java.util.NoSuchElementException: no such attribute: exceptions in template context [lexerRule]
org.antlr.stringtemplate.StringTemplate.rawSetAttribute(StringTemplate.java:647)
org.antlr.stringtemplate.StringTemplate.setAttribute(StringTemplate.java:508)
org.antlr.stringtemplate.StringTemplate.setAttribute(StringTemplate.java:590)
org.antlr.stringtemplate.StringTemplate.setAttribute(StringTemplate.java:551)
org.antlr.grammar.v2.CodeGenTreeWalker.exceptionHandler(CodeGenTreeWalker.java:1479)
org.antlr.grammar.v2.CodeGenTreeWalker.exceptionGroup(CodeGenTreeWalker.java:1150)
org.antlr.grammar.v2.CodeGenTreeWalker.rule(CodeGenTreeWalker.java:849)
org.antlr.grammar.v2.CodeGenTreeWalker.rules(CodeGenTreeWalker.java:588)
org.antlr.grammar.v2.CodeGenTreeWalker.grammarSpec(CodeGenTreeWalker.java:530)
org.antlr.grammar.v2.CodeGenTreeWalker.grammar(CodeGenTreeWalker.java:312)
org.antlr.codegen.CodeGenerator.genRecognizer(CodeGenerator.java:429)
org.antlr.Tool.generateRecognizer(Tool.java:607)
org.antlr.Tool.process(Tool.java:484)
org.antlr.Tool.main(Tool.java:91)