X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Flookup_table.c;h=3d66ca18246be543cb63037d34af60989a0cb1f8;hp=142e7e0472f046cb8708faca88e61451d9b28c62;hb=79b64b516e5bdb486832f88788362dbe9deb1b61;hpb=f9a65bc36b0c82a7c46feec9140129fd5110289c

diff --git a/src/lookup_table.c b/src/lookup_table.c
index 142e7e04..3d66ca18 100644
--- a/src/lookup_table.c
+++ b/src/lookup_table.c
@@ -332,8 +332,15 @@ int read_lookup_table(WIMStruct *w)
 			goto out_free_cur_entry;
 		}
 
+		/* Ordinarily, no two streams should share the same SHA1 message
+		 * digest.  However, this constraint can be broken for metadata
+		 * resources--- two identical images will have the same metadata
+		 * resource, but their lookup table entries are not shared. */
 		duplicate_entry = __lookup_resource(table, cur_entry->hash);
-		if (duplicate_entry) {
+		if (duplicate_entry
+		    && !((duplicate_entry->resource_entry.flags & WIM_RESHDR_FLAG_METADATA)
+			  && cur_entry->resource_entry.flags & WIM_RESHDR_FLAG_METADATA))
+		{
 			ERROR("The WIM lookup table contains two entries with the "
 			      "same SHA1 message digest!");
 			ERROR("The first entry is:");