RFR(L): 8218628: Add detailed message to NullPointerException describing what is null.

[Lindenmaier, Goetz]

Hi Mandy,

> Sorry I have been busy on other time-critical things.  I will
> get to it hopefully next week.
No problem, I have been improving the text slightly
anyways.
I also pushed my change and a follow up needed to the sandbox 
repos so it can be played with.

Should I move the JEP to status 'submitted'?

Best regards,
  Goetz




> 
> Mandy
> 
> On 3/15/19 3:55 AM, Lindenmaier, Goetz wrote:
> > Hi everybody, Mark,
> >
> > I followed your advice and created a JEP:
> > https://bugs.openjdk.java.net/browse/JDK-8220715
> >
> > Please point me to things I need to improve formally, this is my first
> > JEP. Also feel free to fix the administrative information in the
> > Jira issue if it is wrong.
> >
> > And, naturally, you're welcome to discuss the topic!
> >
> > Best regards,
> >    Goetz.
> >
> >> -----Original Message-----
> >> From: mark.reinhold at oracle.com <mark.reinhold at oracle.com>
> >> Sent: Donnerstag, 14. März 2019 22:38
> >> To: maurizio.cimadamore at oracle.com; Lindenmaier, Goetz
> >> <goetz.lindenmaier at sap.com>
> >> Cc: mandy.chung at oracle.com; roger.riggs at oracle.com; core-libs-
> >> dev at openjdk.java.net; hotspot-runtime-dev at openjdk.java.net
> >> Subject: Re: RFR(L): 8218628: Add detailed message to NullPointerException
> >> describing what is null.
> >>
> >> 2019/3/14 8:00:20 -0700, maurizio.cimadamore at oracle.com:
> >>> I second what Mandy says.
> >>>
> >>> First let me start by saying that this enhancement will be a great
> >>> addition to our platform; back in the days when I was teaching some Java
> >>> classes at the university, I was very aware of how hard it is to
> >>> diagnose a NPE for someone novel to Java programming.
> >>
> >> Agreed!
> >>
> >>> ...
> >>>
> >>> I also think that the design space for such an enhancement is non
> >>> trivial, and would best be explored (and captured!) in a medium that is
> >>> something other than a patch. ...
> >>
> >> Agreed, also.
> >>
> >> Goetz -- if, per Mandy’s suggestion, you’re going to write something
> >> up using the JEP template, might I suggest that you then submit it as
> >> an actual JEP?  Giving visibility to, and recording, such design-space
> >> explorations is one of the primary goals of the JEP process.
> >>
> >> - Mark