Fixed missing comma in exception

kernel/modelverse_kernel/compiled.py

@@ -414,7 +414,7 @@ def check_symbols(a, b, c, **remainder):
             k = key
             v = value
             if v and symbols.get(k, False):
-                result = yield [("CNV", ["ERROR: multiple definition of symbol " + str(key)])]
+                result, = yield [("CNV", ["ERROR: multiple definition of symbol " + str(key)])]
                 raise PrimitiveFinished(result)
             elif v and not symbols.get(k, False):
                 symbols[k] = True