Fix builds.

CHANGELOG.md

@@ -24,6 +24,7 @@ Potentially breaking changes
 Enhancements
 ------------
 
+* `Engine::new_raw` is now `const` and runs very fast, delaying all other initialization until first use.
 * The functions `min` and `max` are added for numbers.
 * Range cases in `switch` statements now also match floating-point and decimal values. In order to support this, however, small numeric ranges cases are no longer unrolled.
 * Loading a module via `import` now gives the module access to the current scope, including variables and constants defined inside.

src/engine.rs

@@ -326,7 +326,11 @@ impl Engine {
         &self,
         string: impl AsRef<str> + Into<ImmutableString>,
     ) -> ImmutableString {
-        locked_write(&self.interned_strings).get(string)
+        if let Some(ref interner) = self.interned_strings {
+            locked_write(interner).get(string)
+        } else {
+            string.into()
+        }
     }
 
     /// _(internals)_ Get an interned [string][ImmutableString].