[commit: ghc] master: Note #11108 in the bugs section of users guide (d2a2d5e)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/d2a2d5ebb08caedcd2a2a7a9e06ed6f4cbba96e7/ghc

>---------------------------------------------------------------

commit d2a2d5ebb08caedcd2a2a7a9e06ed6f4cbba96e7
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Thu Nov 26 00:32:21 2015 +0100

    Note #11108 in the bugs section of users guide


>---------------------------------------------------------------

d2a2d5ebb08caedcd2a2a7a9e06ed6f4cbba96e7
 docs/users_guide/bugs.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/users_guide/bugs.rst b/docs/users_guide/bugs.rst
index 55551ea..b287378 100644
--- a/docs/users_guide/bugs.rst
+++ b/docs/users_guide/bugs.rst
@@ -463,6 +463,11 @@ Bugs in GHC
    libraries that come with GHC are probably built without this option,
    unless you built GHC yourself.
 
+-  There is known to be maleficent interactions between weak references and
+   laziness. Particularly, it has been observed that placing a thunk containing
+   a reference to a weak reference inside of another weak reference may cause
+   runtime crashes. See :ghc-ticket:`11108` for details.
+
 .. _bugs-ghci:
 
 Bugs in GHCi (the interactive GHC)