syntax highlighting fixed

apps/remix-ide/src/app/tabs/debugger/debuggerUI/VmDebugger.js

@@ -38,7 +38,7 @@ function VmDebugger (vmDebuggerLogic) {
 
   this.functionPanel = new FunctionPanel()
   this.vmDebuggerLogic.event.register('functionsStackUpdate', (stack) => {
-    if (stack === null) return
+    if (stack === null || stack.length === 0) return
     let functions = []
     for (let func of stack) {
       functions.push(func.functionDefinition.name + '(' + func.inputs.join(', ') + ')')

apps/remix-ide/src/lib/offsetToLineColumnConverter.js

@@ -20,8 +20,8 @@ export class OffsetToLineColumnConverter extends Plugin {
   offsetToLineColumn (rawLocation, file, sources, asts) {
     if (!this.lineBreakPositionsByContent[file]) {
       const sourcesArray = Object.keys(sources)
-      if (!asts && file === 0 && sourcesArray.length === 1) {
-        // if we don't have ast, we process the only one available content
+      if (!asts || (file === 0 && sourcesArray.length === 1)) {
+        // if we don't have ast, we process the only one available content (applicable also for compiler older than 0.4.12)
         this.lineBreakPositionsByContent[file] = this.sourceMappingDecoder.getLinebreakPositions(sources[sourcesArray[0]].content)
       } else {
         for (var filename in asts) {