The easiest way to find the swift log files is from the file menu:
The path is something like here:
- Then some magic name representing your swift version, like H%3A%2FProjects%2FQtBuilds%2Fbuild-swift-Desktop_Qt_5_11_1_MSVC2017_64bit2-Debug%2Fout%2Fdebug%2Fbin\ + logs
- See also: Find cache and settings files (where swift stores its data)
On MacOS, the Path is '~/Library/Application Support/org.swift-project'
In the launcher you can just go to TOOLS and open the directory there
The crashpad files are located next to the log directory, dmp are most useful file types. See also Crash reports / enable crash dumps.