Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 13 insertions, 0 deletions

diff --git a/third_party/rust/serde_json/src/features_check/mod.rs b/third_party/rust/serde_json/src/features_check/mod.rs
new file mode 100644
index 0000000000..d12032cef8
--- /dev/null
+++ b/third_party/rust/serde_json/src/features_check/mod.rs
@@ -0,0 +1,13 @@
+//! Shows a user-friendly compiler error on incompatible selected features.
+
+#[allow(unused_macros)]
+macro_rules! hide_from_rustfmt {
+    ($mod:item) => {
+        $mod
+    };
+}
+
+#[cfg(not(any(feature = "std", feature = "alloc")))]
+hide_from_rustfmt! {
+    mod error;
+}