check is ast present

apps/remix-ide/src/app/compiler/compiler-abstract.js

@@ -32,6 +32,10 @@ module.exports = class CompilerAbstract {
   getSourceName (fileIndex) {
     if (this.data && this.data.sources) {
       return Object.keys(this.data.sources)[fileIndex]
+    } else if (Object.keys(this.source.sources).length === 1) {
+      // if we don't have ast, we return the only one filename present.
+      const sourcesArray = Object.keys(this.source.sources)
+      return sourcesArray[0]
     }
     return null
   }

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

@@ -19,11 +19,17 @@ export class OffsetToLineColumnConverter extends Plugin {
 
   offsetToLineColumn (rawLocation, file, sources, asts) {
     if (!this.lineBreakPositionsByContent[file]) {
-      for (var filename in asts) {
-        var source = asts[filename]
-        if (source.id === file) {
-          this.lineBreakPositionsByContent[file] = this.sourceMappingDecoder.getLinebreakPositions(sources[filename].content)
-          break
+      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
+        this.lineBreakPositionsByContent[file] = this.sourceMappingDecoder.getLinebreakPositions(sources[sourcesArray[0]].content)
+      } else {
+        for (var filename in asts) {
+          var source = asts[filename]
+          if (source.id === file) {
+            this.lineBreakPositionsByContent[file] = this.sourceMappingDecoder.getLinebreakPositions(sources[filename].content)
+            break
+          }
         }
       }
     }