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, 21 insertions, 0 deletions

diff --git a/src/test/ui/proc-macro/derive-helper-legacy-limits.rs b/src/test/ui/proc-macro/derive-helper-legacy-limits.rs
new file mode 100644
index 000000000..ca904900d
--- /dev/null
+++ b/src/test/ui/proc-macro/derive-helper-legacy-limits.rs
@@ -0,0 +1,21 @@
+// Support for legacy derive helpers is limited and heuristic-based
+// (that's exactly the reason why they are deprecated).
+
+// edition:2018
+// aux-build:test-macros.rs
+
+#[macro_use]
+extern crate test_macros;
+
+use derive as my_derive;
+
+#[my_derive(Empty)]
+#[empty_helper] // OK
+struct S1;
+
+// Legacy helper detection doesn't see through `derive` renaming.
+#[empty_helper] //~ ERROR cannot find attribute `empty_helper` in this scope
+#[my_derive(Empty)]
+struct S2;
+
+fn main() {}