Do not throw exception analyzing imports in KtCodeFragments

compiler/frontend/src/org/jetbrains/kotlin/psi/KtCodeFragment.kt

@@ -107,7 +107,10 @@ public abstract class KtCodeFragment(
     }
 
     public fun importsAsImportList(): KtImportList? {
-        return KtPsiFactory(this).createFile(imports.joinToString("\n")).getImportList()
+        if (!imports.isEmpty() && context != null) {
+            return KtPsiFactory(this).createAnalyzableFile("imports_for_codeFragment.kt", imports.joinToString("\n"), context).importList
+        }
+        return null
     }
 
     override fun getImportDirectives(): List<KtImportDirective> {

idea/idea-core/src/org/jetbrains/kotlin/idea/core/Utils.kt

@@ -97,6 +97,8 @@ public fun ImplicitReceiver.asExpression(resolutionScope: LexicalScope, psiFacto
 }
 
 public fun KtImportDirective.targetDescriptors(resolutionFacade: ResolutionFacade = this.getResolutionFacade()): Collection<DeclarationDescriptor> {
+    // For codeFragments imports are created in dummy file
+    if (this.getContainingKtFile().doNotAnalyze != null) return emptyList()
     val nameExpression = importedReference?.getQualifiedElementSelector() as? KtSimpleNameExpression ?: return emptyList()
     return nameExpression.mainReference.resolveToDescriptors(resolutionFacade.analyze(nameExpression))
 }