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-rw-r--r--src/test/ui/issues/issue-23966.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-23966.rs b/src/test/ui/issues/issue-23966.rs
new file mode 100644
index 000000000..5fdec28ac
--- /dev/null
+++ b/src/test/ui/issues/issue-23966.rs
@@ -0,0 +1,4 @@
+fn main() {
+ "".chars().fold(|_, _| (), ());
+ //~^ ERROR E0277
+}