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-rw-r--r--degesch.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/degesch.c b/degesch.c
index 30af309..59a5675 100644
--- a/degesch.c
+++ b/degesch.c
@@ -5325,9 +5325,13 @@ mode_processor_do_user (struct mode_processor *self)
|| !(channel_user = irc_channel_get_user (self->channel, user)))
return;
+ // Translate mode character to user prefix character
const char *all_prefixes = self->s->irc_chanuser_prefixes;
const char *all_modes = self->s->irc_chanuser_modes;
- char prefix = all_prefixes[strchr (all_modes, self->mode_char) - all_modes];
+
+ const char *mode = strchr (all_modes, self->mode_char);
+ hard_assert (mode && (size_t) (mode - all_modes) < strlen (all_prefixes));
+ char prefix = all_prefixes[mode - all_modes];
struct str *prefixes = &channel_user->prefixes;
const char *pos = strchr (prefixes->str, prefix);