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Imagine you want to grep for (. Easy: $ git grep '(' fatal: unmatched parenthesis uhoh. This is plainly wrong. Unless you know specifically that (a) git grep has expression groups and '(' ... ')' are used for them. (b) you can use -e '(' to explicitly say '(' is what you are looking for, not the beginning of a group. Similarly, $ git grep ')' fatal: incomplete pattern expression: ) is somehow worse. ")" is a complete regular expression pattern. Of course, the error wants to say "group" here. In this case it is also not "incomplete", it is unmatched. Make them say $ ./git grep '(' fatal: unmatched ( for expression group $ ./git grep ')' fatal: incomplete pattern expression group: ) which are clearer in indicating that it is not the expression that is wrong (since no pattern had been parsed at all), but rather that it is been misconstrued as a grouping operator. Link: https://bugs.debian.org/1051205 Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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