[antlr-interest] NPE parsing tree grammar

[David Wood]

I would submit a bug, but I can't find a JIRA admin on the site to create 
me an account.

Exception in thread "main" java.lang.NullPointerException
        at org.antlr.runtime.tree.BaseTreeAdaptor.becomeRoot(
BaseTreeAdaptor.java:145)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.relationalExpression(
DSMTreeGrammar.java:3058)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.equalityExpression(
DSMTreeGrammar.java:2920)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.andExpression(
DSMTreeGrammar.java:2819)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.exclusiveOrExpression(
DSMTreeGrammar.java:2718)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.inclusiveOrExpression(
DSMTreeGrammar.java:2617)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.conditionalAndExpression(
DSMTreeGrammar.java:2516)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.conditionalOrExpression(
DSMTreeGrammar.java:2415)
        at com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.expression(
DSMTreeGrammar.java:2355)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.conditionalExpression(
DSMTreeGrammar.java:2293)
        at com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.rule(
DSMTreeGrammar.java:1338)
        at 
com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.ruleStatement(
DSMTreeGrammar.java:1230)
        at com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.ruleSet(
DSMTreeGrammar.java:1155)
        at com.ibm.watson.dsm.parser.dsm.antlr.DSMTreeGrammar.root(
DSMTreeGrammar.java:170)
        at com.ibm.watson.dsm.parser.dsm.DSMParser.parse(DSMParser.java:63
)
        at com.ibm.watson.dsm.parser.dsm.DSMParser.main(DSMParser.java:79)



David Wood 
Computing Systems for Wireless Networks
IBM TJ Watson Research Center
dawood at us.ibm.com
914-784-5123 (office), 914-396-6515 (mobile)
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