put includion of variable declaration in a separate function

src/util/internalCallTree.js

@@ -109,6 +109,15 @@ async function buildTree (tree, step, scopeId) {
       return { outStep: step + 1 }
     } else {
       if (tree.includeLocalVariables) {
+        includeVariableDeclaration(tree, step, sourceLocation, scopeId)
+      }
+      step++
+    }
+  }
+  return { outStep: step }
+}
+
+function includeVariableDeclaration (tree, step, sourceLocation, scopeId) {
   var variableDeclaration = resolveVariableDeclaration(tree, step, sourceLocation)
   if (variableDeclaration && !tree.scopes[scopeId].locals[variableDeclaration.attributes.name]) {
     tree.traceManager.getStackAt(step, (error, stack) => {
@@ -126,11 +135,6 @@ async function buildTree (tree, step, scopeId) {
       }
     })
   }
-      }
-      step++
-    }
-  }
-  return { outStep: step }
 }
 
 function extractSourceLocation (tree, step) {