Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/test/ui/parser/issues/issue-65846-rollback-gating-failing-matcher.rs b/src/test/ui/parser/issues/issue-65846-rollback-gating-failing-matcher.rs
new file mode 100644
index 000000000..76c07bbfd
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-65846-rollback-gating-failing-matcher.rs
@@ -0,0 +1,15 @@
+// run-pass
+
+// Test that failing macro matchers will not cause pre-expansion errors
+// even though they use a feature that is pre-expansion gated.
+
+#[allow(unused_macro_rules)]
+macro_rules! m {
+    ($e:expr) => { 0 }; // This fails on the input below due to `, foo`.
+    ($e:expr,) => { 1 }; // This also fails to match due to `foo`.
+    (box $e:expr, foo) => { 2 }; // Successful matcher, we should get `2`.
+}
+
+fn main() {
+    assert_eq!(2, m!(box 42, foo));
+}