[LLVMbugs] [Bug 14630] New: close-stderr.ll test hangs on musl libc

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14630

             Bug #: 14630
           Summary: close-stderr.ll test hangs on musl libc
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Support Libraries
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: ojab at ojab.ru
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Exact part is: `opt --reject-this-option 2>&-`, which exits with code 1 on
glibc, but hangs on musl [1].

In case of invalid argument to `opt`, "if (ErrorParsing) exit(1);" is called.

Then, if stderr is invalid, report_fatal_error("IO failure on output stream.")
is called in raw_fd_ostream destructor, which calls exit() itself, but it is
incorrect due to undefined behavior, according to musl developers.


Please also see the http://www.openwall.com/lists/musl/2012/12/18/3
message/thread in musl mail list.

[1] http://www.musl-libc.org/

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