istephens@xxxxxxxxxxxxx writes: > diff --git a/line-range.c b/line-range.c > index 323399d16..023aee1f5 100644 > --- a/line-range.c > +++ b/line-range.c > @@ -47,7 +47,7 @@ static const char *parse_loc(const char *spec, nth_line_fn_t nth_line, > else if (!num) > *ret = begin; > else > - *ret = begin + num; > + *ret = begin + num ? begin + num : -1; When parsing "-L<something>,-20" to grab some lines before the line specified by <something>, if that something happens to be line #20, this gives -1 to *ret. If it is line #19, *ret becomes -1, and if it is line #18 or before, *ret becomes -2, -3, ... Is that what we really want here? It is disturbing that only line #19 and #20 are treated identically in the above example. If it were "if going backwards by -num lines from begin goes beyond the beginning of the file, clip it to the first line", I would understand it, but as written, I am not sure what the code is trying to do.
