index-pack: work around thread-unsafe pread()

diff --git a/t/t4104-apply-boundary.sh b/t/t4104-apply-boundary.sh
index 0e3ce3611d9e83ab290ce034f2439961864ce30a..c617c2a33d8e8ac1dc7e049f9056ca6025fbf852 100755 (executable)
--- a/t/t4104-apply-boundary.sh
+++ b/t/t4104-apply-boundary.sh
@@ -134,4 +134,13 @@ test_expect_success 'two lines' '
 
 '
 
+test_expect_success 'apply patch with 3 context lines matching at end' '
+       { echo a; echo b; echo c; echo d; } >file &&
+       git add file &&
+       echo e >>file &&
+       git diff >patch &&
+       >file &&
+       test_must_fail git apply patch
+'
+
 test_done