foreach( $stream['comments'] as $name => $value ) {
				$trimmedValue = trim( $value );
				if ( $trimmedValue === '' ) {
					continue;
				}

Did we start allowing/passing/parsing in arrays at some point?

I guess it needs special handling

Change 140641 had a related patch set uploaded by Brian Wolff:
Handle double tags properly (fix php warning about trim())

https://gerrit.wikimedia.org/r/140641

Change 140641 merged by jenkins-bot:
Handle double tags properly (fix php warning about trim())

https://gerrit.wikimedia.org/r/140641

Patch was merged, so assuming bug is fixed.

Please re-open if that's not the case.