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ac7f0f436e
When update-trees::threeway_merge() decides that a path that exists in the current index (and HEAD) is to be removed, it leaves a stage 0 entry whose mode bits are set to 0. The code mistook it as "this stage wants the blob here", and proceeded to call update_file_flags() which ended up trying to put the mode=0 entry in the index, got very confused, and ended up barfing with "do not know what to do with 000000". Since threeway_merge() does not handle case #10 (one side removes while the other side does not do anything), this is not a problem while we refuse to merge branches that have D/F conflicts, but when we start resolving them, we would need to be able to remove cache entries, and at that point it starts to matter. Signed-off-by: Junio C Hamano <junkio@cox.net>
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