ConstantExpressionEvaluation don't handle div by zero

[HaraldGustafsson]

When evaluating constant expressions when instantiating if the divider becomes 0 the compilation crashes, even when protected by an if-statement.

Compilation failed, no output written.
/ by zero :: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
at org.caltoopia.ast2ir.ConstantExpressionEvaluator.caseBinaryExpression(ConstantExpressionEvaluator.java:358)
at org.caltoopia.ir.util.IrReplaceSwitch.caseBinaryExpression(IrReplaceSwitch.java:1)
at org.caltoopia.ir.util.IrSwitch.doSwitch(IrSwitch.java:274)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
at org.caltoopia.ir.util.IrReplaceSwitch.caseProcCall(IrReplaceSwitch.java:572)
at org.caltoopia.ir.util.IrReplaceSwitch.caseProcCall(IrReplaceSwitch.java:1)
at org.caltoopia.ir.util.IrSwitch.doSwitch(IrSwitch.java:377)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
at org.caltoopia.ast2ir.ConstantExpressionEvaluator.caseBlock(ConstantExpressionEvaluator.java:222)
at org.caltoopia.ast2ir.ConstantExpressionEvaluator.caseBlock(ConstantExpressionEvaluator.java:1)
at org.caltoopia.ir.util.IrReplaceSwitch.caseBlock(IrReplaceSwitch.java:1)
at org.caltoopia.ir.util.IrSwitch.doSwitch(IrSwitch.java:409)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
at org.caltoopia.ir.util.IrReplaceSwitch.caseIfStatement(IrReplaceSwitch.java:623)
at org.caltoopia.ir.util.IrReplaceSwitch.caseIfStatement(IrReplaceSwitch.java:1)
at org.caltoopia.ir.util.IrSwitch.doSwitch(IrSwitch.java:401)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
at org.caltoopia.ir.util.IrReplaceSwitch.caseAction(IrReplaceSwitch.java:241)
at org.caltoopia.ast2ir.ConstantExpressionEvaluator.caseAction(ConstantExpressionEvaluator.java:209)
at org.caltoopia.ir.util.IrReplaceSwitch.caseActor(IrReplaceSwitch.java:195)
at org.caltoopia.ir.util.IrReplaceSwitch.caseActor(IrReplaceSwitch.java:1)
at org.caltoopia.ir.util.IrSwitch.doSwitch(IrSwitch.java:137)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
at org.caltoopia.ast2ir.ConstantExpressionEvaluator.evaluate(ConstantExpressionEvaluator.java:180)
at org.caltoopia.ast2ir.Instantiator.instantiate(Instantiator.java:88)
at org.caltoopia.cli.Cal2C.generate(Cal2C.java:352)
at org.caltoopia.frontend.ui.launch.CaltoopiaLaunchConfigurationDelegate.launch(CaltoopiaLaunchConfigurationDelegate.java:158)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:855)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:704)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1047)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1251)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)