problem in unpack-trees.c
From: Roman Zippel <hidden>
Date: 2016-08-11 20:32:33
Hi, Git currently fails to succeed the tests as you can see here: http://buildd.debian.org/fetch.cgi?&pkg=git-core&ver=1%3A1.4.4-2&arch=m68k&stamp=1164303729&file=log I looked into it and the problem is during the "git-read-tree --reset" step and it seems that the local df_conflict_entry variable of unpack_trees() survives past that function. If you check in add_cache_entry() it's called with this variable and only because verify_path() fails it's not added to the tree on the other archs, but on m68k the data on the stack is a bit different and thus verify_path() succeeds and the stack variable is added to the tree and later saved. Using the patch below, you can simulate what's happing on m68k and now I need some help fixing this properly, as I'm not that familiar with the internals. Thanks. bye, Roman diff -ur git-core-1.4.4.1/unpack-trees.c git-core-1.4.4.1/unpack-trees.c
--- git-core-1.4.4.1/unpack-trees.c 2006-11-23 03:38:07.000000000 +0100
+++ git-core-1.4.4.1/unpack-trees.c 2006-12-03 01:54:04.000000000 +0100@@ -370,7 +370,10 @@ int i; struct object_list *posn = trees; struct tree_entry_list df_conflict_list; - struct cache_entry df_conflict_entry; + static struct { + struct cache_entry entry; + char name[4]; + } df_conflict_entry; memset(&df_conflict_list, 0, sizeof(df_conflict_list)); df_conflict_list.next = &df_conflict_list;
@@ -382,7 +385,8 @@ o->merge_size = len; memset(&df_conflict_entry, 0, sizeof(df_conflict_entry)); - o->df_conflict_entry = &df_conflict_entry; + o->df_conflict_entry = &df_conflict_entry.entry; + df_conflict_entry.entry.name[0] = 'x'; if (len) { posns = xmalloc(len * sizeof(struct tree_entry_list *));
@@ -399,6 +403,7 @@ die("Merge requires file-level merging"); check_updates(active_cache, active_nr, o); + memset(&df_conflict_entry, 0x11, sizeof(df_conflict_entry)); return 0; }