rust/src/test/ui/iterators/iter-position-overflow-debug.rs
Thomas Lively 62c3443e96 Re-enable Emscripten's exception handling support
Passes LLVM codegen and Emscripten link-time flags for exception
handling if and only if the panic strategy is `unwind`. Sets the
default panic strategy for Emscripten targets to `unwind`. Re-enables
tests that depend on unwinding support for Emscripten, including
`should_panic` tests.
2019-10-25 15:16:36 -07:00

22 lines
549 B
Rust

// run-pass
// only-32bit too impatient for 2⁶⁴ items
// ignore-wasm32-bare compiled with panic=abort by default
// compile-flags: -C debug_assertions=yes -C opt-level=3
use std::panic;
use std::usize::MAX;
fn main() {
let n = MAX as u64;
assert_eq!((0..).by_ref().position(|i| i >= n), Some(MAX));
let r = panic::catch_unwind(|| {
(0..).by_ref().position(|i| i > n)
});
assert!(r.is_err());
let r = panic::catch_unwind(|| {
(0..=n + 1).by_ref().position(|_| false)
});
assert!(r.is_err());
}