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([2601:184:4180:66e7:b13c:8fb4:6743:5078]) by smtp.gmail.com with ESMTPSA id i2-v6sm1654132ywa.20.2018.07.18.06.43.53 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 18 Jul 2018 06:43:53 -0700 (PDT) In-Reply-To: Content-Language: en-GB X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4002:c09::233 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:227544 Archived-At: On 2018-07-18 09:18, Stefan Monnier wrote: >>> For example, (eql 0.0e+NaN -0.0e+NaN) now returns t >>> because the two NaNs have different signs; formerly it returned nil. >> Should this be the other way around ? > You mean it's (eql -0.0e+NaN 0.0e+NaN) which should return t? > Shouldn't `eql` be commutative? No, I mean that Paul wrote 't' where he meant 'nil' and 'nil' where he meant 't'.