In https://github.com/ruby/prism/pull/3494 I added a bit of code
so that using the new builder doesn't break stuff.
This code can be dropped when it is enforced that builder
is _always_ the correct subclass (and makes future issues like that unlikely).
193d4b806d
Of course, these won't really be fixtures, but it allows to test against whole codebases
without copying them, doing symlinks or something like that.
For example, I can tell that over the whole RuboCop codebase, there are only 8 files that produce mismatched ast.
Telling what the problem is is a different problem. The ast for real files can and will be huge so I haven't checked yet
(maybe parser bug) but it's nice for discoverability regardless
2184d82ba6
