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-rw-r--r--diff-lib.c3
-rwxr-xr-xt/t4040-whitespace-status.sh7
2 files changed, 9 insertions, 1 deletions
diff --git a/diff-lib.c b/diff-lib.c
index 1e22992..2870de4 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -103,7 +103,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
unsigned dirty_submodule = 0;
if (DIFF_OPT_TST(&revs->diffopt, QUICK) &&
- DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES))
+ !revs->diffopt.filter &&
+ DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES))
break;
if (!ce_path_match(ce, &revs->prune_data))
diff --git a/t/t4040-whitespace-status.sh b/t/t4040-whitespace-status.sh
index a30b03b..abc4934 100755
--- a/t/t4040-whitespace-status.sh
+++ b/t/t4040-whitespace-status.sh
@@ -60,4 +60,11 @@ test_expect_success 'diff-files -b -p --exit-code' '
git diff-files -b -p --exit-code
'
+test_expect_success 'diff-files --diff-filter --quiet' '
+ git reset --hard &&
+ rm a/d &&
+ echo x >>b/e &&
+ test_must_fail git diff-files --diff-filter=M --quiet
+'
+
test_done