chore: checkpoint before Python removal

vendor/zerocopy-derive/tests/ui/cfgs/on_error.stable.stderr

@@ -0,0 +1,31 @@
+error: `on_error` is experimental; pass '--cfg zerocopy_unstable_derive_on_error' to enable
+  --> $DIR/on_error.rs:13:10
+   |
+13 | #[derive(FromBytes)]
+   |          ^^^^^^^^^
+   |
+   = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0277]: the trait bound `bool: FromBytes` is not satisfied
+  --> $DIR/on_error.rs:13:10
+   |
+13 | #[derive(FromBytes)]
+   |          ^^^^^^^^^ the trait `FromBytes` is not implemented for `bool`
+   |
+   = note: Consider adding `#[derive(FromBytes)]` to `bool`
+   = help: the following other types implement trait `FromBytes`:
+             ()
+             (A, B)
+             (A, B, C)
+             (A, B, C, D)
+             (A, B, C, D, E)
+             (A, B, C, D, E, F)
+             (A, B, C, D, E, F, G)
+             (A, B, C, D, E, F, G, H)
+           and 79 others
+   = help: see issue #48214
+   = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.