Links in Index of Qt help file not working anymore since Qt 5.15.0

[c72578]

The links in the Index of the Qt online-help file are not working any more since Qt 5.15.0.
Using previous versions of Qt like 5.14.1 or 5.14.2, the index works properly.

Test builds of cppcheck, which show the behavior depending on the Qt version are attached here.

How to reproduce:

• Start cppcheckgui.exe
• Press F1 to open the help file
• Click on Index
• Double click on the index entries, e.g. on "Error" or "Project"

Results

• Working, when cppcheck is built against Qt 5.14.1 or 5.14.2. The linked pages are shown.
• Not working, when built against Qt 5.15.0 or 5.15.1

Cppcheck_2.2.99_Qt_5.14.1.zip
Cppcheck_2.2.99_Qt_5.14.2.zip
Cppcheck_2.2.99_Qt_5.15.0.zip
Cppcheck_2.2.99_Qt_5.15.1.zip

[c72578]

Upstream bug reported:
https://bugreports.qt.io/browse/QTBUG-88342

[c72578]

The issue has been fixed in Qt 5.15.2
Test build, where the index of the Qt help file is working properly again:
Cppcheck_2.2.99_Qt_5.15.2.zip
Corresponding installer from GitHub Actions test build:
https://github.com/c72578/cppcheck/actions/runs/375510391