Hi Wolfgang,<br><br>This is not a mvel issue, that in this is case is correctly reporting the syntax error, but only a small bug in drools failing to catch and correctly menage the excpetion thrown by mvel in that particular case. <br>
<br>I just pushed the fix, thank you for reporting this.<br><br>Mario<br><br><div class="gmail_quote">On Sun, Mar 11, 2012 at 7:26 PM, Wolfgang Laun <span dir="ltr"><<a href="mailto:wolfgang.laun@gmail.com">wolfgang.laun@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>This is not correct:</div> Foo( id == "\a" )<div>and it is rightly flagged as a syntax error, but the ensuing stack dump is uncalled for:</div>
<div><br></div><div><div>Exception in thread "main" [Error: illegal escape sequence: a]</div>
<div>[Near : {... "\a" ....}]</div><div> ^</div><div>[Line: 1, Column: 3]</div><div><span style="white-space:pre-wrap"> </span>at org.mvel2.util.ParseTools.handleEscapeSequence(ParseTools.java:889)</div>
<div><span style="white-space:pre-wrap"> </span>at org.mvel2.util.ParseTools.handleStringEscapes(ParseTools.java:1533)</div><div><span style="white-space:pre-wrap"> </span>at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:1105)</div>
<div><span style="white-space:pre-wrap"> </span>at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:128)</div><div><span style="white-space:pre-wrap"> </span>at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)</div>
<div><span style="white-space:pre-wrap"> </span>at org.mvel2.MVEL.analysisCompile(MVEL.java:670)</div><div><span style="white-space:pre-wrap"> </span>at org.mvel2.MVEL.analysisCompile(MVEL.java:674)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:942)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.PatternBuilder.buildRelationalExpression(PatternBuilder.java:638)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:588)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternBuilder.java:449)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:296)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:118)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:80)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2503)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:847)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:443)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:626)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:41)</div><div><span style="white-space:pre-wrap"> </span>at foobar.Main.setup(Main.java:68)</div>
<div><span style="white-space:pre-wrap"> </span>at foobar.Main.main(Main.java:124)</div></div><span class="HOEnZb"><font color="#888888"><div><br></div><div>-W</div><div><br></div>
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<br></blockquote></div><br>