Michael Haggerty 01caf20d57 load_contents(): don't try to mmap an empty file ... We don't actually create zero-length `packed-refs` files, but they are valid and we should handle them correctly. The old code `xmmap()`ed such files, which led to an error when `munmap()` was called. So, if the `packed-refs` file is empty, leave the snapshot at its zero values and return 0 without trying to read or mmap the file. Returning 0 also makes `create_snapshot()` exit early, which avoids the technically undefined comparison `NULL < NULL`. Reported-by: Kim Gybels <kgybels@infogroep.be> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2018-01-24 12:55:26 -08:00
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files-backend.c	Merge branch 'mh/avoid-rewriting-packed-refs' into maint	2017-12-06 09:08:50 -08:00
iterator.c	prefix_ref_iterator: break when we leave the prefix	2017-09-14 15:19:07 +09:00
packed-backend.c	load_contents(): don't try to mmap an empty file	2018-01-24 12:55:26 -08:00
packed-backend.h	files-backend: don't rewrite the packed-refs file unnecessarily	2017-10-30 09:45:15 +09:00
ref-cache.c	ref_cache: remove support for storing peeled values	2017-09-25 18:02:46 +09:00
ref-cache.h	ref_cache: remove support for storing peeled values	2017-09-25 18:02:46 +09:00
refs-internal.h	Merge branch 'mh/mmap-packed-refs'	2017-10-03 15:42:50 +09:00