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adb9332f52
It turns out that when the -F flag was used, if any of the patterns contained a regex meta character (such as `.`), then we winded up escaping the pattern first before handing it off to Aho-Corasick, which treats all patterns literally. We continue to apply band-aides here and just avoid Aho-Corasick if there is an escape in any of the literal patterns. This is unfortunate, but making this work better requires more refactoring, and the right solution is to get this optimization pushed down into the regex engine. Fixes #1334