[LLVMbugs] [Bug 22494] New: Assertion `Origin && "Missing origin"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22494

            Bug ID: 22494
           Summary: Assertion `Origin && "Missing origin"' failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Miscellaneous Instrumentation passes
          Assignee: unassignedbugs at nondot.org
          Reporter: hans at chromium.org
                CC: eugeni.stepanov at gmail.com, llvmbugs at cs.uiuc.edu
            Blocks: 22374
    Classification: Unclassified

Created attachment 13817
  --> http://llvm.org/bugs/attachment.cgi?id=13817&action=edit
unreduced repro

This fires when building Chromium with msan.

This reproduces on the 3.6 release branch, so I've marked it a release blocker.

Unreduced repro attached. Run line:

clang "-cc1" "-triple" "x86_64-unknown-linux-gnu" "-emit-obj" "-disable-free" 
"-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix"
"-mdisable-fp-elim" "-relaxed-aliasing" "-fmath-errno" "-masm-verbose"
"-mconstructor-aliases" "-munwind-tables" "-fuse-init-array" "-target-cpu"
"x86-64" "-momit-leaf-frame-pointer" "-gline-tables-only" "-dwarf-column-info"
"-ffunction-sections" "-fdata-sections" "-nostdinc++"  "-O2"  "-std=gnu++11"
"-fdeprecated-macro"  "-fvisibility" "hidden" "-fvisibility-inlines-hidden"
"-fsanitize=memory" "-fsanitize-memory-track-origins=2"
"-fno-assume-sane-operator-new" "-pthread" "-stack-protector" "1"
"-stack-protector-buffer-size" "4" "-mstackrealign" "-fno-rtti"
"-fno-threadsafe-statics" "-fobjc-runtime=gcc" "-vectorize-loops"
"-vectorize-slp" "-x" "c++" "missingorigin.cpp"

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