avoiding null pointer exception

Author: rbonifacio

build.sbt

@@ -3,7 +3,7 @@ scalaVersion := "2.12.8"
 name := "svfa-scala"
 organization := "br.unb.cic"
 
-version := "0.2.2"
+version := "0.2.3"
 
 githubOwner := "rbonifacio"
 githubRepository := "svfa-scala"

src/main/scala/br/unb/cic/soot/svfa/jimple/JSVFA.scala

@@ -46,18 +46,17 @@ abstract class JSVFA extends SVFA with Analysis with FieldSensitiveness with Obj
   trait CopyFromMethodArgumentToBaseObject extends RuleAction {
     def from: Int
 
-    def apply(sootMethod: SootMethod, invokeStmt: jimple.Stmt, localDefs: SimpleLocalDefs) = {
+    def apply(sootMethod: SootMethod, invokeStmt: jimple.Stmt, localDefs: SimpleLocalDefs): Unit = {
       var srcArg: Value = null
       var expr: InvokeExpr = null
 
       try{
         srcArg = invokeStmt.getInvokeExpr.getArg(from)
         expr = invokeStmt.getInvokeExpr
       }catch {
-        case e: Exception=>
-          srcArg = invokeStmt.getInvokeExpr.getArg(from)
-          expr = invokeStmt.getInvokeExpr
-          println("Entrou com errro!")
+        case e: Throwable =>
+          println(e.printStackTrace())
+          return
       }
       if(hasBaseObject(expr) && srcArg.isInstanceOf[Local]) {
         val local = srcArg.asInstanceOf[Local]