WD php: Exception: DateTime::__construct(): Failed to parse time [31;40m [1m[error] [0m string (@2016/10/04 04:09:37 -0700) at position 5 (/): Unexpected character in DateTime->__construct() (line 34 of /srv/org.wikimedia.civicrm/vendor/wikimedia/smash-pig/Core/UtcDate.php). Exception: DateTime::__construct(): Failed to parse time string (@2016/10/04 04:09:37 -0700) at position 5 (/): Unexpected character in DateTime->__construct() (line 34 of /srv/org.wikimedia.civicrm/vendor/wikimedia/smash-pig/Core/UtcDate.php). Drush command terminated abnormally due to an unrecoverable error. [31;40m [1m[error] [0m Error: DateTime::__construct(): Failed to parse time string (@2016/10/04 04:09:37 -0700) at position 5 (/): Unexpected character
This seems like a regression, but I was unable to find the original bug.
The problem is probably that we're adding the "@"- prefix to trigger PHP's implicit unix timestamp date parse format, but this wasn't a numeric timestamp.