[llvm-bugs] [Bug 26490] New: clang-cl.exe from 3.9.0/32bit crashes compiling Qt 5 source qtbase/src/widgets/graphicsview/qgraphicsscenelinearindex.cpp

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26490

            Bug ID: 26490
           Summary: clang-cl.exe from 3.9.0/32bit crashes compiling Qt 5
                    source
                    qtbase/src/widgets/graphicsview/qgraphicsscenelinearin
                    dex.cpp
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: Friedemann.Kleint at theqtcompany.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

When using LLVM-3.9.0-r259040-win32.exe with MSVC2015 Professional Update 1 on
Windows 10 to build Qt 5, dev branch at qtbase:
58bd015ddff84c6bd0b5dcff54b9512e188f346c and the experimental change

https://codereview.qt-project.org/#/c/145351/ 

applied on top using the configure options:

-confirm-license -developer-build -opensource -debug -nomake tests -nomake
examples -opengl dynamic -no-headersclean

a crash occurs when compiling
qtbase/src/widgets/graphicsview/qgraphicsscenelinearindex.cpp:

Assertion failed: DefaultArg && "sema forgot to instantiate default args", file
D:\src\llvm_package_259040\llvm\tools\clang\lib\CodeGen\MicrosoftCXXABI.cpp,
line 3857

(full log + sources in attached zip file)

Reportedly, this is working with 3.8.

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