JEP 358 (Helpful NPEs) and single source file mode

[Maurizio Cimadamore]

It occurred to me that jshell is yet another area where we might want to 
turn better NPE messages on by default.

Maurizio

On 19/11/2019 09:24, Maurizio Cimadamore wrote:
> I like this suggestion a lot.
>
> Maurizio
>
> On 19/11/2019 08:34, Gunnar Morling wrote:
>> Hi,
>>
>> I've been exploring the new helpful NPE feature a bit.
>>
>> It's a very welcomed improvement, but I noticed one potential usability
>> issue in conjunction with the single source file mode (JEP 330): as 
>> debug
>> info is missing in that case, e.g. local variables are rendered as
>> "<local1>" in the exception message. Single source file mode also 
>> doesn't
>> let me specify the "-g:vars" option I could use with javac for adding 
>> the
>> debugging info.
>>
>> Perhaps single source file mode should add debug information by 
>> default to
>> prevent this issue?
>>
>> Thanks,
>>
>> --Gunnar