This affects commands like /teleport. For example:

1. Kill all pigs:

   /kill @e[type=pig]
   

2. Run

   /teleport @e[type=chicken,limit=1] @e[type=pig,limit=1]
   

3. "No entity was found" is printed in chat

However, from the error message it is not clear which selector found no entities. The error message should print the entity selector with it to fix this issue, like it did in 1.12.2.