Finished part 1 of the Wayland McWayface tutorial of Drew DeVault - Issue with spi toolprovider interface and jextract

[Maurizio Cimadamore]

That doesn't look good.

I suggest you try to Java-ize your example and try again. If that works, 
then we're looking at an issue which could be caused by some 
incompatibility between sbt and the Panama JDK (e.g. does sbt support 
classfiles of that version number?) or, possibly, some more obscure bug 
in the Panama JDK.

Maurizio

On 25/02/2019 20:51, Mark Hammons wrote:
> I gave it a shot, and changed my setProperty to a getProperty to make 
> sure the debug flag was set and still no helpful debug information. 
> This gets printed out whenever I run sbt, so maybe it's related?
>
> error: error while loading String, class file 
> '/modules/java.base/java/lang/String.class' is broken
> (class java.lang.NullPointerException/null)
>
> On 2/25/19 3:11 PM, Mark Hammons wrote:
>> I will do this when I return home tonight.
>>
>> On 25/02/2019 12:37, Maurizio Cimadamore wrote:
>>>
>>> On 25/02/2019 00:40, Mark Hammons wrote:
>>>> So at least I know the command is failing, but still no output as 
>>>> to why. 
>>>
>>> Error code 4 means jextract failed with some runtime exception - but 
>>> the "jextract.debug" option should print the exception message:
>>>
>>> ```
>>> ctx.err.println(re.getMessage());
>>> if (Main.DEBUG) {
>>>   re.printStackTrace(ctx.err);
>>> }
>>> return RUNTIME_ERROR;
>>> ```
>>>
>>> I'm not sure setting the property the way you do is the right way to 
>>> go. The property is cached in a static field:
>>>
>>> ```
>>> public static final boolean DEBUG = 
>>> Boolean.getBoolean("jextract.debug");
>>> ```
>>>
>>> So you are basically depending on the order in which classes are 
>>> loaded/initialized here. Can you try to pass -Djextract.debug to the 
>>> VM directly instead of doing it from the program? (not 100% sure 
>>> that is why you are getting no output, but let's try to remove as 
>>> many accidental factors as possible).
>>>
>>>
>>> Maurizio
>>>
>>>
>>>
>>