rust/tests/ui/numbers-arithmetic/overflowing-mul.rs

//@ run-fail
//@ regex-error-pattern: thread 'main'.*panicked
//@ error-pattern: attempt to multiply with overflow
//@ needs-subprocess
//@ compile-flags: -C debug-assertions

#![allow(arithmetic_overflow)]

fn main() {
    let x = 200u8 * 4;
}
Move tests from `test/run-fail` to UI 2020-04-16 15:50:32 +09:00			`//@ run-fail`
Print thread ID in panic message if thread name is unknown `panic!` does not print any identifying information for threads that are unnamed. However, in many cases, the thread ID can be determined. This changes the panic message from something like this: thread '<unnamed>' panicked at src/main.rs:3:5: explicit panic To something like this: thread '<unnamed>' (0xff9bf) panicked at src/main.rs:3:5: explicit panic Stack overflow messages are updated as well. This change applies to both named and unnamed threads. The ID printed is the OS integer thread ID rather than the Rust thread ID, which should also be what debuggers print. 2023-09-11 00:59:31 -04:00			`//@ regex-error-pattern: thread 'main'.*panicked`
			`//@ error-pattern: attempt to multiply with overflow`
tests: use `needs-subprocess` instead of `ignore-{wasm32,emscripten,sgx}` 2025-01-23 16:36:54 +08:00			`//@ needs-subprocess`
rustc: Add a debug_assertions #[cfg] directive This commit is an implementation of [RFC 563][rfc] which adds a new `cfg(debug_assertions)` directive which is specially recognized and calculated by the compiler. The flag is turned off at any optimization level greater than 1 and may also be explicitly controlled through the `-C debug-assertions` flag. [rfc]: https://github.com/rust-lang/rfcs/pull/563 The `debug_assert!` and `debug_assert_eq!` macros now respect this instead of the `ndebug` variable and `ndebug` no longer holds any meaning to the standard library. Code which was previously relying on `not(ndebug)` to gate expensive code should be updated to rely on `debug_assertions` instead. Closes #22492 [breaking-change] 2015-03-02 14:51:24 -08:00			`//@ compile-flags: -C debug-assertions`
Fix the overflowing tests in run-fail. * The error patterns had a typo. * Our current constant evaluation would silently allow the overflow (filed as Issue 22531). * The overflowing-mul test was accidentally doing addition instead of multiplication. 2015-02-19 12:37:27 +01:00
better lint names 2020-02-18 22:49:47 +01:00			`#![allow(arithmetic_overflow)]`
Make the `const_err` lint `deny`-by-default 2018-05-11 14:33:37 +02:00
rustc: implement arithmetic overflow checking Adds overflow checking to integer addition, multiplication, and subtraction when `-Z force-overflow-checks` is true, or if `--cfg ndebug` is not passed to the compiler. On overflow, it panics with `arithmetic operation overflowed`. Also adds `overflowing_add`, `overflowing_sub`, and `overflowing_mul` intrinsics for doing unchecked arithmetic. [breaking-change] 2015-01-06 00:56:30 -05:00			`fn main() {`
implement RFC 1229 const eval errors outside of true constant enviroments are not reported anymore, but instead forwarded to a lint. 2015-10-02 10:36:45 +02:00			`let x = 200u8 * 4;`
rustc: implement arithmetic overflow checking Adds overflow checking to integer addition, multiplication, and subtraction when `-Z force-overflow-checks` is true, or if `--cfg ndebug` is not passed to the compiler. On overflow, it panics with `arithmetic operation overflowed`. Also adds `overflowing_add`, `overflowing_sub`, and `overflowing_mul` intrinsics for doing unchecked arithmetic. [breaking-change] 2015-01-06 00:56:30 -05:00			`}`