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2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774320]

Thu, 12 October 2017 15:39

Eclipse User

I can reproduce this on an updated Oxygen, a fresh Eclipse Oxigen 1a with DSL tools, and a 'Java-only' Eclipse Oxygen 1a, in which I install the xtext 2.13 nightly build.

I just create a 'New Xtext' project (with the sample hello-greeting project), then go to the .mwe2 file, and select that as a 'Run As' target. See the attached error that is thrown in the Console.

This also happens with with my older DSL project that compiled fine in Oxygen on Java 8 / XText 2.12.

This is on Windows 10 Pro - 64bit with no Java 8 installs remaining.

See the attached file for the stack-trace.

Attachment: dump.txt
(Size: 14.00KB, Downloaded 313 times)

Re: 2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774321 is a reply to message #1774320]

Thu, 12 October 2017 16:13

Eclipse User

can you please open a issue on github.com/eclipse/xtext-core for investigation

Re: 2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774323 is a reply to message #1774321]

Thu, 12 October 2017 16:29

Eclipse User

likelycaused by old asm

java.lang.IllegalArgumentException
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at org.eclipse.xtext.common.types.access.binary.asm.JvmDeclaredTypeBuilder.buildType(JvmDeclaredTypeBuilder.java:69)
	at org.eclipse.xtext.common.types.access.impl.DeclaredTypeFactory.doCreateType(DeclaredTypeFactory.java:115)
	at org.eclipse.xtext.common.types.access.impl.DeclaredTypeFactory.createType(DeclaredTypeFactory.java:95)

Re: 2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774325 is a reply to message #1774323]

Thu, 12 October 2017 16:40

Eclipse User

workaround: remove asm from the build path (build.properties)

Re: 2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774330 is a reply to message #1774325]

Thu, 12 October 2017 18:35

Eclipse User

https://github.com/eclipse/xtext-core/issues/501

Re: 2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774390 is a reply to message #1774330]

Fri, 13 October 2017 11:19

Eclipse User

Herzlichen dank Christian.

Removing the asm-entry from the build.properties file resulted in a successful compile.

I hope you put this workaround in the release-notes for 2.13, so that people migrating their existing projects to Java9 run into this.

However I got the following warning messages, which you are probably aware of:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.eclipse.xtext.util.MergeableManifest (file:/C:/Users/aart/eclipse/plugins/org.eclipse.xtext.util_2.13.0.v20171005-0628.jar) to field java.util.jar.Manifest.attr
WARNING: Please consider reporting this to the maintainers of org.eclipse.xtext.util.MergeableManifest
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Kind regards,
Aart de Vries

Re: 2.13 nightly build on Oxygen 1a / Java 9 fails to Generate MWE2 [message #1774392 is a reply to message #1774390]

Fri, 13 October 2017 11:34

Eclipse User

yes i saw this. created https://github.com/eclipse/xtext-core/issues/506 so that it does not get forgotten

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