diff --git a/src/test/ui/parser/issue-63116.rs b/src/test/ui/parser/issue-63116.rs
new file mode 100644
index 0000000000000..430bc1d716c91
--- /dev/null
+++ b/src/test/ui/parser/issue-63116.rs
@@ -0,0 +1,3 @@
+// fixed by #66361
+// error-pattern: aborting due to 3 previous errors
+impl W <s(f;Y(;]
diff --git a/src/test/ui/parser/issue-63116.stderr b/src/test/ui/parser/issue-63116.stderr
new file mode 100644
index 0000000000000..0aed0386a907b
--- /dev/null
+++ b/src/test/ui/parser/issue-63116.stderr
@@ -0,0 +1,24 @@
+error: this file contains an un-closed delimiter
+  --> $DIR/issue-63116.rs:3:18
+   |
+LL | impl W <s(f;Y(;]
+   |          -       ^
+   |          |
+   |          un-closed delimiter
+
+error: expected one of `!`, `(`, `)`, `+`, `,`, `::`, or `<`, found `;`
+  --> $DIR/issue-63116.rs:3:12
+   |
+LL | impl W <s(f;Y(;]
+   |            ^ expected one of 7 possible tokens
+
+error: expected one of `!`, `&&`, `&`, `(`, `)`, `*`, `+`, `,`, `->`, `...`, `::`, `<`, `>`, `?`, `[`, `_`, `dyn`, `extern`, `fn`, `for`, `impl`, `unsafe`, or lifetime, found `;`
+  --> $DIR/issue-63116.rs:3:15
+   |
+LL | impl W <s(f;Y(;]
+   |              -^ help: `)` may belong here
+   |              |
+   |              unclosed delimiter
+
+error: aborting due to 3 previous errors
+