Merge pull request rhaiscript#949 from schungx/master

Fix builds

CHANGELOG.md

@@ -1,20 +1,34 @@
 Rhai Release Notes
 ==================
 
+Version 1.21.0
+==============
+
+Bug fixes
+---------
+
+* Fixed bug in raw strings (thanks [`@benatkin`](https://github.com/benatkin) [944](https://github.com/rhaiscript/rhai/pull/944)).
+* `get_fn_metadata_list` function is marked `volatile`.
+* `no-std` plus `sync` should now build correctly (thanks [`stargazing-dino`](https://github.com/stargazing-dino) [947](https://github.com/rhaiscript/rhai/pull/947)).
+
+Enhancements
+------------
+
+* A new `internals` function, `Engine::collect_fn_metadata`, is added to collect all functions metadata. This is to facilitate better error reporting for missing functions (thanks [`therealprof`](https://github.com/therealprof) [945](https://github.com/rhaiscript/rhai/pull/945)).
+
+
 Version 1.20.1
 ==============
 
 Bug fixes
 ---------
 
 * Fixed bug in raw strings with newlines (thanks [`@benatkin`](https://github.com/benatkin) [940](https://github.com/rhaiscript/rhai/pull/940)).
-* `get_fn_metadata_list` function is marked `volatile`.
 
 Enhancements
 ------------
 
 * If a string slice refers to the entire string, the slice is not cloned but returned as-is.
-* A new `internals` function, `Engine::collect_fn_metadata`, is added to collect all functions metadata. This is to facilitate better error reporting for missing functions (thanks [`therealprof`](https://github.com/therealprof) [899](https://github.com/rhaiscript/rhai/issues/899)).
 
 
 Version 1.20.0

src/lib.rs

@@ -93,7 +93,11 @@
 #![allow(clippy::no_effect_underscore_binding)] // Underscored variables may be used by code within feature guards
 #![allow(clippy::semicolon_if_nothing_returned)] // One-liner `match` cases are sometimes formatted as multi-line blocks
 
-#[cfg(feature = "no_std")]
+// TODO: Further audit no_std compatibility
+// When building with no_std + sync features, explicit imports from alloc
+// are needed despite using no_std_compat. This fixed compilation errors
+// in `native.rs` around missing trait implementations for some users.
+//#[cfg(feature = "no_std")]
 extern crate alloc;
 
 #[cfg(feature = "no_std")]