[llvm-bugs] [Bug 49626] New: Frontend crash when compiling with -O2

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49626

            Bug ID: 49626
           Summary: Frontend crash when compiling with -O2
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++2a
          Assignee: unassignedclangbugs at nondot.org
          Reporter: koncek.marian at gmail.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

Created attachment 24656
  --> https://bugs.llvm.org/attachment.cgi?id=24656&action=edit
short source which causes the crash

See (also as an attachment):
https://godbolt.org/z/fb9adx

compile with:
$ clang++ -std=c++2a example.cpp -O2

It seems like this crash happens only with this particular setup, i. e.
inheriting from std::array, casting to std::string_view and printing to cout.

Removing various parts made clang work fine.

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