Coalesce component wont use value column from Convert to string transformer

[LosD]

A way to get a default value for a column, is to create a value column in a Convert to string transformer, and use that as the second input for a coalescing. However, it seems that in 5.1.4, that has been broken somehow, so that it ends up with a <null>, even though the preview shows that the input it fine:

This does not seem to affect other component, so a workaround is to get a JavaScript transformer to provide the value.

This was not a problem in 5.1.3

[LosD]

Just found another workaround: If the convert to string component is attached to any column from the input file, things works again.

It seems like one of our changes might have done some over-optimization that nukes the output.