André is right: a marker during reformat would be enough for me.
Perfect. If Andre gets it done shortly then you'll have it for release.
I had not expected that blocking an Oracle compile would even be possible.
It is and we'd have to do very little work to support it. The syntax errors from parser are already known to Editor when you compile so there's no risk to speed/stability. It would just be a matter of showing you the errors allowing you to make corrections or ignore the error and send to Oracle anyway. Usually this is not needed because Oracle will return an ORA error and you know at that time. This case where there is no compile error, but execution error occurs may justify an intervention. Of course there would have to be a "Don't show me this again" option.