1 files changed, 15 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-40510-3.migrate.stderr b/tests/ui/issues/issue-40510-3.migrate.stderr
new file mode 100644
index 000000000..a49475a85
--- /dev/null
+++ b/tests/ui/issues/issue-40510-3.migrate.stderr
@@ -0,0 +1,15 @@
+error: captured variable cannot escape `FnMut` closure body
+  --> $DIR/issue-40510-3.rs:11:9
+   |
+LL |       || {
+   |        - inferred to be a `FnMut` closure
+LL | /         || {
+LL | |             x.push(())
+LL | |         }
+   | |_________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
+   |
+   = 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
+