rejected initialization expression x+y

[Stephen Siegel]

This is rejected by front end:

void main() {
  int x = 2;
  int y = 3;
  int z = x+y;
}

java.lang.RuntimeException: 4: Unknown variable name: x
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processLhs(TreeParser.java:1439)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processPrimaryExpr(TreeParser.java:914)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processPostfixExpr(TreeParser.java:866)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processUnaryExpr(TreeParser.java:829)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processMultiplicativeExpr(TreeParser.java:793)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processAdditiveExpr(TreeParser.java:768)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processRelationalExpr(TreeParser.java:727)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processEqualityExpr(TreeParser.java:699)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processLogicalAndExpr(TreeParser.java:680)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processLogicalOrExpr(TreeParser.java:662)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processIfThenElseExpr(TreeParser.java:631)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processAssignExpr(TreeParser.java:625)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processExpr(TreeParser.java:570)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processVarDeclBody(TreeParser.java:326)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processVariableList(TreeParser.java:544)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processFunctionBody(TreeParser.java:515)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processFunction(TreeParser.java:421)
	at edu.udel.cis.vsl.minimp.front.minimp.parser.TreeParser.processAST(TreeParser.java:140)
	at edu.udel.cis.vsl.minimp.front.minimp.ModelExtractor.extract(ModelExtractor.java:29)
	at edu.udel.cis.vsl.minimp.front.minimp.ModelExtractor.extractModel(ModelExtractor.java:54)
	at arithmetic.ArithmeticTest.test(ArithmeticTest.java:29)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:73)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:46)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
	at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

[ywei]

Bug fixed.