[llvm-bugs] [Bug 50581] Compiler "clang" makes optimization error (Ubuntu 20.04.2 LTS, clang version 10.0.0-4ubuntu1)

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50581

David Blaikie <dblaikie at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dblaikie at gmail.com
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED

--- Comment #2 from David Blaikie <dblaikie at gmail.com> ---
Yep, undefined behavior:

$ clang++ -fsanitize=undefined test.cpp && ./a.out
test.cpp:8:12: runtime error: reference binding to null pointer of type
'AnyClassOrType'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior test.cpp:8:12 in 
nullptr == Ptr true
nullptr == RefPtr true
RefPtr == (nil)

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