I get a FilterException error for this grammar:

module Test

exports
context-free start-symbols
Start
context-free syntax
Exp     -> Start
Bool    -> Exp
Exp “=” Exp	-> Exp {right, cons(“Error”)}
VARID    -> Exp
VARID    -> Bool

lexical syntax
[A-Z]*  -> VARID
lexical restrictions
VARID -/- [A-B]

The problem appears only when I have ambiguities and right associativity.

Submitted by Radu Mereuta on 26 July 2011 at 14:32

Do you have a stack trace for this problem?

eclipse.buildId=M20110210-1200
java.version=1.6.0_24
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments:  -os win32 -ws win32 -arch x86_64


Error
Tue Jul 26 18:11:11 EEST 2011
Internal parsing error: Runtime exception when applying filters

org.spoofax.jsglr.client.FilterException: Runtime exception when applying filters
	at org.strategoxt.imp.runtime.parser.JSGLRI.doParse(JSGLRI.java:182)
	at org.strategoxt.imp.runtime.parser.AbstractSGLRI.parse(AbstractSGLRI.java:106)
	at org.strategoxt.imp.runtime.parser.SGLRParseController.doParse(SGLRParseController.java:352)
	at org.strategoxt.imp.runtime.parser.SGLRParseController.parse(SGLRParseController.java:287)
	at org.strategoxt.imp.runtime.parser.SGLRParseController.parse(SGLRParseController.java:1)
	at org.strategoxt.imp.runtime.dynamicloading.DynamicParseController.parse(DynamicParseController.java:168)
	at org.eclipse.imp.editor.ParserScheduler.run(ParserScheduler.java:86)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: org.spoofax.jsglr.client.FilterException: Runtime exception when applying filters
	at org.spoofax.jsglr.client.Disambiguator.applyFilters(Disambiguator.java:251)
	at org.spoofax.jsglr.client.SGLR.sglrParse(SGLR.java:318)
	at org.spoofax.jsglr.client.SGLR.parse(SGLR.java:265)
	at org.strategoxt.imp.runtime.parser.JSGLRI.doParse(JSGLRI.java:163)
	... 7 more
Caused by: java.lang.UnsupportedOperationException
	at org.spoofax.jsglr.client.ParseNode.getLabel(ParseNode.java:38)
	at org.spoofax.jsglr.client.Disambiguator.applyRightAssociativeFilter(Disambiguator.java:580)
	at org.spoofax.jsglr.client.Disambiguator.applyAssociativityPriorityFilter(Disambiguator.java:537)
	at org.spoofax.jsglr.client.Disambiguator.filterTree(Disambiguator.java:456)
	at org.spoofax.jsglr.client.Disambiguator.filterAmbiguities(Disambiguator.java:820)
	at org.spoofax.jsglr.client.Disambiguator.filterTree(Disambiguator.java:469)
	at org.spoofax.jsglr.client.Disambiguator.applyFilters(Disambiguator.java:245)
	... 10 more

Tried it with r23157

There seems to be a check for this case in the “left” associativity filter, I added one for the “right” one as well in r23162.

Sorry, but no change. The problem is still there.
Try and see the grammar in my first comment, it triggers the bug.

Do you get the same stack trace?

A bit different:

eclipse.buildId=M20110210-1200
java.version=1.6.0_24
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments:  -os win32 -ws win32 -arch x86_64


Error
Wed Jul 27 23:49:47 EEST 2011
Internal parsing error: Runtime exception when applying filters

org.spoofax.jsglr.client.FilterException: Runtime exception when applying filters
	at org.strategoxt.imp.runtime.parser.JSGLRI.doParse(JSGLRI.java:182)
	at org.strategoxt.imp.runtime.parser.AbstractSGLRI.parse(AbstractSGLRI.java:106)
	at org.strategoxt.imp.runtime.parser.SGLRParseController.doParse(SGLRParseController.java:352)
	at org.strategoxt.imp.runtime.parser.SGLRParseController.parse(SGLRParseController.java:287)
	at org.strategoxt.imp.runtime.parser.SGLRParseController.parse(SGLRParseController.java:1)
	at org.strategoxt.imp.runtime.dynamicloading.DynamicParseController.parse(DynamicParseController.java:169)
	at org.eclipse.imp.editor.ParserScheduler.run(ParserScheduler.java:86)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: org.spoofax.jsglr.client.FilterException: Runtime exception when applying filters
	at org.spoofax.jsglr.client.Disambiguator.applyFilters(Disambiguator.java:251)
	at org.spoofax.jsglr.client.SGLR.sglrParse(SGLR.java:318)
	at org.spoofax.jsglr.client.SGLR.parse(SGLR.java:265)
	at org.strategoxt.imp.runtime.parser.JSGLRI.doParse(JSGLRI.java:163)
	... 7 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: 5
	at org.spoofax.jsglr.client.Disambiguator.applyRightAssociativeFilter(Disambiguator.java:589)
	at org.spoofax.jsglr.client.Disambiguator.applyAssociativityPriorityFilter(Disambiguator.java:537)
	at org.spoofax.jsglr.client.Disambiguator.filterTree(Disambiguator.java:456)
	at org.spoofax.jsglr.client.Disambiguator.applyFilters(Disambiguator.java:245)
	... 10 more

An update to this issue, I found a way to break the left filter as well. This example: "A+0", breaks for this grammar:
context-free start-symbols
    Start

context-free syntax
    Exp         -> Start
    VARID       -> Exp
    NAT       -> Exp
    INT       -> Exp

    Exp "+" Exp -> Exp {left, cons("Add")}

lexical syntax
    [A-Z]+  -> VARID
    [0-9]+  -> NAT
    "-"?[0-9]+ -> INT

lexical restrictions
    VARID -/- [A-B]

Sometimes it hangs, sometimes it reports an error similar to the above, and sometimes I get this erroneous AST: amb(["A", amb(["", ""])]).
If I switch left with right and try to parse "0+A" I get the same behaviors.

I'm not sure what happens, but I hope that you can fix it.

I think with the latest fix in r24658 this should be resolved: it no longer throws a FilterException or ArrayIndexOutOfBoundsException for your grammar. The result it returns for the grammar above is now: Add("A",amb(["0","0"])). (There’s still an ambiguity since it can be a NAT or an INT.) Let me know if there’s still more trouble.

Thanks Lennart. I’ve updated eclipse and it works. I’m getting the expected result. I still have a request though. Could you update strategoxt.jar also?
This is the tool we’ll be using in our release. Right now the versions that I could find are based on r24429.

Alright, the buildfarm now provides a new version :)