Better error handling messages.

src/any.rs

@@ -643,7 +643,7 @@ impl Dynamic {
         };
 
         #[cfg(feature = "no_closure")]
-        panic!("'no_closure' feature does not support converting into a shared value");
+        panic!("converting into a shared value is not supported under 'no_closure'");
     }
 
     /// Convert the `Dynamic` value into specific type.
@@ -812,7 +812,7 @@ impl Dynamic {
 
         self.try_cast::<T>().unwrap_or_else(|| {
             panic!(
-                "value is {} and cannot be cast to {}",
+                "cannot cast {} value and to {}",
                 self_type_name,
                 type_name::<T>()
             )

src/module/resolvers/collection.rs

@@ -70,8 +70,13 @@ impl ModuleResolver for ModuleResolversCollection {
         pos: Position,
     ) -> Result<Module, Box<EvalAltResult>> {
         for resolver in self.0.iter() {
-            if let Ok(module) = resolver.resolve(engine, path, pos) {
+            match resolver.resolve(engine, path, pos) {
-                return Ok(module);
+                Ok(module) => return Ok(module),
+                Err(err) => match *err {
+                    EvalAltResult::ErrorModuleNotFound(_, _) => continue,
+                    EvalAltResult::ErrorInModule(_, err, _) => return Err(err),
+                    _ => panic!("ModuleResolver::resolve returns error that is not ErrorModuleNotFound or ErrorInModule"),
+                },
             }
         }