java.nio.file.InvalidPathException: Illegal char <:> at index 2: while starting GWT-Unit tests on windows machine

[TabakMann]

Hello,

i have tried to start a gwt unit tests in Eclipse (with launch configuration) on windows machine. It results with an exception (The problem is an leading slash in a path.):

Exception in thread "Thread-1" java.nio.file.InvalidPathException: Illegal char <:> at index 2: /C:/eclipse-neon/configuration/org.eclipse.osgi/390/0/.cp/
	at sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:182)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
	at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
	at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)
	at java.nio.file.Paths.get(Paths.java:84)
	at com.google.gwt.dev.cfg.ResourceLoaders$ContextClassLoaderAdapter.getClassPath(ResourceLoaders.java:62)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.addAllClassPathEntries(ResourceOracleImpl.java:315)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.getAllClassPathEntries(ResourceOracleImpl.java:353)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.preload(ResourceOracleImpl.java:216)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.preload(ResourceOracleImpl.java:207)
	at com.google.gwt.dev.DevMode$1.run(DevMode.java:539)
	at java.lang.Thread.run(Thread.java:745)

Version: GWT 2.8.2
IDE: Eclipse neon for windows

I hope for fast fix for this problem or any suggestion how to avoid it.

thanks

[niloc132]

It appears that this only happens when running the tests from inside of eclipse - the IDE (or the gwt eclipse plugin) erroneously adds the /C:/... directory, not GWT.

This might be more appropriately filed at https://github.com/gwt-plugins/gwt-eclipse-plugin - @branflake2267 can you offer any perspective here?

[abika]

I have the same issue not when running a test in Eclipse but when executing a gwt-test-utils test as a gradle task with
./gradlew.bat :cleanTest :test --tests "com.company.gwt.GWTTestUtilsTest"

and only with GWT 2.8.2 not with 2.8.1 (and only on Windows).

Stack trace (upper part is identical to stack trace in OPs post):

java.nio.file.InvalidPathException: Illegal char <:> at index 2: /F:/.gradle/caches/4.10.1/workerMain/gradle-worker.jar
	at sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:182)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
	at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
	at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)
	at java.nio.file.Paths.get(Paths.java:84)
	at com.google.gwt.dev.cfg.ResourceLoaders$ContextClassLoaderAdapter.getClassPath(ResourceLoaders.java:62)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.addAllClassPathEntries(ResourceOracleImpl.java:315)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.getAllClassPathEntries(ResourceOracleImpl.java:353)
	at com.google.gwt.dev.resource.impl.ResourceOracleImpl.<init>(ResourceOracleImpl.java:387)
	at com.google.gwt.dev.cfg.ModuleDef.normalize(ModuleDef.java:678)
	at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:200)
	at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:170)
	at com.google.gwt.dev.cfg.ModuleDefLoader.createSyntheticModule(ModuleDefLoader.java:100)
	at com.googlecode.gwt.test.internal.GwtFactory.createModuleDef(GwtFactory.java:165)
	at com.googlecode.gwt.test.internal.GwtFactory.<init>(GwtFactory.java:118)
	at com.googlecode.gwt.test.internal.GwtFactory.initializeIfNeeded(GwtFactory.java:54)
	at com.googlecode.gwt.test.internal.junit.AbstractGwtRunner.<init>(AbstractGwtRunner.java:27)
	at com.googlecode.gwt.test.GwtRunner.<init>(GwtRunner.java:18)
	at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:29)
	at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21)
	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
	at java.lang.Thread.run(Thread.java:748)

See gwt-test-utils/gwt-test-utils#87 already linked above.