read-tree -m: make error message for merging 0 trees less smart aleck

diff --git a/t/t4062-diff-pickaxe.sh b/t/t4062-diff-pickaxe.sh
index f0bf50bda780f04f9f2ffc2c1f39e354f69ae193..7c4903f49713a22d7fba28a608acf07f1330110b 100755 (executable)
--- a/t/t4062-diff-pickaxe.sh
+++ b/t/t4062-diff-pickaxe.sh
@@ -19,4 +19,9 @@ test_expect_success '-G matches' '
        test 4096-zeroes.txt = "$(cat out)"
 '
 
+test_expect_success '-S --pickaxe-regex' '
+       git diff --name-only -S0 --pickaxe-regex HEAD^ >out &&
+       verbose test 4096-zeroes.txt = "$(cat out)"
+'
+
 test_done