rust/tests/ui/mir/null/two_pointers.rs

//@ run-crash
//@ compile-flags: -C debug-assertions
//@ error-pattern: null pointer dereference occurred

fn main() {
    let ptr = std::ptr::null();
    let mut dest = 0u32;
    let dest_ptr = &mut dest as *mut u32;
    unsafe {
        *dest_ptr = *(ptr);
    }
}
tests: Require `run-fail` ui tests to have an exit code (`SIGABRT` not ok) And introduce two new directives for ui tests: * `run-crash` * `run-fail-or-crash` Normally a `run-fail` ui test like tests that panic shall not be terminated by a signal like `SIGABRT`. So begin having that as a hard requirement. Some of our current tests do terminate by a signal/crash however. Introduce and use `run-crash` for those tests. Note that Windows crashes are not handled by signals but by certain high bits set on the process exit code. Example exit code for crash on Windows: `0xc000001d`. Because of this, we define "crash" on all platforms as "not exit with success and not exit with a regular failure code in the range 1..=127". Some tests behave differently on different targets: * Targets without unwind support will abort (crash) instead of exit with failure code 101 after panicking. As a special case, allow crashes for `run-fail` tests for such targets. * Different sanitizer implementations handle detected memory problems differently. Some abort (crash) the process while others exit with failure code 1. Introduce and use `run-fail-or-crash` for such tests. 2025-06-25 07:56:40 +02:00			`//@ run-crash`
Insert null checks for pointer dereferences when debug assertions are enabled Similar to how the alignment is already checked, this adds a check for null pointer dereferences in debug mode. It is implemented similarly to the alignment check as a MirPass. This is related to a 2025H1 project goal for better UB checks in debug mode: https://github.com/rust-lang/rust-project-goals/pull/177. 2024-12-17 13:00:22 +00:00			`//@ compile-flags: -C debug-assertions`
occured -> occurred 2025-02-08 22:28:21 +00:00			`//@ error-pattern: null pointer dereference occurred`
Insert null checks for pointer dereferences when debug assertions are enabled Similar to how the alignment is already checked, this adds a check for null pointer dereferences in debug mode. It is implemented similarly to the alignment check as a MirPass. This is related to a 2025H1 project goal for better UB checks in debug mode: https://github.com/rust-lang/rust-project-goals/pull/177. 2024-12-17 13:00:22 +00:00
			`fn main() {`
			`let ptr = std::ptr::null();`
			`let mut dest = 0u32;`
			`let dest_ptr = &mut dest as *mut u32;`
			`unsafe {`
			`dest_ptr = (ptr);`
			`}`
			`}`