Ceylon version 1.2 Format Command

Question

How can I fix that:

Command:

$ ceylon format source/com/example/helloworld/*

Exception:

Exception in thread "main" java.lang.NoSuchMethodError: ceylon.language.runtime_.getMaxArraySize()Lceylon/language/Integer;
        at ceylon.collection.Hashtable.<init>(Hashtable.ceylon:35)
        at ceylon.collection.Hashtable.<init>(Hashtable.ceylon)
        at ceylon.collection.HashMap.$default$hashtable(HashMap.ceylon:31)
        at ceylon.formatter.options.Spaces$cache_.<init>(IndentMode.ceylon:62)
        at ceylon.formatter.options.Spaces$cache_.<init>(IndentMode.ceylon)
        at ceylon.formatter.options.Spaces.<init>(IndentMode.ceylon:59)
        at ceylon.formatter.options.FormattingOptions.$default$indentMode(FormattingOptions_generated.ceylon:355)
        at ceylon.formatter.options.FormattingOptions.<init>(FormattingOptions_generated.ceylon)
        at ceylon.formatter.options.loadProfile_.loadProfile(profiles.ceylon:79)
        at ceylon.formatter.options.loadProfile_.loadProfile(profiles.ceylon)
        at ceylon.formatter.options.commandLineOptions_.commandLineOptions(formattingOptions.ceylon:125)
        at ceylon.formatter.options.commandLineOptions_.commandLineOptions(formattingOptions.ceylon)
            at ceylon.formatter.run_.run(run.ceylon:285)
   ...

I think I have to re-install the formatter. But which version?

For no reason the following command works:

ceylon run ceylon.formatter source/com/example/helloworld/*.ceylon

Where is the difference and how can I fix it.

score 3 · Accepted Answer · answered Oct 29 '15 at 19:38

ceylon.language.runtime used to be implemented in hand-written Java code. In this code, getMaxArraySize() accidentally returned ceylon.language.Integer when it should have returned long. This worked, but wasn’t quite correct.

Then, with native support in Ceylon 1.2, runtime (along with some other objects) were rewritten as native Ceylon code. Since this is converted to Java by the Ceylon compiler, the method now gets the correct return type, long. Newly compiled modules will now call this method, but code that was compiled against an old ceylon.language will still try to call a method returning ceylon.language.Integer, which leads to your NoSuchMethodError.

What’s happening here, it seems, is that ceylon format runs ceylon.formatter/1.1.0, which was compiled against ceylon.language/1.1.0, and now can’t run with ceylon.language/1.2.0. ceylon run ceylon.formatter probably runs ceylon.formatter/1.2.0 for some reason, which works.

I’m not sure what you need to do to fix this. I changed the way the ceylon format plugin works recently, so you probably need to delete the old ceylon format script (a ceylon-format or ceylon-format.bat file somewhere in .ceylon/bin, I believe). Hopefully the new one is already there, ready to take over.

score 3 · Answer 2 · edited Oct 31 '15 at 00:01

Try ceylon plugin uninstall format and see if that fixes things.

A second option would be to say ceylon plugin install ceylon.formatter/1.2.0

The reason why ceylon format doesn't work but ceylon run does is because your installed ceylon format will look for the hard-coded version 1.1 which isn't compatible anymore while ceylon run will look for any version that's compatible with the current Ceylon version you're using. (So it will find both 1.1.0 and 1.2.0 but it will discard 1.1.0 because it isn't compatible and therefore choose 1.2.0 automatically)

Ceylon version 1.2 Format Command

2 Answers2