Merge pull request #428 from YoYoGames/gmb-4437-unhandle-exception-fix

Function `exception_unhandled_handler` fixed on HTML5

Author: yoyo-danielc

scripts/_GameMaker.js

@@ -158,8 +158,20 @@ function yyUnhandledExceptionHandler( event )
 		game_end(-1);
 	} // end if
 	else {
-		var ret = g_GMLUnhandledExceptionHandler( undefined, undefined, event.error );
-		game_end( ret );
+        let error = event.error; 
+
+        // Construct a GML struct to encapsulate the error details.
+        let errorStruct = { } 
+        errorStruct.__type = "___struct___"; 
+        errorStruct.__yyIsGMLObject = true; 
+
+        // Add error details to the struct with a "gml" prefix for each member.
+        errorStruct.gmlmessage = error.message;
+        errorStruct.gmlstacktrace = error.stack;
+
+        // Pass the error struct to the custom error handler
+        var ret = g_GMLUnhandledExceptionHandler( undefined, undefined, errorStruct ); 
+        game_end( ret );
 	}
 	debugger;
 	return false;