[llvm-bugs] [Bug 28311] New: Regression(r273807): Assertion failed: UndefinedSubrange || ElementSize == Size when building chrome/win with debug info

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28311

            Bug ID: 28311
           Summary: Regression(r273807): Assertion failed:
                    UndefinedSubrange || ElementSize == Size when building
                    chrome/win with debug info
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: DebugInfo
          Assignee: unassignedbugs at nondot.org
          Reporter: nicolasweber at gmx.de
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

https://build.chromium.org/p/chromium.fyi/builders/CrWinAsan/builds/3718/steps/compile/logs/stdio

[602/30294] CXX obj\third_party\modp_b64\modp_b64_win64.modp_b64.obj
FAILED: obj/third_party/modp_b64/modp_b64_win64.modp_b64.obj 
ninja -t msvc -e environment.x64 --
"..\..\third_party/llvm-build/Release+Asserts/bin/clang-cl" -m64 /nologo
/showIncludes /FC @obj\third_party\modp_b64\modp_b64_win64.modp_b64.obj.rsp /c
..\..\third_party\modp_b64\modp_b64.cc
/Foobj\third_party\modp_b64\modp_b64_win64.modp_b64.obj
/Fdobj\third_party\modp_b64\modp_b64_win64.cc.pdb 
Assertion failed: UndefinedSubrange || ElementSize == Size, file
C:\b\build\slave\CrWinAsan\build\src\third_party\llvm\lib\CodeGen\AsmPrinter\CodeViewDebug.cpp,
line 961
Wrote crash dump file
"C:\Users\CHROME~1\AppData\Local\Temp\clang-cl.exe-d44a56.dmp"
#0 0x0000000140a03255
(C:\b\build\slave\CrWinAsan\build\src\third_party\llvm-build\Release+Asserts\bin\clang-cl.exe+0xfe3255)


That's very early in the build, so I'd expect this to repro eg in self-host
clang builds (or when building any project really).

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