Return and not break, ops

src/backend/core/interpreter/decode.cpp

@@ -328,8 +328,8 @@ void Interpreter::Exec(const Instruction instr) {
           break;
         default:
           panic("Undefined BC COP1 {:02X}", instr.cop_rt());
-        }
-      break;
+      }
+      return;
     }
     regs.cop1.decode(instr);
     break;