twoh added a comment.
@rsmith Thank you for your review! I added tests to cxx11-crashes.cpp, as the
goal of this patch is not handling __has_* traits right but preventing ICE.
Also, I tried to use ConstructorUsingShadowDecl::getConstructor instead of
ConstructorUsingShadowDecl::getTargetDecl followed by casting, but clang build
was failed with undefined references. I wonder if the definition of
ConstructorUsingShadowDecl::getConstructor is missed in
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