RFR(L): 8218628: Add detailed message to NullPointerException describing what is null.
goetz.lindenmaier at sap.com
Thu Mar 14 14:58:35 UTC 2019
> Roger, Coleen, Maurizio and I talked about this proposed feature.
> We all think that improving NPE message is a useful enhancement for
> the platform and helps developers to tell what causes NPE.
Thanks for this positive feedback :)!
> This is not a small enhancement. Diving into a large code review
> would not be the best way to move this forward as you can see the
> discussion so far.
> It would help if you can start with writing down the problem and
> the proposal like what improvements are proposed and under what
> circumstances may be acceptable that NPE message won't be improved.
> This would get the discussion on the proposal feature and then
> the discussion of the best way to to implement it in the VM, library,
> or combination. You can consider using the JEP template that gives
> you a good structure to follow for the write up.
Yes, I can write down the overall design of this. This probably is a good
I already started editing, but please give me a day or two.
The past days I have been working on the C-code. I incorporated
Coleens comments, but mostly changed the messages to print
different text as it was proposed in several reviews.
I'm about to publish a webrev with this new coding. This could
be a new, better basis for discussing the wording of the message.
> What do you think?
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