commit bf11ce0ed8ce52b06bf5fb9367e7951e447c8c42
from: Stefan Sperling <stsp@stsp.name>
date: Tue Sep 22 22:26:33 2020 UTC

update arraylist's allocated counter only if the allocation succeeds

commit - ab528e220f57a9cc557919a18aca8d39327ad207
commit + bf11ce0ed8ce52b06bf5fb9367e7951e447c8c42
blob - badedfc28278523e489b303c0c470e925bbbabfa
blob + 9aa063040f234dd19ec987202fad2d6f68260079
--- include/diff/arraylist.h
+++ include/diff/arraylist.h
@@ -60,16 +60,17 @@
 		} \
 		if ((ARRAY_LIST).head == NULL \
 		    || (ARRAY_LIST).allocated < (ARRAY_LIST).len + 1) { \
-			(ARRAY_LIST).allocated += \
-				(ARRAY_LIST).alloc_blocksize ? : 8; \
 			(ARRAY_LIST).p = recallocarray((ARRAY_LIST).head, \
 				(ARRAY_LIST).len, \
-				(ARRAY_LIST).allocated, \
+				(ARRAY_LIST).allocated + \
+				(ARRAY_LIST).alloc_blocksize ? : 8, \
 				sizeof(*(ARRAY_LIST).head)); \
 			if ((ARRAY_LIST).p == NULL) { \
 				NEW_ITEM_P = NULL; \
 				break; \
 			} \
+			(ARRAY_LIST).allocated += \
+				(ARRAY_LIST).alloc_blocksize ? : 8; \
 			(ARRAY_LIST).head = (ARRAY_LIST).p; \
 			(ARRAY_LIST).p = NULL; \
 		}; \