Summary: It's possible for an instance of the visual studio debugger
to return a NoneType line number location when stepping during a
debugging session.
This patches teaches DexTer how to handle this particular case without
crashing out.
Reviewers: Orlando
Differential revision: https://reviews.llvm.org/D75992
This reverts commit cb935f345683194e42e6e883d79c5a16479acd74.
Discussion in D68708 advises that green dragon is being briskly
refurbished, and it's good to have this patch up testing it.
Dexter (Debug Experience Tester) is a test-driver for our debug info
integration tests, reading a set of debug experience expectations and
comparing them with the actual behaviour of a program under a debugger.
More about Dexter can be found in the RFC:
http://lists.llvm.org/pipermail/llvm-dev/2019-October/135773.html
and the phab review in D68708. Not all the debuginfo tests have been
transformed into Dexter tests, and we look forwards to doing that
incrementally.
This commit mostly aims to flush out buildbots that are running
debuginfo-tests but don't have python 3 installed, possibly
green-dragon and some windows bots.
