Wrong result when use regexp in "find in path" (IDEA-151495)

java/java-tests/testSrc/com/intellij/find/FindManagerTest.java

@@ -869,6 +869,7 @@ public class FindManagerTest extends DaemonAnalyzerTestCase {
     assertEquals("public static   MyType my   = 1;", buildStringToFindForIndicesFromRegExp("public static (@A)? MyType my\\w+?  = 1;", myProject));
     assertEquals(" Foo ", buildStringToFindForIndicesFromRegExp("\\bFoo\\b", myProject));
     assertEquals("", buildStringToFindForIndicesFromRegExp("foo|bar", myProject));
+    assertEquals(" Exit Foo Bar Baz", buildStringToFindForIndicesFromRegExp("\\nExit\\tFoo\\rBar\\fBaz", myProject));
   }
 
   public void testCreateFileMaskCondition() {

platform/lang-impl/src/com/intellij/find/impl/FindInProjectUtil.java

@@ -413,7 +413,11 @@ public class FindInProjectUtil {
 
         @Override
         public String fun(PsiElement element) {
-          return regExpCharPsiClass.isInstance(element) ? element.getText() : " ";
+          if(regExpCharPsiClass.isInstance(element)) {
+            String text = element.getText();
+            if (!"\\n".equals(text) && !"\\t".equals(text) && !"\\f".equals(text) && !"\\r".equals(text)) return text;
+          }
+          return " ";
         }
       }, "");
     } finally {