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-rwxr-xr-xt/t4254-am-corrupt.sh37
1 files changed, 37 insertions, 0 deletions
diff --git a/t/t4254-am-corrupt.sh b/t/t4254-am-corrupt.sh
new file mode 100755
index 0000000000..85716dd6ec
--- /dev/null
+++ b/t/t4254-am-corrupt.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+test_description='git am with corrupt input'
+. ./test-lib.sh
+
+test_expect_success setup '
+ # Note the missing "+++" line:
+ cat >bad-patch.diff <<-\EOF &&
+ From: A U Thor <au.thor@example.com>
+ diff --git a/f b/f
+ index 7898192..6178079 100644
+ --- a/f
+ @@ -1 +1 @@
+ -a
+ +b
+ EOF
+
+ echo a >f &&
+ git add f &&
+ test_tick &&
+ git commit -m initial
+'
+
+# This used to fail before, too, but with a different diagnostic.
+# fatal: unable to write file '(null)' mode 100644: Bad address
+# Also, it had the unwanted side-effect of deleting f.
+test_expect_success 'try to apply corrupted patch' '
+ test_must_fail git am bad-patch.diff 2>actual
+'
+
+test_expect_success 'compare diagnostic; ensure file is still here' '
+ echo "fatal: git diff header lacks filename information (line 4)" >expected &&
+ test_path_is_file f &&
+ test_cmp expected actual
+'
+
+test_done