java.lang.IllegalArgumentException: Locale part contains invalid characters

[masseyLsui]

This exception also leads to a 500 error.

Envrioment:
-Version 2.17.0
-Jdk: 1.8.0_202
-tomcat: 8.5.71

stacktrace:

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: Locale part "372.92268390754566" contains invalid characters
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.forwardToErrorPage(ErrorPageFilter.java:191)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.handleException(ErrorPageFilter.java:176)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:143)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.access$000(ErrorPageFilter.java:64)
	org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:101)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:119)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
Root Cause, java.lang.IllegalArgumentException: Locale part "372.92268390754566" contains invalid characters
	org.springframework.util.StringUtils.validateLocalePart(StringUtils.java:878)
	org.springframework.util.StringUtils.parseLocale(StringUtils.java:815)
	org.springframework.web.servlet.i18n.LocaleChangeInterceptor.parseLocaleValue(LocaleChangeInterceptor.java:195)
	org.springframework.web.servlet.i18n.LocaleChangeInterceptor.preHandle(LocaleChangeInterceptor.java:154)
	org.springframework.web.servlet.HandlerExecutionChain.applyPreHandle(HandlerExecutionChain.java:148)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1059)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.forwardToErrorPage(ErrorPageFilter.java:191)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.handleException(ErrorPageFilter.java:176)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:143)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.access$000(ErrorPageFilter.java:64)
	org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:101)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:119)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

reproducible script
curl:

curl -c cookies.txt -d "[email protected]&password=password" -H "Content-Type: application/x-www-form-urlencoded" -X POST http://localhost:8080/admin/performUserLogin
curl -b cookies.txt -F "locale=372.92268390754566" -X POST http://localhost:8080/static/products/OpenBSD/someday/.biLevel

intelliJ http client:

POST http://localhost:8080/admin/performUserLogin
Content-Type: application/x-www-form-urlencoded

[email protected]&password=password

###
POST http://localhost:8080/static/products/OpenBSD/someday/.biLevel
Content-Type: multipart/form-data; boundary=WebAppBoundary

--WebAppBoundary
Content-Disposition: form-data; name="locale"

372.92268390754566
--WebAppBoundary--