Eryk Sun <eryk...@gmail.com> added the comment: For extra measure, you may want to normalize `prefix` prior to calculating its length n in gotlandmark(). Then it would be reliable to truncate it via `prefix[n] = '\0'` after joining with `landmark`. Or at least add a comment there or in the calling function, search_for_prefix(), that gotlandmark assumes the current value of `prefix` is a canonical, normalized path.
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