If something in the provisioning of the vagrant virtual machine goes
wrong the developer might not notice (the creation log is very long),
but the virtual machine will be more or less subtly broken. Instead,
halting on errros makes problems immediately apparent.
Link: https://github.com/ValveSoftware/Proton/pull/4343
Basically the only issue left out is that Python3 is much more picky
on file encoding, and some Valve headers are not UTF-8. Ignoring
errors is enough to get everything fixed.
This way the generated file is more deterministic, and hopefully less
irrelevant diff is produced (for example when switching from Python 2
to Python 3, or when adding more callbacks that cause rehashing the
dictionary).
Giovanni Mascellani