diff options
Diffstat (limited to 'src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.stderr')
| -rw-r--r-- | src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.stderr | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.stderr b/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.stderr new file mode 100644 index 000000000..b087e03b4 --- /dev/null +++ b/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.stderr @@ -0,0 +1,17 @@ +error: captured variable cannot escape `FnMut` closure body + --> $DIR/regions-return-ref-to-upvar-issue-17403.rs:7:24 + | +LL | let mut x = 0; + | ----- variable defined here +LL | let mut f = || &mut x; + | - ^^^^^- + | | | | + | | | variable captured here + | | returns a reference to a captured variable which escapes the closure body + | inferred to be a `FnMut` closure + | + = note: `FnMut` closures only have access to their captured variables while they are executing... + = note: ...therefore, they cannot allow references to captured variables to escape + +error: aborting due to previous error + |