[llvm-bugs] [Bug 45771] New: Frontend crash on += operator with ISO/IEC 18037 types

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45771

            Bug ID: 45771
           Summary: Frontend crash on += operator with ISO/IEC 18037 types
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C
          Assignee: unassignedclangbugs at nondot.org
          Reporter: shuber at sthu.org
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Created attachment 23432
  --> https://bugs.llvm.org/attachment.cgi?id=23432&action=edit
Backtrace

The frontend of clang-9.0.1 on Gentoo Linux crashes when compiling a C file
that contains an invocation of the += operator on ISO/IEC 18037 types, like
_Fract, _Accum or variants of these.

I could not reproduce this issue with clang-7.0.1-8 on Debian Buster or with
clang-10.0.0 on Windows via msys2. However, Michał Górny could reproduce it on
10.0.0 on Gentoo Linux as well, see https://bugs.gentoo.org/720270

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