line-range: reject -L line numbers less than 1
Since inception, git-blame -L has been documented as accepting 1-based
line numbers. When handed a line number less than 1, -L's behavior is
undocumented and undefined; it's also nonsensical and should be
diagnosed as an error. Do so.
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/line-range.c b/line-range.c
index ede0c6c..de4e32f 100644
--- a/line-range.c
+++ b/line-range.c
@@ -54,8 +54,11 @@
}
num = strtol(spec, &term, 10);
if (term != spec) {
- if (ret)
+ if (ret) {
+ if (num <= 0)
+ die("-L invalid line number: %ld", num);
*ret = num;
+ }
return term;
}
diff --git a/t/annotate-tests.sh b/t/annotate-tests.sh
index 376b042..99caa42 100644
--- a/t/annotate-tests.sh
+++ b/t/annotate-tests.sh
@@ -185,15 +185,15 @@
check_count -L6,3 B 1 B1 1 B2 1 D 1
'
-test_expect_failure 'blame -L -X' '
+test_expect_success 'blame -L -X' '
test_must_fail $PROG -L-1 file
'
-test_expect_failure 'blame -L 0' '
+test_expect_success 'blame -L 0' '
test_must_fail $PROG -L0 file
'
-test_expect_failure 'blame -L ,0' '
+test_expect_success 'blame -L ,0' '
test_must_fail $PROG -L,0 file
'
@@ -447,8 +447,8 @@
check_count -h HEAD^^ -f incremental
'
-test_expect_success 'blame -L 0 empty (undocumented)' '
- check_count -h HEAD^^ -f incremental -L0
+test_expect_success 'blame -L 0 empty' '
+ test_must_fail $PROG -L0 incremental HEAD^^
'
test_expect_success 'blame -L 1 empty' '
@@ -463,8 +463,8 @@
check_count -h HEAD^ -f incremental I 1
'
-test_expect_success 'blame -L 0 half (undocumented)' '
- check_count -h HEAD^ -f incremental -L0 I 1
+test_expect_success 'blame -L 0 half' '
+ test_must_fail $PROG -L0 incremental HEAD^
'
test_expect_success 'blame -L 1 half' '
@@ -483,8 +483,8 @@
check_count -f incremental I 1
'
-test_expect_success 'blame -L 0 full (undocumented)' '
- check_count -f incremental -L0 I 1
+test_expect_success 'blame -L 0 full' '
+ test_must_fail $PROG -L0 incremental
'
test_expect_success 'blame -L 1 full' '
