res_calendar_icalendar: Print iCalendar error on parsing failure.

If libical fails to parse a calendar, print the error message it provdes.

Resolves: #492
(cherry picked from commit ef891529facf373db73ff9820210235eb29f9bb9)

diff --git a/res/res_calendar_icalendar.c b/res/res_calendar_icalendar.c
index 29be671d359b40285bf1bdeccc94b6e0b0e8016d..95790e5d0843d85c675683a2dfdb9b6a8cb6d8f4 100644 (file)
--- a/res/res_calendar_icalendar.c
+++ b/res/res_calendar_icalendar.c
@@ -155,6 +155,10 @@ static icalcomponent *fetch_icalendar(struct icalendar_pvt *pvt)
 
        if (!ast_strlen_zero(ast_str_buffer(response))) {
                comp = icalparser_parse_string(ast_str_buffer(response));
+               if (!comp) {
+                       ast_debug(3, "iCalendar response data: %s\n", ast_str_buffer(response));
+                       ast_log(LOG_WARNING, "Failed to parse iCalendar data: %s\n", icalerror_perror());
+               }
        }
        ast_free(response);