QtCreator crashes when editing GLSL files with error underlines

Crashes when editing GLSL files. Always seems to happen when error underlines are shown.

Steps to reproduce:

1. Open any GLSL file ( sample: https://pastebin.com/raw/fWnQ9Qg2 )
2. Start typing up a function, vec4 myfunc()
3. Give it an empty function body {\n}, needs this to crash
4. Type this between paranthesis: "bla, bla,": myfunc(bla, bla,)
5. Backspace the comma, and QtCreator will crash