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, 5 insertions, 0 deletions

diff --git a/vendor/proc-macro-error-attr/build.rs b/vendor/proc-macro-error-attr/build.rs
new file mode 100644
index 000000000..f2ac6a70e
--- /dev/null
+++ b/vendor/proc-macro-error-attr/build.rs
@@ -0,0 +1,5 @@
+fn main() {
+    if version_check::is_max_version("1.36.0").unwrap_or(false) {
+        println!("cargo:rustc-cfg=always_assert_unwind");
+    }
+}