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Re: member inconsistency?

From: Philipp Stephani
Subject: Re: member inconsistency?
Date: Thu, 28 Jan 2016 09:41:22 +0000

Nicolas Goaziou <address@hidden> schrieb am Do., 28. Jan. 2016 um 09:41 Uhr:

The following behaviour is surprising

  (assq 'a 'b)   => #ERROR
  (memq 'a 'b)   => #ERROR
  (assoc 'a 'b)  => #ERROR

For completeness, memql and assq have the same behavior.

so far so good, but

  (member 'a 'b) => nil

I was caught by this when replacing (member SYMBOL ...) with (memq
SYMBOL ...). Is it intentional? Should I file a bug report instead?

Yes, I think this is a bug. There is no reason why `member' should be so inconsistent, especially given that is has (almost) the same docstring as memq and memql.

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