diff --git a/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/ShowIntentionsPass.java b/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/ShowIntentionsPass.java
index 5d7b615376dd..1b2f6847c9f5 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/ShowIntentionsPass.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/ShowIntentionsPass.java
@@ -329,7 +329,7 @@ public class ShowIntentionsPass extends TextEditorHighlightingPass {
         }
       }
 
-      ~ if (indicator != null) {
+      if (indicator != null) {
         indicator.setText("Searching for additional intention actions & quick fixes");
       }
       for (IntentionMenuContributor extension : IntentionMenuContributor.EP_NAME.getExtensionList()) {
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/IntentionListStep.java b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/IntentionListStep.java
index 78bf6aa4b686..a9e9c73ee783 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/IntentionListStep.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/IntentionListStep.java
@@ -76,7 +76,6 @@ public class IntentionListStep implements ListPopupStep<IntentionActionWithTextC
     }
 
     if (hasSubstep(action)) {
-      //close intention preview popup if any
       closeIntentionPreviewPopup();
 
       return getSubStep(action, action.getToolName());
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewComputable.kt b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewComputable.kt
index 349b54d85811..e6ce9196b787 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewComputable.kt
+++ b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewComputable.kt
@@ -19,7 +19,6 @@ import com.intellij.psi.PsiFile
 import com.intellij.psi.PsiFileFactory
 import java.util.concurrent.Callable
 
-
 internal class IntentionPreviewComputable(private val project: Project,
                                           private val action: IntentionAction,
                                           private val originalFile: PsiFile,
@@ -52,11 +51,14 @@ internal class IntentionPreviewComputable(private val project: Project,
       )
     }
     catch (e: IntentionPreviewUnsupportedOperationException) {
-      throw ProcessCanceledException()
+      return null
+    }
+    catch (e: ProcessCanceledException) {
+      throw e
     }
     catch (e: Exception) {
       LOG.debug("There are exceptions on invocation the intention: '${action.text}' on a copy of the file.", e)
-      throw ProcessCanceledException(e)
+      return null
     }
   }
 
@@ -89,4 +91,4 @@ internal class IntentionPreviewComputable(private val project: Project,
   }
 }
 
-data class IntentionPreviewResult(val psiFile: PsiFile?, val lineFragments: List<LineFragment>)
\ No newline at end of file
+internal data class IntentionPreviewResult(val psiFile: PsiFile?, val lineFragments: List<LineFragment>)
\ No newline at end of file
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewEditorsPanel.kt b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewEditorsPanel.kt
index 0411f318e3a3..f45a8534dc64 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewEditorsPanel.kt
+++ b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewEditorsPanel.kt
@@ -22,7 +22,7 @@ internal class IntentionPreviewEditorsPanel(val editors: List<EditorEx>) : JPane
 
   private fun createSeparatorLine(colorsScheme: EditorColorsScheme): JPanel {
     var color = colorsScheme.getColor(CodeInsightColors.METHOD_SEPARATORS_COLOR)
-    color = color?.let { JBColor.namedColor("Group.separatorColor", JBColor(Gray.xCD, Gray.x51)) }
+    color = color ?: JBColor.namedColor("Group.separatorColor", JBColor(Gray.xCD, Gray.x51))
 
     return JBUI.Panels.simplePanel().withBorder(JBUI.Borders.customLine(color, 1, 0, 0, 0))
   }
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewPopupUpdateProcessor.kt b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewPopupUpdateProcessor.kt
index 902bcc65725a..312b8cb09a23 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewPopupUpdateProcessor.kt
+++ b/platform/lang-impl/src/com/intellij/codeInsight/intention/impl/preview/IntentionPreviewPopupUpdateProcessor.kt
@@ -72,19 +72,14 @@ internal class IntentionPreviewPopupUpdateProcessor(private val project: Project
   }
 
   private fun renderPreview(result: IntentionPreviewResult?) {
-    try {
-      val editors = IntentionPreviewModel.createEditors(project, originalFile, result)
-      if (editors.isEmpty()) {
-        select(NO_PREVIEW)
-        return
-      }
-
-      editorsToRelease.addAll(editors)
-      select(index, editors)
-    }
-    catch (e: Exception) {
+    val editors = IntentionPreviewModel.createEditors(project, originalFile, result)
+    if (editors.isEmpty()) {
       select(NO_PREVIEW)
+      return
     }
+
+    editorsToRelease.addAll(editors)
+    select(index, editors)
   }
 
   fun setup(updateAdvertiser: (String) -> Unit, parentIndex: Int) {
@@ -118,5 +113,5 @@ internal class IntentionPreviewPopupUpdateProcessor(private val project: Project
     private val ESCAPE_SHORTCUT_TEXT = KeymapUtil.getPreferredShortcutText(ESCAPE.shortcuts)
   }
 
-  class IntentionPreviewPopupKey
+  internal class IntentionPreviewPopupKey
 }
\ No newline at end of file