88ae246593
Summary:
This algorithm is tricky, and uses `phutil_safe_html()` directly, which makes it potentially unsafe.
In particular, D8859 fixes a bug with it which caused it to produce non-utf8 output. This doesn't guarantee it's a security problem, but does make it suspicious.
I don't actually see a way to break it, but rewrite it so that it's absolutely bulletproof and does not need to call `phutil_safe_html()`.
Test Plan:
{F147487}
@rugabarbo, if you have a chance, can you check if this still works for you?
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley, rugabarbo
Differential Revision: https://secure.phabricator.com/D8862
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