From ddacc72c2d98f56332a5b7fa87577c33ba0d5e6b Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Thu, 25 Aug 2016 18:27:09 +0200
Subject: [PATCH] don't let recursive PIEAE spoil the diagnostics (PY-20537)

---
 .../com/intellij/psi/PsiInvalidElementAccessException.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/platform/core-api/src/com/intellij/psi/PsiInvalidElementAccessException.java b/platform/core-api/src/com/intellij/psi/PsiInvalidElementAccessException.java
index 4141801360d6..a4d86d324979 100644
--- a/platform/core-api/src/com/intellij/psi/PsiInvalidElementAccessException.java
+++ b/platform/core-api/src/com/intellij/psi/PsiInvalidElementAccessException.java
@@ -116,7 +116,12 @@ public class PsiInvalidElementAccessException extends RuntimeException implement
       String traceText = !isTrackingInvalidation() ? "disabled" :
                          trace != null ? "see attachment" :
                          "no info";
-      reason += " because: " + reason(element) + "\ninvalidated at: " + traceText;
+      try {
+        reason += " because: " + reason(element);
+      }
+      catch (PsiInvalidElementAccessException ignore) {
+      }
+      reason += "\ninvalidated at: " + traceText;
     }
     return reason + (message == null ? "" : "; " + message);
   }