Comment # 5 on bug 109331 from andrew.m.mcmahon@gmail.com

I've used apitrace (DEBUGGER="apitrace32 trace" steam steam://rungameid/10500)
to capture some trace files. 
I'm able to replay them using apitrace replay [file] so I hope others are too. 

I've uploaded a 7z archive containing a "bugged" trace and a "workaround" trace
with their corresponding terminal output:
https://drive.google.com/file/d/1BAQFnrJqujU7dYGQTfheABTRjj-_a8Ys/view?usp=sharing

By complete coincidence the archive happens to be 666MB.
The bugged trace is several gigabytes in size whilst the workaround is a mere
90MB so there must be something funny happening there...