fix local (add async)

src/solidity/localDecoder.js

 'use strict'
 
-function solidityLocals (vmtraceIndex, internalTreeCall, stack, memory, storageResolver, currentSourceLocation) {
+async function solidityLocals (vmtraceIndex, internalTreeCall, stack, memory, storageResolver, currentSourceLocation) {
   var scope = internalTreeCall.findScope(vmtraceIndex)
   if (!scope) {
     var error = { 'message': 'Can\'t display locals. reason: compilation result might not have been provided' }
@@ -17,7 +17,7 @@ function solidityLocals (vmtraceIndex, internalTreeCall, stack, memory, storageR
         name = '<' + anonymousIncr + '>'
         anonymousIncr++
       }
-      locals[name] = variable.type.decodeFromStack(variable.stackDepth, stack, memory, storageResolver)
+      locals[name] = await variable.type.decodeFromStack(variable.stackDepth, stack, memory, storageResolver)
     }
   }
   return locals

src/solidity/types/StringType.js

@@ -12,8 +12,8 @@ class StringType extends DynamicBytes {
     return format(decoded)
   }
 
-  decodeFromStack (stackDepth, stack, memory) {
-    return super.decodeFromStack(stackDepth, stack, memory)
+  async decodeFromStack (stackDepth, stack, memory) {
+    return await super.decodeFromStack(stackDepth, stack, memory)
   }
 
   decodeFromMemoryInternal (offset, memory) {

src/solidity/types/ValueType.js

@@ -32,7 +32,7 @@ class ValueType {
     * @param {String} - memory
     * @return {Object} - decoded value
     */
-  decodeFromStack (stackDepth, stack, memory) {
+  async decodeFromStack (stackDepth, stack, memory) {
     var value
     if (stackDepth >= stack.length) {
       value = this.decodeValue('')

src/ui/SolidityLocals.js

@@ -41,8 +41,11 @@ class SolidityLocals {
             var stack = result[0].value
             var memory = result[1].value
             try {
-              var locals = localDecoder.solidityLocals(this.parent.currentStepIndex, this.internalTreeCall, stack, memory, this.storageResolver, sourceLocation)
-              this.basicPanel.update(locals)
+              localDecoder.solidityLocals(this.parent.currentStepIndex, this.internalTreeCall, stack, memory, this.storageResolver, sourceLocation).then((locals) => {
+                if (!result.error) {
+                  this.basicPanel.update(locals)
+                }
+              })
             } catch (e) {
               warningDiv.innerHTML = e.message
             }

test/solidity/localsTests/helper.js

@@ -12,8 +12,9 @@ function decodeLocal (st, index, traceManager, callTree, verifier) {
       index,
       function (error, result) {
         if (!error) {
-          var locals = localDecoder.solidityLocals(index, callTree, result[0].value, result[1].value, {}, {start: 5000})
-          verifier(locals)
+          localDecoder.solidityLocals(index, callTree, result[0].value, result[1].value, {}, {start: 5000}).then((locals) => {
+            verifier(locals)
+          })
         } else {
           st.fail(error)
         }