[fuzz] Assertion `isa<CXXConversionDecl>(Meth) && "expected conversion"' failed.

[llvmbot]

Bugzilla Link	21831
Resolution	FIXED
Resolved on	Oct 21, 2016 17:44
Version	trunk
OS	Linux
Blocks	#23431
Attachments	test case
Reporter	LLVM Bugzilla Contributor
CC	@majnemer,@rnk

Extended Description

Fuzzing discovered that the attached test case, when given as input to

clang -fno-crash-diagnostics -std=c++11 -xc++ -c -emit-llvm

causes this assertion failure:

clang-3.6: tools/clang/lib/Sema/SemaOverload.cpp:8546: (anonymous namespace)::OverloadCandidateKind (anonymous namespace)::ClassifyOverloadCandidate(clang::Sema &, clang::FunctionDecl *, std::string &): Assertion `isa(Meth) && "expected conversion"' failed.

[majnemer]

more sane test case:
class C {};
void &C::~C() { C::~C; };

this also crashes MSVC

[rnk]

Looks like we fixed it somewhere along the way:

t.cpp:2:6: error: cannot form a reference to 'void'
void &C::~C() { C::~C; };
^
t.cpp:2:20: error: reference to destructor must be called; did you mean to call it with no arguments?
void &C::~C() { C::C; };
~~~^
()
2 errors generated.

[kcc]

mentioned in issue #23431