Fixed problems with ModuleDescriptor mismatch after ProcessCanceledException

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionBindingContextProvider.kt

@@ -27,6 +27,7 @@ import com.intellij.psi.util.CachedValueProvider
 import com.intellij.psi.util.CachedValuesManager
 import com.intellij.psi.util.PsiModificationTracker
 import org.jetbrains.annotations.TestOnly
+import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.idea.analysis.analyzeInContext
 import org.jetbrains.kotlin.idea.project.KotlinCodeBlockModificationListener
 import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
@@ -59,7 +60,7 @@ class CompletionBindingContextProvider(project: Project) {
         fun getInstance(project: Project): CompletionBindingContextProvider
                 = project.getComponent(CompletionBindingContextProvider::class.java)
 
-        var ENABLED = false
+        var ENABLED = true
     }
 
     private class CompletionData(
@@ -67,6 +68,7 @@ class CompletionBindingContextProvider(project: Project) {
             val prevStatement: KtExpression?,
             val psiElementsBeforeAndAfter: List<PsiElementData>,
             val bindingContext: BindingContext,
+            val moduleDescriptor: ModuleDescriptor,
             val statementResolutionScope: LexicalScope,
             val statementDataFlowInfo: DataFlowInfo,
             val debugText: String
@@ -116,6 +118,8 @@ class CompletionBindingContextProvider(project: Project) {
                 log("Previous statement is not the same\n")
             psiElementsBeforeAndAfter != prevCompletionData.psiElementsBeforeAndAfter ->
                 log("PSI-tree has changed inside current scope\n")
+            prevCompletionData.moduleDescriptor != resolutionFacade.moduleDescriptor ->
+                log("ModuleDescriptor has been reset")
             inStatement.isTooComplex() ->
                 log("Current statement is too complex to use optimization\n")
             else -> {
@@ -136,7 +140,7 @@ class CompletionBindingContextProvider(project: Project) {
         prevCompletionDataCache.value.data = if (block != null && modificationScope != null) {
             val resolutionScope = inStatement.getResolutionScope(bindingContext, resolutionFacade)
             val dataFlowInfo = bindingContext.getDataFlowInfoBefore(inStatement)
-            CompletionData(block, prevStatement, psiElementsBeforeAndAfter!!, bindingContext, resolutionScope, dataFlowInfo,
+            CompletionData(block, prevStatement, psiElementsBeforeAndAfter!!, bindingContext, resolutionFacade.moduleDescriptor, resolutionScope, dataFlowInfo,
                            debugText = position.text)
         }
         else {