Merge branch 'kh/mv-breakage'

Demonstrate an assertion failure in 'git mv'.

* kh/mv-breakage:
  t7001: add failure test which triggers assertion

t/t7001-mv.sh

@@ -551,4 +551,16 @@ test_expect_success 'moving nested submodules' '
 	git status
 '
 
+test_expect_failure 'nonsense mv triggers assertion failure and partially updated index' '
+	test_when_finished git reset --hard HEAD &&
+	git reset --hard HEAD &&
+	mkdir -p a &&
+	mkdir -p b &&
+	>a/a.txt &&
+	git add a/a.txt &&
+	test_must_fail git mv a/a.txt a b &&
+	git status --porcelain >actual &&
+	grep "^A[ ]*a/a.txt$" actual
+'
+
 test_done