[LLVMbugs] [Bug 12080] New: Spurious EPIPE on stdout writer, possibly due to early finding EOF in Bitcode Reader

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12080

             Bug #: 12080
           Summary: Spurious EPIPE on stdout writer, possibly due to early
                    finding EOF in Bitcode Reader
           Product: libraries
           Version: trunk
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Bitcode Reader
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: geek4civic at gmail.com
                CC: dschuff at google.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Since r149918, a few llvm tests might fail accidentally.

It can be reproduced;
llvm-lit -sv --repeat=2000 test/Transforms/ADCE/basictest1.ll

When "opt | llvm-dis", opt might complain EPIPE.
When "opt | cat | llvm-dis", cat might complain EPIPE.

FYI, I have reconfirmed to revert commits as below;
r149918, "Enable streaming of bitcode"
r149919, "System headers after llvm headers."
r149922, "Fix comment-rulers."
r149941, "Fix win32 build breakage from bitcode streaming patch"
r149980, "Bitcode/BitstreamReader.h: Tweak for big endian hosts."
r150120, "Remove static initializer from DataStream.cpp"
r150197, "Change default error_code ctor to a 'named ctor' so it..."

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