rust/tests/ui/duplicate/dupe-symbols-8.rs

//@ build-fail
//@ error-pattern: entry symbol `main` declared multiple times
//@ ignore-wasi wasi does different things with the `main` symbol
//
// See #67946.

#![allow(warnings)]
fn main() {
    extern "Rust" {
     fn main();
    }
    unsafe { main(); }
}
Fail on multiple declarations of `main`. Previously, when inserting the entry function, we only checked for duplicate _definitions_ of `main`. However, it's possible to cause problems even only having a duplicate _declaration_. For example, shadowing `main` using an extern block isn't caught by the current check, and causes an assertion failure down the line in in LLVM code. 2020-02-22 15:43:47 +00:00			`//@ build-fail`
			//@ error-pattern: entry symbol `main` declared multiple times
Update test directives for `wasm32-wasip1` * The WASI targets deal with the `main` symbol a bit differently than native so some `codegen` and `assembly` tests have been ignored. * All `ignore-emscripten` directives have been updated to `ignore-wasm32` to be more clear that all wasm targets are ignored and it's not just Emscripten. * Most `ignore-wasm32-bare` directives are now gone. * Some ignore directives for wasm were switched to `needs-unwind` instead. * Many `ignore-wasm32*` directives are removed as the tests work with WASI as opposed to `wasm32-unknown-unknown`. 2024-03-06 20:44:54 +00:00			//@ ignore-wasi wasi does different things with the `main` symbol
Fail on multiple declarations of `main`. Previously, when inserting the entry function, we only checked for duplicate _definitions_ of `main`. However, it's possible to cause problems even only having a duplicate _declaration_. For example, shadowing `main` using an extern block isn't caught by the current check, and causes an assertion failure down the line in in LLVM code. 2020-02-22 15:43:47 +00:00			`//`
			`// See #67946.`

			`#![allow(warnings)]`
			`fn main() {`
			`extern "Rust" {`
			`fn main();`
			`}`
			`unsafe { main(); }`
			`}`