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Reading the index into an empty file has been broken by 5a56da58 , since it causes the existing index to always be loaded first, and dies if it's an empty file: $ GIT_INDEX_FILE=`mktemp` git read-tree master fatal: index file smaller than expected It breaks for instance committing from git.el. This patch reverts to the previous behavior of only loading the index when merging it. Signed-off-by: Alexandre Julliard <julliard@winehq.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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