Previously compiled project is run on F5 if current compilation is unsuccessful.

Steps to reproduce:

• Open a project and compile it successfully.
• Change something in the sources so that there would be some syntax or linking errors.
• Select Build → Run or Debug → Start Debugging → Start Debugging.
• The building will fail but Qt Creator will anyway start the last successful version of the application.

Expected behaviour:

The Qt Creator should not start the application, the developer needs to analyze the errors, correct them and build the application again. If this behaviour is treated as a feature, not a bug, then it would be nice to have an option to disable this.