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-rw-r--r--line-range.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/line-range.c b/line-range.c
index 3942475..69e8d6b 100644
--- a/line-range.c
+++ b/line-range.c
@@ -21,11 +21,13 @@ static const char *parse_loc(const char *spec, nth_line_fn_t nth_line,
* for 20 lines, or "-L <something>,-5" for 5 lines ending at
* <something>.
*/
- if (1 < begin && (spec[0] == '+' || spec[0] == '-')) {
+ if (1 <= begin && (spec[0] == '+' || spec[0] == '-')) {
num = strtol(spec + 1, &term, 10);
if (term != spec + 1) {
if (!ret)
return term;
+ if (num == 0)
+ die("-L invalid empty range");
if (spec[0] == '-')
num = 0 - num;
if (0 < num)