I defer to SimonM but IIRC each stable name corresponds to an entry in the 
stable-name table; the index in the table is the “stable” thing in a stable 
name.  So I bet that comparison compares these indices.

If two stable names are pointer-equal, they presumably contain the same index 
into the table.

But is the reverse true?  That is, can we be sure that two pointer-distinct 
stable name objects contain different indices?

Simon

From: ghc-devs <[email protected]> On Behalf Of David Feuer
Sent: 19 August 2018 18:53
To: ghc-devs <[email protected]>
Subject: Stable name equality

eqStableName# is not currently defined as pointer equality. Is there some 
reason for this? My understanding is that there is a one-to-one correspondence 
between stable name objects and active stable name table entries, so pointer 
equality should be sufficient. Am I missing something?
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