IDEA-312152: Exceptions happening during scanning should not interrupt...

IDEA-312152: Exceptions happening during scanning should not interrupt scanning. They should be logged and ignored.

(cherry picked from commit a56956aae8e42a7c76cdf2297811608a8494a446)

IJ-CR-102308

GitOrigin-RevId: 9b8f21db50f1f90130110722499fbe622e60911b

platform/lang-impl/src/com/intellij/util/indexing/UnindexedFilesScanner.java

@@ -374,6 +374,15 @@ public class UnindexedFilesScanner implements MergeableQueueTask<UnindexedFilesS
           provider.iterateFiles(project, collectingIterator, thisProviderDeduplicateFilter);
           perProviderSink.commit();
         }
+        catch (ProcessCanceledException pce) {
+          throw pce;
+        }
+        catch (Exception e) {
+          // CollectingIterator should skip failing files by itself. But if provider.iterateFiles cannot iterate files and throws exception,
+          // we want to ignore whole origin and let other origins to complete normally.
+          LOG.error("Error while scanning files of " + provider.getDebugName() + "\n" +
+                    "To reindex files under this origin IDEA has to be restarted", e);
+        }
         finally {
           scanningStatistics.setNumberOfSkippedFiles(thisProviderDeduplicateFilter.getNumberOfSkippedFiles());
           synchronized (allTasksFinished) {