[llvm-bugs] [Bug 141536] [clang] Discarding a use of a [[nodiscard]] `consteval` function does not emit a nodiscard warning

[LLVM Bugs via llvm-bugs]

Issue	141536
Summary	[clang] Discarding a use of a [[nodiscard]] `consteval` function does not emit a nodiscard warning
Labels	clang
Assignees
Reporter	smallp-o-p

    It emits an `_expression_ result unused` warning instead. GCC emits the `nodiscard` warning. 

``` 
[[nodiscard]] consteval int foo(){ return 1; }

[[nodiscard]] int foo2(){ return 1; }

int main(){
    foo(); // <-- emits an _expression_ result unused warning
    foo2(); 
}
```
See: https://godbolt.org/z/9fEG8c5Mx

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