variations in code coverage

[Tilman Hausherr]

I've been wondering why the code coverage changes from time to time, 
like this:

The reasons are not the current problems, it is something with the 
preflight subproject, and it happens when the host changes, i.e. that 
the build starts clean. I'm not researching this further at this time 
but wanted to share the very few things I found out.

Tilman

PS: our reported code coverage has increased from 45.6 to now 48.1 in 
six months. I'd wish this number to be >50. (Our real code coverage is 
higher, but each subproject is counted separately)