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Use existing declaration of rust_eh_personality
If crate declares `rust_eh_personality`, re-use existing declaration as otherwise attempts to set function attributes that follow the declaration will fail (unless it happens to have exactly the same type signature as the one predefined in the compiler).
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// Check that rust_eh_personality can have a different type signature than the | ||
// one hardcoded in the compiler. Regression test for #70117. Used to fail with: | ||
// | ||
// Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed. | ||
// | ||
// build-pass | ||
// compile-flags: --crate-type=lib -Ccodegen-units=1 | ||
#![no_std] | ||
#![panic_runtime] | ||
#![feature(panic_runtime)] | ||
#![feature(rustc_attrs)] | ||
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pub struct DropMe; | ||
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impl Drop for DropMe { | ||
fn drop(&mut self) {} | ||
} | ||
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pub fn test(_: DropMe) { | ||
unreachable!(); | ||
} | ||
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#[rustc_std_internal_symbol] | ||
pub unsafe extern "C" fn rust_eh_personality() {} |