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-rw-r--r--diff.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 6da52e0..7a321f4 100644
--- a/diff.c
+++ b/diff.c
@@ -2855,6 +2855,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
;
else if (!prefixcmp(arg, "--output=")) {
options->file = fopen(arg + strlen("--output="), "w");
+ if (!options->file)
+ die_errno("Could not open '%s'", arg + strlen("--output="));
options->close_file = 1;
} else
return 0;