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bug#63103: 30.0.50; nconc compiler optimization breaks user packages


From: Philip Kaludercic
Subject: bug#63103: 30.0.50; nconc compiler optimization breaks user packages
Date: Thu, 27 Apr 2023 05:44:24 +0000

Daniel Mendler <mail@daniel-mendler.de> writes:

> The problem is that `(nconc list nil)` is optimized to `list`. However
> improper lists like `(a b c . 0)` should be turned into `(a b c)`.

Where is this behaviour documented?

> Daniel





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