Merge branch 'jk/rev-list-no-bitmap-while-pruning' into maint

A minor bugfix when pack bitmap is used with "rev-list --count".

* jk/rev-list-no-bitmap-while-pruning:
  rev-list: disable --use-bitmap-index when pruning commits

Author: gitster

builtin/rev-list.c

@@ -355,7 +355,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 	if (bisect_list)
 		revs.limited = 1;
 
-	if (use_bitmap_index) {
+	if (use_bitmap_index && !revs.prune) {
 		if (revs.count && !revs.left_right && !revs.cherry_mark) {
 			uint32_t commit_count;
 			if (!prepare_bitmap_walk(&revs)) {

t/t5310-pack-bitmaps.sh

@@ -53,6 +53,12 @@ rev_list_tests() {
 		test_cmp expect actual
 	'
 
+	test_expect_success "counting commits with limiting ($state)" '
+		git rev-list --count HEAD -- 1.t >expect &&
+		git rev-list --use-bitmap-index --count HEAD -- 1.t >actual &&
+		test_cmp expect actual
+	'
+
 	test_expect_success "enumerate --objects ($state)" '
 		git rev-list --objects --use-bitmap-index HEAD >tmp &&
 		cut -d" " -f1 <tmp >tmp2 &&