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Alex Biehl authored
Before we were decoding the whole file to get to the desired line. This patch introduces a fast function which searches a StringBuffer for the desired line so we only need to utf8 decode a little portion. This is especially interesting if we have big modules with lots of warnings. Reviewers: austin, bgamari, Rufflewind, trofi Reviewed By: Rufflewind, trofi Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3440
065be6e9