From 14e47506ffabc43c25bf8da108abb6df78b803ad Mon Sep 17 00:00:00 2001
From: Hugo Herbelin
Date: Thu, 29 Sep 2016 17:33:47 +0200
Subject: Being more informative about the change of behavior of "subst".

---
 COMPATIBILITY | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'COMPATIBILITY')

diff --git a/COMPATIBILITY b/COMPATIBILITY
index 892eaa599e..d423e71df3 100644
--- a/COMPATIBILITY
+++ b/COMPATIBILITY
@@ -11,6 +11,12 @@ Remedy:
   instead (compatible with 8.4).
 - Unset the option for the program/proof the obligation/subproof originates
   from.
+
+Symptom: In a goal, order of hypotheses, or absence of an equality of
+the form "x = t" or "t = x", or no unfolding of a local definition.
+Cause: This might be connected to a number of fixes in the tactic
+"subst". The former behavior can be reactivated by issuing "Unset
+Regular Subst Tactic".
   
 Potential sources of incompatibilities between Coq V8.4 and V8.5
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