks @BlobCodes)
• Fix while condition assignment check for Not. (#10347, thanks @asterite)
• Allow operators and setters-like macros names back. (#10338, thanks @asterite)

Language semantics

• Fix type check not considering virtual types. (#10304, thanks @asterite)
• Use path lookup when looking up type for auto-cast match. (#10318, thanks @asterite)

0.36.0

Language changes

• (breaking-change) Reject annotations on ivars defined in base class. (#9502, thanks @waj)
• (breaking-change) Make ** be right associative. (#9684, thanks @asterite)

Macros

• (breaking-change) Deprecate TypeNode#has_attribute? in favor of #annotation. (#9950, thanks @HertzDevil)
• Support heredoc literal in macro. (#9467, thanks @makenowjust)
• Support %Q, %i, %w, and %x literals in macros. (#9811, thanks @toddsundsted)
• Allow executing multi-assignments in macros. (#9440, thanks @makenowjust)

Standard library

• (breaking-change) Drop deprecated CRC32, Adler32 top-level. (#9530, thanks @bcardiff)
• (breaking-change) Drop deprecated Flate, Gzip, Zip, Zlib top-level. (#9529, thanks @bcardiff)
• (breaking-change) Drop deprecated with_color top-level method. (#9531, thanks @bcardiff)
• (breaking-change) Make SemanticVersion parsing more strict. (#9868, thanks @hugopl)
• Respect explicitly provided type vars for Tuple.new and NamedTuple.new. (#10047, thanks @HertzDevil)
• Fix OptionParser to handle sub-commands with hyphen. (#9465, thanks @erdnaxeli)
• Fix OptionParser to not call handler if value is given to none value handler. (#9603, thanks @makenowjust)
• Make def_equals compare first by reference. (#9650, thanks @waj)
• Remove unnecessary def ==(other) fallbacks. (#9571, thanks @makenowjust)
• Fix OptionParser indentation of option descriptions. (#10183, thanks @wonderix)
• Add #hash to Log::Metadata, Path, SemanticVersion, Socket::Address, URI::Params, and UUID. (#10119, thanks @straight-shoota)
• Refactor several case statements with exhaustive case/in. (#9656, thanks @Sija)
• Remove Kernel mentions in docs. (#9549, thanks @toddsundsted)
• Improve docs for Object#dup. (#10053, thanks @straight-shoota)
• Fix example codes in multiple places. (#9818, thanks @maiha)
• Fix typos, misspelling and styling. (#9636, #9638, #9561, #9786, #9840, #9844, #9854, #9869, #10068, #10123, #10102, #10116, #10229, #10252, thanks @kubo, @m-o-e, @mgomes, @philipp-classen, @dukeraphaelng, @camreeves, @docelic, @ilmanzo, @Sija, @pxeger, @oprypin)

Macros

• Fix documentation for #[]= macro methods. (#10025, thanks @HertzDevil)

Numeric

• (breaking-change) Move Complex#exp, Complex#log, etc. to Math.exp, Math.log overloads. (#9739, thanks @cristian-lsdb)
• (performance) Use unchecked arithmetics in Int#times. (#9511, thanks @waj)
• Check for overflow when extending signed integers to unsigned integers. (#10000, thanks @HertzDevil)
• Fix sprintf for zero left padding a negative number. (#9725, thanks @asterite)
• Fix BigInt#to_64 and BigInt#hash. (#10121, thanks @oprypin)
• Fix BigDecimal#to_s for numbers between -1 and 0. (#9897, thanks @dukeraphaelng)
• Fix Number#step. (#10130, #10295, thanks @straight-shoota, @bcardiff)
• Make Complex unary plus returns self. (#9719, thanks @asterite)
• Improve Int#lcm and Int#gcd. (#9999, thanks @HertzDevil)
• Add Math::TAU. (#10179, thanks @j8r)
• Add wrapped unary negation to unsigned integer types to allow &- x expressions. (#9947, thanks @HertzDevil)
• Improve documentation of mathematical functions. (#9994, thanks @HertzDevil)

Text

• (breaking-change) Fix String#index not working well for broken UTF-8 sequences. (#9713, thanks @asterite)
• (performance) String: Don't materialize Regex match[0] if not needed. (#9615, thanks @asterite)
• Fix String#rindex default offset for matching empty regex correctly. (#9690, thanks @makenowjust)
• Add various String#delete_at methods. (#9398, thanks @asterite)
• Raise if passing null Pointer to String. (#9653, thanks @jgaskins)
• Add Regex#capture_count. (#9746, thanks @Sija)
• Add Regex::MatchData#[] overloading to Range. (#10076, thanks @makenowjust)
• Fix duplicates in String documentation. (#9987, thanks @Nicolab)
• Add docs for substitution to Kernel.sprintf. (#10227, thanks @straight-shoota)

Collections

• (breaking-change) Make Hash#reject!, Hash#select!, and Hash#compact! consistent with Array and return self. (#9904, thanks @caspiano)
• (breaking-change) Deprecate Hash#delete_if in favor of Hash#reject!, add Dequeue#reject! and Dequeue#select!. (#9878, thanks @caspiano)
• (breaking-change) Change Set#delete to return Bool. (#9590, thanks @j8r)
• (breaking-change) Drop deprecated Enumerable#grep. (#9711, thanks @j8r)
• (breaking-change) Remove Hash#key_index . (#10016, thanks @asterite)
• (breaking-change) Deprecate StaticArray#[]=(value) in favor of StaticArray#fill. (#10027, thanks @HertzDevil)
• (breaking-change) Rename Set#{sub,super}set? to {sub,super}set_of?. (#10187, thanks @straight-shoota)
• (performance) Optimize Array#shift and Array#unshift. (#10081, thanks @asterite)
• (performance) Array#rotate optimization for small arrays. (#8516, thanks @wontruefree)
• Fix Hash#dup and Hash#clone to return correct type for subclasses. (#9871, thanks @vlazar)
• Fix Iterator#cons_pair return type. (#9788, thanks @asterite)
• Fix key type restriction of Hash#merge block. (#9495, thanks @makenowjust)
• Fix Range#step. (#10203, thanks @straight-shoota)
• Let Range#step delegate to begin.step and allow float based ranges to be stepped. (#10209, thanks @straight-shoota)
• Fix Indexable#join with IO. (#10152, thanks @straight-shoota)
• Fix Flatten for value-type iterators. (#10096, thanks @f-fr)
• Fix Indexable.range_to_index_and_count to not raise IndexError. (#10191, thanks @straight-shoota)
• Handle recursive structures in def_clone, Hash, Array, Dequeue. (#9800, thanks @asterite)
• Add BitArray#dup. ([#9550](#9550...

0.35.1

Standard library

Collections

• Remove Hash#each type restriction to allow working with splats. (#9456, thanks @bcardiff)

Networking

• Revert IO#write changes in 0.35.0 and let it return Nil. (#9469, thanks @bcardiff)
• Avoid leaking logging context in HTTP request handlers. (#9494, thanks @Blacksmoke16)

Crypto

• Use less strict cipher compatibility for OpenSSL client context. (#9459, thanks @straight-shoota)
• Fix Digest::Base block argument type restrictions. (#9500, thanks @straight-shoota)

Logging

• Fix Log.context.set docs for hash based data. (#9470, thanks @bcardiff)

Compiler

• Show warnings even if there are errors. (#9461, thanks @asterite)
• Fix parsing of {foo: X, typeof: Y} type. (#9453, thanks @makenowjust)
• Fix parsing of proc in hash of key type. (#9458, thanks @makenowjust)
• Revert debug level information changes in specs to fix 32 bits builds. (#9466, thanks @bcardiff)

Others

• CI improvements and housekeeping. (#9455, thanks @bcardiff)
• Code formatting. (#9482, thanks @makenowjust)

0.35.0

Language changes

• (breaking-change) Let case when be non-exhaustive, introduce case in as exhaustive. (#9258, #9045, thanks @asterite)
• Allow ->@ivar.foo and ->@@cvar.foo expressions. (#9268, thanks @makenowjust)

Macros

• Allow executing OpAssign (+=, ||=, etc.) inside macros. (#9409, thanks @asterite)

Standard library

• (breaking-change) Refactor to standardize on first argument for methods receiving IO. (#9134, #9289, #9303, #9318, thanks @straight-shoota, @bcardiff, @oprypin)
• (breaking-change) Cleanup Digest and OpenSSL::Digest. (#8426, thanks @didactic-drunk)
• Fix Enum#to_s for private enum. (#9126, thanks @straight-shoota)
• Refactor Benchmark::IPS::Entry to use UInt64 in bytes_per_op. (#9081, thanks @jhass)
• Add Experimental annotation and doc label. (#9244, thanks @bcardiff)
• Add subcommands to OptionParser. (#9009, #9133, thanks @RX14, @Sija)
• Make NamedTuple#sorted_keys public. (#9263, thanks @waj)
• Fix example codes in multiple places. (#9203, thanks @maiha)

Macros

• (breaking-change) Remove top-level assert_responds_to macro. (#9085, thanks @bcardiff)
• (breaking-change) Drop top-level parallel macro. (#9097, thanks @bcardiff)
• Fix lazy property not forwarding annotations. (#9140, thanks @asterite)
• Add host_flag? macro method, not affected by cross-compilation. (#9049, thanks @oprypin)
• Add .each and .each_with_index to various macro types. (#9120, thanks @Blacksmoke16)
• Add StringLiteral#titleize macro method. (#9269, thanks @makenowjust)
• Add TypeNode methods to check what "type" the node is. (#9270, thanks @Blacksmoke16)
• Fix support TypeNode.name(generic_args: false) for generic instances. (#9224, thanks @Blacksmoke16)

Numeric

• (breaking-change) Add Int#digits, reverse BigInt#digits result. (#9383, thanks @asterite)
• Fix overflow checking for operations with mixed sign. (#9403, thanks @waj)
• Add BigInt#factorial using GMP. (#9132, thanks @peheje)

Text

• Add String#titleize. (#9204, thanks @hugopl)
• Add Regex#matches? and String#matches?. (#8989, thanks @makenowjust)
• Add IO overloads to various String case methods. (#9236, thanks @Blacksmoke16)
• Improve docs examples regarding Regex::MatchData. (#9010, thanks @makenowjust)
• Improve docs on String methods. (#8447, thanks @jan-zajic)

Collections

• (breaking-change) Add Enumerable#first with fallback block. (#8999, thanks @makenowjust)
• Fix Array#delete_at bug with negative start index. (#9399, thanks @asterite)
• Fix Enumerable#{zip,zip?} when self is an Iterator. (#9330, thanks @mneumann)
• Make Range#each and Range#reverse_each work better with end/begin-less values. (#9325, thanks @asterite)
• Improve docs on Hash. (#8887, thanks @rdp)

Serialization

• (breaking-change) Deprecate JSON.mapping and YAML.mapping. (#9272, thanks @straight-shoota)
• (breaking-change) Make INI a module. (#9408, thanks @j8r)
• Fix integration between record macro and JSON::Serializable/YAML::Serializable regarding default values. (#9063, thanks @Blacksmoke16)
• Fix XML.parse invalid mem access in multi-thread. (#9098, thanks @bcardiff, @asterite)
• Fix double string escape in XML::Node#content=. (#9300, thanks @straight-shoota)
• Improve xpath regarding namespaces. (#9288, thanks @asterite)
• Escape CDATA end sequences. (#9230, thanks @Blacksmoke16)
• Add JSON and YAML serialization to Path. (#9156, thanks @straight-shoota)
• Specify pkg-config name for libyaml. (#9426, thanks @jhass)
• Specify pkg-config name for libxml2. (#9436, thanks @Blacksmoke16)
• Make YAML specs robust against libyaml 0.2.5. (#9427, thanks @jhass)

Time

• (breaking-change) Support different number of fraction digits for RFC3339 time format. (#9283, thanks @waj)
• Fix parsing AM/PM hours. (#9334, thanks @straight-shoota)
• Improve File.utime precision from second to 100-nanosecond on Windows. (#9344, thanks @kubo)

Files

• (breaking-change) Move Flate, Gzip, Zip, Zlib to Compress. (#8886, thanks @bcardiff)
• (breaking-change) Cleanup File & FileUtils. (#9175, thanks @bcardiff)
• Fix realpath on macOS 10.15 (Catalina). (#9296, thanks @waj)
• Fix File#pos, File#seek and File#truncate over 2G on Windows. (#9015, thanks @kubo)
• Fix File.rename to overwrite the destination file on Windows, like elsewhere. (#9038, thanks @oprypin)
• Fix File's specs and related exception types on Windows. (#9037, thanks @oprypin)
• Add support for Path arguments to multiple methods. (#9153, thanks @straight-shoota)
• Add Path#each_part iterator. (#9138, thanks @straight-shoota)
• Add Path#relative_to. (#9169, thanks @straight-shoota)
• Add support for Path pattern to Dir.glob. (#9420, thanks @straight-shoota)
• Implement File#fsync on Windows. (#9257, thanks @kubo)
• Refactor Path regarding empty and .. (#9137, thanks @straight-shoota)

Networking

• (breaking-change) Make IO#skip, IO#write returns the number of bytes it skipped/written as Int64. (#9233, #9363, thanks @bcardiff)
• (breaking-change) Improve error handling and logging in HTTP::Server. (#9115, #9034, thanks @waj, @straight-shoota)
• (breaking-change) Change HTTP::Request#remote_address type to Socket::Address?. (#9210, thanks @waj)
• Fix flush methods to always flush underlying IO. (#9320, thanks @straight-shoota)
• Fix HTTP::Server sporadic failure in SSL handshake. (#9177, thanks @waj)
• WebSocket shouldn't reply with same close code. (#9313, thanks @waj)
• Ignore response body during WebSocket handshake. (#9418, thanks @waj)
• Treat cookies which expire in this instant as expired. (#9061, thanks @RX14)
• Set sync or flush_on_newline for standard I/O on Windows. (#9207, thanks @kubo)
• Prefer HTTP basic authentication in OAuth2 client. (#9127, ...

0.34.0

Language changes

• (breaking-change) Exhaustive case expression check added, for now it produces warnings. (#8424, #8962, thanks @asterite, @Sija)
• Let Proc(T) be used as a Proc(Nil). (#8969, #8970, thanks @asterite)

Standard library

• (breaking-change) Replace Errno, WinError, IO::Timeout with RuntimeError, IO::TimeoutError, IO::Error, File::Error, Socket::Error, and subclasses. (#8885, thanks @waj)
• (breaking-change) Replace Logger module in favor of Log module. (#8847, #8976, thanks @bcardiff)
• (breaking-change) Move Adler32 and CRC32 to Digest. (#8881, thanks @bcardiff)
• (breaking-change) Remove DL module. (#8882, thanks @bcardiff)
• Enable more win32 specs. (#8683, #8822, thanks @straight-shoota)
• Make SemanticVersion::Prerelease comparable. (#8991, thanks @makenowjust)
• Use flag?(:i386) instead of obsolete flag?(:i686). (#8863, thanks @bcardiff)
• Remove Windows workaround using vsnprintf. (#8942, thanks @oprypin)
• Fixed docs broken link to ruby's prettyprint source. (#8915, thanks @MattHin)
• Update OptionParser example to exit on --help. (#8927, thanks @vlazar)

Numeric

• Fixed Float32#to_s corner-case. (#8838, thanks @toddsundsted)
• Fixed make Big*#to_u raise on negative values. (#8826, thanks @Sija)
• Fixed BigDecimal#to_big_i regression. (#8790, thanks @Sija)
• Add Complex#round. (#8819, thanks @miketheman)
• Add Int#bit_length and BigInt#bit_length. (#8924, #8931, thanks @asterite)
• Fixed docs of Int#gcd. (#8894, thanks @nard-tech)

Text

• (breaking-change) Deprecate top-level with_color in favor of Colorize.with. (#8892, #8958, thanks @bcardiff, @oprypin)
• Add overloads for String#ljust, String#rjust and String#center that take an IO. (#8923, thanks @asterite)
• Add missing Regex#hash and Regex::MatchData#hash. (#8986, thanks @makenowjust)
• Upgrade Unicode to 13.0.0. (#8906, thanks @Blacksmoke16)
• Revert deprecation of String#codepoint_at. (#8902, thanks @vlazar)
• Move Iconv to Crystal namespace. (#8890, thanks @bcardiff)

Collections

• Fixed make Range#size raise on an open range. (#8829, thanks @Sija)
• Add Enumerable#empty?. (#8960, thanks @Sija)
• (performance) Optimized Implementation of Array#fill for zero Values. (#8903, thanks @toddsundsted)
• Refactor Reflect to an Enumerable private definition. (#8884, thanks @bcardiff)

Serialization

• (breaking-change) Rename YAML::Builder.new with block to YAML::Builder.build. (#8896, thanks @straight-shoota)
• Add XML.build_fragment. (#8813, thanks @straight-shoota)
• Add CSV#rewind. (#8912, thanks @asterite)
• Add Deque#from_json and Deque#to_json. (#8850, thanks @carlhoerberg)
• Call to IO#flush on CSV, INI, JSON, XML, and YAML builders. (#8876, thanks @asterite)
• Add docs to Object.from_yaml. (#8800, thanks @wowinter13)

Time

• (breaking-change) Improve Time::Span initialization API with mandatory named arguments. (#8257, #8857, thanks @dnamsons, @bcardiff)
• Add Time::Span#total_microseconds. (#8966, thanks @vlazar)

Files

• Fixed multi-thread race condition by setting fd to -1 on closed File/Socket. (#8873, thanks @bcardiff)
• Fixed File.dirname with unicode chars. (#8911, thanks @asterite)
• Add IO::Buffered#flush_on_newline back and set it to true for non-tty. (#8935, thanks @asterite)
• Forward missing methods of IO::Hexdump to underlying IO. (#8908, thanks @carlhoerberg)

Networking

• (breaking-change) Correctly support WebSocket close codes. (#8975, #8981, thanks @RX14, @Sija)
• Make HTTP::Client return empty body_io if content-length is zero. (#8503, thanks @asterite)
• Fixed UDP specs in the case of a local firewall. (#8817, thanks @RX14)
• Fixed MIME spec examples to not collide with actual registry. (#8795, thanks @straight-shoota)
• Fixed UNIXServer, and HTTP::WebSocket specs to ensure server is accepting before closing. (#8755, #8879, thanks @bcardiff)
• Add type annotation to tls argument in HTTP. (#8678, thanks @j8r)
• Add Location to HTTP::Request common header names. (#8992, thanks @mamantoha)

Concurrency

• Add docs on Future regarding exceptions. (#8860, thanks @rdp)
• Disable occasionally failing Thread specs on musl. (#8801, thanks @straight-shoota)

System

• Fixed typo on src/signal.cr. (#8805, thanks @lbguilherme)

Runtime

• Fixed exceptions not being inspectable when running binary from PATH. (#8807, thanks @willhbr)
• Move AtExitHandlers to Crystal namespace. (#8883, thanks @bcardiff)

Compiler

• (breaking-change) Drop disable_overflow compiler flag. (#8772, thanks @Sija)
• Fixed url in "can't infer block return type" error message. (#8869, thanks @nilium)
• Fixed typo in math interpreter error message. (#8941, thanks @j8r)
• Use CRYSTAL_OPTS environment variable as default compiler options. (#8900, thanks @bcardiff)
• Avoid using the default --exclude-warnings value if some is specified. (#8899, thanks @bcardiff)
• Honor LIBRARY_PATH as default library path, and allow linking with no explicit /usr/lib:/usr/local/lib paths. (#8948, thanks @bcardiff)
• Fix Windows LLVM globals codegen in non-single-module mode. (#8978, thanks @oprypin)
• Add support for LLVM 10. (#8940, thanks @RX14)
• Remove redundant calls to Object.to_s in interpolation in compiler's code. (#8947, thanks @veelenga)

Language semantics

• Type as NoReturn if calling method on abstract class with no concrete subclasses. (#8870, thanks @asterite)

Tools

• Add crystal init name validation. (#8737, thanks @straight-shoota)

Doc generator

• Show warnings on docs command. (#8880, thanks @bcardiff)

Others

• CI improvements and housekeeping. (#8804, #8811, #8982, thanks @bcardiff,...

0.33.0

Language changes

• Allow timeout in select statements. (#8506, #8705, thanks @bcardiff, @firejox, @vlazar)

Macros

• Add TypeNode#name(generic_args : BoolLiteral) to return TypeNode's name with or without type vars. (#8483, thanks @Blacksmoke16)

Standard library

• (breaking-change) Remove several previously deprecated methods and modules: PartialComparable, Crypto::Bcrypt::Password#==, HTTP::Server::Response#respond_with_error, JSON::PullParser::Kind#==, Symbol#==(JSON::PullParser::Kind), JSON::Token#type, String#at, Time.new, Time.now, Time.utc_now, URI.escape, URI.unescape. (#8646, #8596, thanks @bcardiff, @Blacksmoke16)
• Fixed docs wording. (#8606, #8784, thanks @fxn)
• Add Object#in?. (#8720, #8723, thanks @Sija)
• Allow to create an enum from a symbol. (#8634, thanks @bew)
• Add VaList#next for getting the next element in a variadic argument list. (#8535, #8688, thanks @ffwff, @RX14)
• Refactor ARGF implementation. (#8593, thanks @arcage)
• Fixed specs of Colorize on dumb terminal. (#8673, thanks @oprypin)
• Fixed some specs on Win32. (#8670, thanks @straight-shoota)

Numeric

• Add BigInt#unsafe_shr. (#8763, thanks @asterite)
• Refactor Float#fdiv to use binary primitive. (#8662, thanks @bcardiff)

Text

• Fixed \u0000 wrongly added on String#sub(Hash) replaces last char. (#8644, thanks @mimame)

Collections

• Fixed Enumerable#zip to work with union types. (#8621, thanks @asterite)
• Fixed docs regarding Hash's initial_capacity. (#8569, thanks @r00ster91)

Serialization

• Improved JSON deserialization into union types. (#8689, thanks @kimburgess)
• Fixed expected error message in libxml2 error spec. (#8699, thanks @straight-shoota)
• Fixed JSON::PullParser overflow handling. (#8698, thanks @kimburgess)
• Fixed JSON::Any#dig?/YAML::Any#dig? on non-structure values. (#8745, thanks @Sija)

Time

• Fixed Time#shift over date boundaries with zone offset. (#8742, thanks @straight-shoota)

Files

• (breaking-change) Deprecate File::Info#owner, and File::Info#group; use owner_id, and group_id. (#8007, thanks @j8r)
• Fixed Path.new receiving Path as first argument. (#8753, thanks @straight-shoota)
• Fixed File.size and File.info to work with Path parameters. (#8625, thanks @snluu)
• Fixed Path specs when ENV["HOME"] is unset. (#8667, thanks @straight-shoota)
• Refactor Dir.mkdir_p to use Path#each_parent and make it work on Win32. (#8668, thanks @straight-shoota)
• Fixed IO::MultiWriter specs to close file before reading/deleting it. (#8674, thanks @oprypin)

Networking

• Fixed invalid call to libevent and race conditions on closed IO when resuming readable/writable event. (#8707, #8733, thanks @bcardiff)
• Fixed unexpected EOF in terminated SSL connection. (#8540, thanks @rdp)
• Fixed HTTP::Cookie to support Int64 max-age values. (#8759, thanks @asterite)
• Improve error message for getaddrinfo failure. (#8498, thanks @rdp)
• Make IO::SysCall#wait_readable and IO::SysCall#wait_writable public, yet :nodoc:. (#7366, thanks @stakach)
• Refactor StaticFileHandler to use Path. (#8672, thanks @straight-shoota)
• Remove fixed date in spec. (#8640, thanks @bcardiff)
• Remove non-portable error message in TCPServer spec. (#8702, thanks @straight-shoota)

Crypto

• Add Crypto::Bcrypt::Password check for invalid hash value. (#6467, thanks @miketheman)
• Improve documentation for Random::Secure. (#8484, thanks @straight-shoota)

Concurrency

• Fixed Future(Nil) when the block raises. (#8650, thanks @lbguilherme)
• Fixed IO closing in multi-thread mode. (#8733, thanks @bcardiff)
• Fixed some regular failing specs in multi-thread mode. (#8592, #8643, #8724, #8761, thanks @bcardiff)
• Add docs to Fiber. (#8739, thanks @straight-shoota)

System

• Enable system module for Win32 in prelude. (#8661, thanks @straight-shoota)
• Handle exceptions raised at __crystal_sigfault_handler. (#8743, thanks @waj)

Runtime

• Fixed wrongly collected exception object by the GC. Ensure LibUnwind::Exception struct is not atomic. (#8728, thanks @waj)
• Fixed reporting of non-statement rows in DWARF backtrace. (#8499, thanks @rdp)
• Add top level exception handler. (#8735, #8791, thanks @waj)
• Try to open stdio in non-blocking mode. (#8787, thanks @waj)
• Allow Crystal::System.print_error to use printf like format. (#8786, thanks @bcardiff)

Spec

• (breaking-change) Remove previously deprecated spec method assert. (#8767, thanks @Blacksmoke16)
• Spec::JUnitFormatter output and options enhancements. (#8599, #8692, thanks @Sija, @bcardiff)

Compiler

• (breaking-change) Drop support for previously deprecated comma separators in enums and other cleanups. (#8657, thanks @bcardiff)
• (breaking-change) Drop uppercase F32 and F64 float number suffixes. (#8782, thanks @rhysd)
• Fixed memory corruption issues by using LLVM's memset and memcpy that matches target machine. (#8746, thanks @bcardiff)
• Fixed ICE when trying to add type inside annotation. (#8628, thanks @asterite)
• Fixed ICE on typeof in an unused block. (#8695, thanks @asterite)
• Fixed ICE in case of wrong target triple. (#8710, thanks @Sija)
• Fixed ICE when raising a macro exception with empty message. (#8654, thanks @jan-zajic)
• Fixed parser bug macro with "eenum" in it. (#8760, thanks @asterite)
• Change CRYSTAL_PATH to allow shards to override std-lib. (#8752, thanks @bcardiff)

Language semantics

• Fixed missing virtualization of Proc pointer. (#8757, thanks @asterite)
• Fixed type of vars after begin/rescue if all rescue are unreachable. (#8758, thanks @asterite)
• Fixed visibility propagation to macro expansions in all cases. (#8762, #8796, thanks @asterite)

Tools

• Update crystal init to handle .. (#8681, thanks @jethrodaniel)

Formatter

• Fixed indent after comme...