__builtin_verbose_trap with empty string arguments should be treated as an error

[delcypher]

Clang currently accepts this:

void test(void) {
    __builtin_verbose_trap("","");
}

Clang's sema should not accept this as it doesn't make any sense to have both the category and message parameters be empty.

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Dan Liew (delcypher)

Clang currently accepts this:

void test(void) {
    __builtin_verbose_trap("","");
}

Clang's sema should not accept this as it doesn't make any sense to have both the category and message parameters be empty.