The bug

When a loot table is evaluated and attempts to drop a nonexistent item, you get the following content log warning:

[Item][error]-<itemname> is not a valid item name. 

However, when a loot table is evaluated and attempts to drop a nonexistent loot table, there is no warning. You just get no drops.

How to reproduce

1. Download the attached world
2. Kill the pig

Expected result

Content log warning

Actual result

Nothing

Notes

Fixing this should cause vanilla to produce such an error due to MCPE-57215