"Assertion failed: locale data for current locale must exist" when trying to use systemLocale

[Colin Bartolome]

For some reason, when I'm in Windows, I get this error when I try to use ceylon.locale::systemLocale:

Exception in thread "main" ceylon.language.AssertionError "Assertion failed: locale data for current locale must exist
    violated exists systemLocaleCache"
    at ceylon.locale.systemLocale_.get_(Locale.ceylon:187)
    at localeTest.run_.run(run.ceylon:8)
    at localeTest.run_.main(run.ceylon)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at ceylon.modules.api.runtime.SecurityActions.invokeRunInternal(SecurityActions.java:57)
    at ceylon.modules.api.runtime.SecurityActions.invokeRun(SecurityActions.java:48)
    at ceylon.modules.api.runtime.AbstractRuntime.invokeRun(AbstractRuntime.java:68)
    at ceylon.modules.api.runtime.AbstractRuntime.execute(AbstractRuntime.java:105)
    at ceylon.modules.api.runtime.AbstractRuntime.execute(AbstractRuntime.java:101)
    at ceylon.modules.Main.execute(Main.java:69)
    at ceylon.modules.Main.main(Main.java:42)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.jboss.modules.Module.run(Module.java:308)
    at org.jboss.modules.Main.main(Main.java:487)
    at ceylon.modules.bootstrap.CeylonRunTool.run(CeylonRunTool.java:355)
    at com.redhat.ceylon.common.tools.CeylonTool.run(CeylonTool.java:547)
    at com.redhat.ceylon.common.tools.CeylonTool.execute(CeylonTool.java:423)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.redhat.ceylon.launcher.Launcher.runInJava7Checked(Launcher.java:108)
    at com.redhat.ceylon.launcher.Launcher.run(Launcher.java:38)
    at com.redhat.ceylon.launcher.Launcher.run(Launcher.java:31)
    at com.redhat.ceylon.launcher.Launcher.main(Launcher.java:24)

When I print system.locale, it shows my locale as en-US. This error doesn't happen on my other computer, which is running Linux. Anybody else run into this before?


[Gavin King]

I've never seen that, and I don't have a Windows box here to test, but
I just improved the message from that assertion failure, to make it
easier to troubleshoot:

https://github.com/ceylon/ceylon-sdk/commit/6bc538e59d72cc006dc33bfc41c88f76c8907cc8

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[Colin Bartolome]

I think I figured out what's causing the problem. In com.redhat.ceylon.compiler.java.runtime.metamodel.decl.ModuleImpl.resourceByPath(), there's this line:

fullPath = JVMModuleUtil.quoteJavaKeywordsInFilename(fullPath);

That variable is "ceylon/locale/en-US.txt" before that line and "ceylon\\locale\\en-US.txt" after that line. A few lines down, that value is passed to RuntimeModuleLoader.getContents(), which eventually passes it to CachedTOCJar.containsFile(). That last method checks to see if the given path is in the CachedTOCJar.contents set. That set contains a list of paths that use forward slashes as the separator, so the check always fails.

As far as I can tell, JVMModuleUtil.quoteJavaKaywordsInFilename() is used in one other place and that place does this:

            String quotedFileName = JVMModuleUtil.quoteJavaKeywordsInFilename(fileName);
            String entryName = handleResourceRoot(quotedFileName.replace(File.separatorChar, '/'));

Should JVMModuleUtil.quoteJavaKaywordsInFilename() just always use forward slashes?

[Tako Schotanus]

Perhaps, but at least it should leave the slashes alone IMO.

-Tako

[Colin Bartolome]

Now that I look again, it's because the path is converted to a File object, so it's not quite as simple as using a forward slash instead of File.separator. I'll file an issue, because this seems to completely break the ceylon.locale module in Windows. I'll also see if I can figure out a quick fix, since I'm currently on a Windows machine.

[Colin Bartolome]

I couldn't make any headway on a quick fix. Filed here:

https://github.com/ceylon/ceylon/issues/7052