[llvm-bugs] [Bug 36130] New: Assertion failed: (Proto && "Functions without a prototype cannot be overloaded"), function AddOverloadCandidate, file tools/clang/lib/Sema/SemaOverload.cpp, line 5901.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36130

            Bug ID: 36130
           Summary: Assertion failed: (Proto && "Functions without a
                    prototype cannot be overloaded"), function
                    AddOverloadCandidate, file
                    tools/clang/lib/Sema/SemaOverload.cpp, line 5901.
           Product: new-bugs
           Version: 6.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: dimitry at andric.com
                CC: llvm-bugs at lists.llvm.org

As reported in https://bugs.freebsd.org/205934, a configure script test uses
the following very short fragment to check #pragma weak support:

extern int test2();
#pragma weak test2 = test1
int test1() { return 0; }
int main() { return test2(); return 0; }

Compiling this without any special flags already asserts:

$ clang -cc1 -triple x86_64 -S weak.c
Assertion failed: (Proto && "Functions without a prototype cannot be
overloaded"), function AddOverloadCandidate, file
/usr/src/contrib/llvm/tools/clang/lib/Sema/SemaOverload.cpp, line 5903.
Abort trap

This has apparently been happening since forever, the oldest version I checked
was trunk r185261, but it is still reproducible with trunk r323607, as of
2018-01-28.

Would be nice to fix it after all those years... :)

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