Do not allow attributes on struct field rest patterns

This removes support for attributes on struct field rest patterns (the `..`) from the parser.
Previously they were being parsed but dropped from the AST, so didn't work and were deleted by rustfmt.

2 files changed, 18 insertions, 0 deletions

diff --git a/tests/ui/parser/attribute/attr-pat-struct-rest.rs b/tests/ui/parser/attribute/attr-pat-struct-rest.rs
new file mode 100644
index 00000000000..b2bfcf82df8
--- /dev/null
+++ b/tests/ui/parser/attribute/attr-pat-struct-rest.rs
@@ -0,0 +1,8 @@
+// #81282: Attributes are not allowed on struct field rest patterns (the ..).
+
+struct S {}
+
+fn main() {
+    let S { #[cfg(any())] .. } = S {};
+    //~^ ERROR expected identifier, found `..`
+}
diff --git a/tests/ui/parser/attribute/attr-pat-struct-rest.stderr b/tests/ui/parser/attribute/attr-pat-struct-rest.stderr
new file mode 100644
index 00000000000..f72c54973fc
--- /dev/null
+++ b/tests/ui/parser/attribute/attr-pat-struct-rest.stderr
@@ -0,0 +1,10 @@
+error: expected identifier, found `..`
+  --> $DIR/attr-pat-struct-rest.rs:6:27
+   |
+LL |     let S { #[cfg(any())] .. } = S {};
+   |         -                 ^^ expected identifier
+   |         |
+   |         while parsing the fields for this pattern
+
+error: aborting due to 1 previous error
+