RFR (S) 8144518: ClassVerboseTest crashes on Windows

[Kim Barrett]

> On Jan 17, 2017, at 9:57 PM, David Holmes <david.holmes at oracle.com> wrote:
> 
> Hi Coleen,
> 
> On 18/01/2017 12:13 PM, Coleen Phillimore wrote:
>> 
>> 
>> On 1/17/17 7:02 PM, David Holmes wrote:
>>> Hi Coleen,
>>> 
>>> The bug report does not explain the problem so it is unclear whether
>>> this workaround is minimal. Also some commentary somewhere would be
>>> useful else the bug might return inadvertently - more generally I'd
>>> like to understand what other code might be impacted by this.
>> 
>> Christian and I spent a solid week looking for the windows Visual Studio
>> bug that caused this but weren't able to find it.  He verified that it's
>> fixed in VS2015.  I think that's in the bug report.  The code generated
>> is in the bug report with annotations of what lines the code it was
>> executing and which instructions caused the truncation and sign
>> extension leading to a negative offset from the start of _bcp.
> 
> I'm not seeing that listing in the bug report. What code was generated versus what code should have been generated is precisely what I was looking for. And some idea of what problematic source code looks like.

Some (most?) of the analysis and reproducer that Coleen is referring to are over in the duplicate 
https://bugs.openjdk.java.net/browse/JDK-8171968