From c65aadffa54ebea6123466e3396c997582c708bc Mon Sep 17 00:00:00 2001
From: "simonpj@microsoft.com" <unknown>
Date: Wed, 10 Oct 2007 14:56:46 +0000
Subject: [PATCH] Comments only

---
 compiler/utils/IOEnv.hs |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/compiler/utils/IOEnv.hs b/compiler/utils/IOEnv.hs
index 728e55c..fc513a0 100644
--- a/compiler/utils/IOEnv.hs
+++ b/compiler/utils/IOEnv.hs
@@ -99,7 +99,9 @@ fixM f = IOEnv (\ env -> fixIO (\ r -> unIOEnv (f r) env))
 
 ---------------------------
 tryM :: IOEnv env r -> IOEnv env (Either Exception r)
--- Reflect UserError exceptions into IOEnv monad
+-- Reflect UserError exceptions (only) into IOEnv monad
+-- Other exceptions are not caught; they are simply propagated as exns
+--
 -- The idea is that errors in the program being compiled will give rise
 -- to UserErrors.  But, say, pattern-match failures in GHC itself should
 -- not be caught here, else they'll be reported as errors in the program 
-- 
1.7.10.4