rust/tests/ui/panic-handler/weak-lang-item.rs

//@ aux-build:weak-lang-items.rs
//@ needs-unwind since it affects the error output
//@ ignore-emscripten missing eh_catch_typeinfo lang item

#![no_std]

extern crate core; //~ ERROR the name `core` is defined multiple times
extern crate weak_lang_items;

fn main() {}

//~? ERROR `#[panic_handler]` function required, but not found
//~? ERROR unwinding panics are not supported without std
[AUTO-GENERATED] Migrate ui tests from `//` to `//@` directives 2024-02-16 20:02:50 +00:00			`//@ aux-build:weak-lang-items.rs`
			`//@ needs-unwind since it affects the error output`
			`//@ ignore-emscripten missing eh_catch_typeinfo lang item`
rustc: Add official support for weak failure This commit is part of the ongoing libstd facade efforts (cc #13851). The compiler now recognizes some language items as "extern { fn foo(...); }" and will automatically perform the following actions: 1. The foreign function has a pre-defined name. 2. The crate and downstream crates can only be built as rlibs until a crate defines the lang item itself. 3. The actual lang item has a pre-defined name. This is essentially nicer compiler support for the hokey core-depends-on-std-failure scheme today, but it is implemented the same way. The details are a little more hidden under the covers. In addition to failure, this commit promotes the eh_personality and rust_stack_exhausted functions to official lang items. The compiler can generate calls to these functions, causing linkage errors if they are left undefined. The checking for these items is not as precise as it could be. Crates compiling with `-Z no-landing-pads` will not need the eh_personality lang item, and crates compiling with no split stacks won't need the stack exhausted lang item. For ease, however, these items are checked for presence in all final outputs of the compiler. It is quite easy to define dummy versions of the functions necessary: #[lang = "stack_exhausted"] extern fn stack_exhausted() { /* ... / } #[lang = "eh_personality"] extern fn eh_personality() { / ... */ } cc #11922, rust_stack_exhausted is now a lang item cc #13851, libcollections is blocked on eh_personality becoming weak 2014-05-19 09:30:09 -07:00
			`#![no_std]`

compiletest: Require `//~` annotations even if `error-pattern` is specified 2025-03-29 02:41:32 +03:00			extern crate core; //~ ERROR the name `core` is defined multiple times
Fix fallout of removing quotes in crate names 2015-03-27 10:22:44 -07:00			`extern crate weak_lang_items;`
rustc: Remove lang item methods from CrateStore Given the previous commit, these are now trivially representable as queries! 2017-08-31 09:19:33 -07:00
			`fn main() {}`
compiletest: Require `//~` annotations even if `error-pattern` is specified 2025-03-29 02:41:32 +03:00
			//~? ERROR `#[panic_handler]` function required, but not found
			`//~? ERROR unwinding panics are not supported without std`