view rustfmt.toml @ 46654:9ea6b75b4a95

tests: demonstrate a case where a corrupt tag cache causes an abort

I happened to hit this trying to cover other cases around valid vs missing
entries.  I have no idea if this is something that could occur more naturally
(similar to how a missing file node in `hgtagsfnodes1` can occur after a strip).
There is a test just above this added in f5a7cf0adb12 mentioning it "overwrites
the junk", though that tests truncation instead of actual garbage.

But since this is just a cache, it probably shouldn't abort with a cryptic
message like this.  The two options I see both have downsides- either rebuild
the cache (and potentially take a long time), or hint to the user to run a debug
command.

Differential Revision: https://phab.mercurial-scm.org/D9812

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