gnu::cleanup can call gnu::error function

[xBZZZZ]

clang compiles this with no error:

[[gnu::error("error please")]]
void cleaner_function(char*);

void asdf(void){
	[[gnu::cleanup(cleaner_function)]]
	char x;
}

clang is x86_64 20.1.7 downloaded from https://mirrors.edge.kernel.org/pub/tools/llvm/

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: None (xBZZZZ)

clang compiles this with no error: ```c [[gnu::error("error please")]] void cleaner_function(char*);

void asdf(void){
[[gnu::cleanup(cleaner_function)]]
char x;
}

clang is x86_64 20.1.7 downloaded from https://mirrors.edge.kernel.org/pub/tools/llvm/
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