X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fxpress_compress.c;h=1c824a57634520cdd3974e32ef88cfbe47cf7aa6;hp=65c4b026627bdeaf912b29e04cdba435779f7cef;hb=917100f2f08773e5b6c7a479a095b499fab848b8;hpb=3e8aa757aaa63297f0d54007adf46411778fb6a8

diff --git a/src/xpress_compress.c b/src/xpress_compress.c
index 65c4b026..1c824a57 100644
--- a/src/xpress_compress.c
+++ b/src/xpress_compress.c
@@ -1088,6 +1088,13 @@ xpress_create_compressor(size_t max_bufsize, unsigned compression_level,
 			c->impl = xpress_compress_lazy;
 			c->max_search_depth = (compression_level * 24) / 32;
 			c->nice_match_length = (compression_level * 48) / 32;
+
+			/* xpress_compress_lazy() needs max_search_depth >= 2
+			 * because it halves the max_search_depth when
+			 * attempting a lazy match, and max_search_depth cannot
+			 * be 0.  */
+			if (c->max_search_depth < 2)
+				c->max_search_depth = 2;
 		}
 	}
 #if SUPPORT_NEAR_OPTIMAL_PARSING
@@ -1113,6 +1120,10 @@ xpress_create_compressor(size_t max_bufsize, unsigned compression_level,
 	}
 #endif /* SUPPORT_NEAR_OPTIMAL_PARSING */
 
+	/* max_search_depth == 0 is invalid.  */
+	if (c->max_search_depth < 1)
+		c->max_search_depth = 1;
+
 	*c_ret = c;
 	return 0;