ptrace call in src/breakpoint.c:29 returned -1: No such process (3)

[Arinerron]

$ heaptrace -F /bin/bash -c 'help & help & help' > /dev/null
...
... #3232: malloc(0x10)                                                                             = 0x555555683a10 
... #3233: malloc(0x20)                                                                             = 0x555555683a30 
... #3234: malloc(0x20)                                                                             = 0x555555683a60 
... #3235: malloc(0x20)                                                                             = 0x555555683a90 
... #3236: malloc(0x20)                                                                             = 0x555555683ac0 
... #3237: malloc(0x40)                                                                             = 0x555555683af0 
... #3238: malloc(0x05)                                                                             = 0x555555683b40 
... #3239: malloc(0x05)                                                                             = 0x555555683b60 
Detected fork in process (1313003->1313006). Following fork...
... #3240: free(#3239)                                                                                                                                                                                                                             (#3239=0x555555683b60)
... #3241: malloc(0x10)                                                                             = 0x555555683b60 
... #3242: malloc(0x05)                                                                             = 0x555555683b80 
... #3243: malloc(0x10)                                                                             = 0x555555683ba0 
... #3244: malloc(0x70)                                                                             = 0x55555564d6b0 
... #3245: malloc(0x02)                                                                             = 0x555555683bc0 
... #3246: free(#3245) heaptrace warning: ptrace call in src/breakpoint.c:29 returned -1: No such process (3):
	ptrace(PTRACE_POKEDATA, ctx->pid, vaddr, (orig_data & ~((uint64_t)0xff)) | ((uint64_t)'\xcc' & (uint64_t)0xff))
heaptrace warning: heaptrace failed to install "_tmp" breakpoint at 0xffffffffffffffff in process 1313006: No such process (3)
heaptrace warning: ptrace call in src/debugger.c:112 returned -1: No such process (3):
	ptrace(PTRACE_POKEDATA, ctx->pid, reg_rip, ((uint64_t)bp->orig_data & ~((uint64_t)0xff)) | ((uint64_t)'\xcc' & (uint64_t)0xff))
heaptrace warning: ptrace call in src/debugger.c:718 returned -1: No such process (3):
	ptrace(PTRACE_SETOPTIONS, ctx->pid, NULL, PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK | PTRACE_O_TRACECLONE | PTRACE_O_TRACEEXEC)
heaptrace warning: ptrace call in src/debugger.c:719 returned -1: No such process (3):
	ptrace(PTRACE_CONT, ctx->pid, NULL, NULL)

redirecting to /dev/null seems to sometimes trigger this bug

[Arinerron]

here's another

... #3277: malloc(0x20)                                                                             = 0x5555556830c0 
... #3278: malloc(0x40)                                                                             = 0x5555556830f0 
... #3279: malloc(0x05)                                                                             = 0x555555683140 
... #3280: malloc(0x05)                                                                             = 0x555555683160 
Detected fork in process (1091067->1091069). Following fork...
... #3281: free(#3280)                                                                                                                                                                                                                             (#3280=0x555555683160)
... #3282: malloc(0x10) heaptrace warning: ptrace call in src/breakpoint.c:29 returned -1: Input/output error (5):
	ptrace(PTRACE_POKEDATA, ctx->pid, vaddr, (orig_data & ~((uint64_t)0xff)) | ((uint64_t)'\xcc' & (uint64_t)0xff))
heaptrace warning: heaptrace failed to install "_tmp" breakpoint at 0xffffffffffffffff in process 1091069: Input/output error (5)

============ END HEAPTRACE =============
Statistics:
... mallocs count: 2689
... callocs count: 549
... frees count: 42
... reallocs count: 2
... unfreed bytes: 0x37620

you have to run it a few times