I discovered that some CMake errors would just open an empty editor whenever I double clicked on it. It turns out that this happens whenever the error is reported with a relative path because this path is interpreted relative to the build dir and not the source dir:

CMake Error at foo/bar/CMakeLists.txt:27 (target_link_librariess):
  Unknown CMake command "target_link_librariess".

This will open foo/bar/CMakeLists.txt in the build dir which doesn't exist so I get an empty editor instead.

Should be an easy fix but I couldn't find the outputview file opening code in a quick search.

Reproducible: Always