Certain exceptions being silently ignored in Postgres 9.3

[koyae]

As an example, http://sqlfiddle.com/#!15/0d145/22 seems to pass through perfectly without displaying exceptions even though triggers should be firing on errors. This caused a good deal of confusion and seems counter-intuitive to the idea that SQLFiddle is meant for sharing test-cases for things like constraints, triggers, etc. making sure things are failing as expected as well as succeeding as expected.

Errors for the statements bubble up just fine on PostgreSQL 9.2.13 and 9.6dev.