[rules-dev] Another MVEL hiccup

This is not correct: Foo( id == "\a" ) and it is rightly flagged as a syntax error, but the ensuing stack dump is uncalled for: Exception in thread "main" [Error: illegal escape sequence: a] [Near : {... "\a" ....}] ^ [Line: 1, Column: 3] at org.mvel2.util.ParseTools.handleEscapeSequence(ParseTools.java:889) at org.mvel2.util.ParseTools.handleStringEscapes(ParseTools.java:1533) at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:1105) at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:128) at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) at org.mvel2.MVEL.analysisCompile(MVEL.java:670) at org.mvel2.MVEL.analysisCompile(MVEL.java:674) at org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:942) at org.drools.rule.builder.PatternBuilder.buildRelationalExpression(PatternBuilder.java:638) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:588) at org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternBuilder.java:449) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:296) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:118) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:80) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2503) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:847) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:443) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:626) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:41) at foobar.Main.setup(Main.java:68) at foobar.Main.main(Main.java:124) -W