Bug ID: JDK-8244639 Enable ShowCodeDetailsInExceptionMessages by default

Type: CSR
Component: hotspot
Sub-Component: runtime

Priority: P4
Status: Closed
Resolution: Approved
Fix Versions: 15

Submitted: 2020-05-08
Updated: 2020-06-17
Resolved: 2020-06-10

Summary
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Enable ShowCodeDetailsInExceptionMessages by default.

Problem
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The flag ShowCodeDetailsInExceptionMessages was introduced with CSR "JDK-8227717
Give more helpful NullPointerException messages and add flag -XX:ShowCodeDetailsInExceptionMessages" 
and toggles the enhancement introduced by "JEP 358: Helpful NullPointerExceptions". So far the default value is 'false', so that the enhancement is off. 

The enhanced NullPointerException messages should be printed per default.

Solution
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Set the flag to 'true'.

Moving to Approved. The security review came back as fine, as long as a release note was included for this change warning of the exposure of more information. I've put text from the security review team in a release note subtask on the main issue; please edit accordingly. Personally, I'd feel more comfortable if this change went it at the start of 16; if that comes to pass for some reason, update the CSR for the new release and I'll re-approve it.
10-06-2020
I've pinged the engineers responsible for performing the security review.
04-06-2020
I've requested a security review of changing the default of this option. I'm moving to request to pended while that review is outstanding.
15-05-2020
This seems fine to me. Reviewed.
08-05-2020
The CSR request should remain in Draft until it has Reviewers. Once it has a Reviewer it can be Finalized (fast-track process) rather than Proposed.
08-05-2020

CSR :	JDK-8233014 - Enable ShowCodeDetailsInExceptionMessages by default
Relates :	JDK-8227717 - Give more helpful NullPointerException messages and add flag -XX:ShowCodeDetailsInExceptionMessages
Relates :	JDK-8247371 - Release Note: Enable ShowCodeDetailsInExceptionMessages by default