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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/closures/2229_closure_analysis/run_pass/lit-pattern-matching-with-methods.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/closures/2229_closure_analysis/run_pass/lit-pattern-matching-with-methods.rs b/src/test/ui/closures/2229_closure_analysis/run_pass/lit-pattern-matching-with-methods.rs new file mode 100644 index 000000000..d2375aa69 --- /dev/null +++ b/src/test/ui/closures/2229_closure_analysis/run_pass/lit-pattern-matching-with-methods.rs @@ -0,0 +1,30 @@ +// edition:2021 +//check-pass +#![warn(unused)] +#![feature(rustc_attrs)] +#![feature(btree_drain_filter)] + +use std::collections::BTreeMap; +use std::panic::{catch_unwind, AssertUnwindSafe}; + +fn main() { + let mut map = BTreeMap::new(); + map.insert("a", ()); + map.insert("b", ()); + map.insert("c", ()); + + { + let mut it = map.drain_filter(|_, _| true); + catch_unwind(AssertUnwindSafe(|| while it.next().is_some() {})).unwrap_err(); + let result = catch_unwind(AssertUnwindSafe(|| it.next())); + assert!(matches!(result, Ok(None))); + } + + { + let mut it = map.drain_filter(|_, _| true); + catch_unwind(AssertUnwindSafe(|| while let Some(_) = it.next() {})).unwrap_err(); + let result = catch_unwind(AssertUnwindSafe(|| it.next())); + assert!(matches!(result, Ok(None))); + } + +} |