[PATCH] tag: error when git-column fails

["Rubén Justo" <rjusto@gmail.com>]

If the user asks for the list of tags to be displayed in columns
("--columns"), a child git-column process is used to format the output
as expected.

In a rare situation where we encounter a problem spawning that child
process, we will work erroneously.

Make noticeable we're having a problem executing git-column, so the user
can act accordingly.

Signed-off-by: Rubén Justo <rjusto@gmail.com>
---
 builtin/tag.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/builtin/tag.c b/builtin/tag.c
index 37473ac21f..19a7e06bf4 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -530,7 +530,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 			struct column_options copts;
 			memset(&copts, 0, sizeof(copts));
 			copts.padding = 2;
-			run_column_filter(colopts, &copts);
+			if (run_column_filter(colopts, &copts))
+				die(_("could not start 'git column'"));
 		}
 		filter.name_patterns = argv;
 		ret = list_tags(&filter, sorting, &format);
-- 
2.43.0