1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/parser/range-inclusive-extra-equals.rs b/src/test/ui/parser/range-inclusive-extra-equals.rs
new file mode 100644
index 000000000..d41c0699c
--- /dev/null
+++ b/src/test/ui/parser/range-inclusive-extra-equals.rs
@@ -0,0 +1,10 @@
+// Makes sure that a helpful message is shown when someone mistypes
+// an inclusive range as `..==` rather than `..=`. This is an
+// easy mistake, because of the resemblance to`==`.
+// See #86395 for a bit of background.
+
+pub fn main() {
+    if let 1..==3 = 1 {} //~ERROR unexpected `=` after inclusive range
+                      //~|HELP use `..=` instead
+                      //~|NOTE inclusive ranges end with a single equals sign
+}