column: release strbuf and string_list after use

Releasing strbuf and string_list just before exiting is not strictly
necessary, but it gets rid of false positives reported by leak checkers,
which can then be more easily used to show that the column-printing
machinery behind print_columns() are free of leaks.

Signed-off-by: René Scharfe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: rscharfe

builtin/column.c

@@ -55,5 +55,7 @@ int cmd_column(int argc, const char **argv, const char *prefix)
 		string_list_append(&list, sb.buf);
 
 	print_columns(&list, colopts, &copts);
+	strbuf_release(&sb);
+	string_list_clear(&list, 0);
 	return 0;
 }

t/t9002-column.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 test_description='git column'
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '