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[85.127.52.93]) by smtp.gmail.com with ESMTPSA id uz4-20020a170907118400b006dab1ea6e3asm4358194ejb.51.2022.03.12.06.34.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Mar 2022 06:34:33 -0800 (PST) Message-ID: <80793191d3eea8c53cec9a61515905327844c73e.camel@gmail.com> Subject: Re: Profile collisions are ignored, installing multiple versions of the same package is silently broken From: Liliana Marie Prikler To: Maxime Devos , bug-guix@gnu.org Date: Sat, 12 Mar 2022 15:34:31 +0100 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.42.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::644 (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::644; envelope-from=liliana.prikler@gmail.com; helo=mail-ej1-x644.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.3 (-) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.3 (--) Am Samstag, dem 12.03.2022 um 10:45 +0100 schrieb Maxime Devos: > Hi guix, > > Try > > $ guix shell --pure bash pango@1.42 pango@1.48 > $ ~/.guix-profile/bin/ls -l $GUIX_ENVIRONMENT/lib/libpango*.so > > Result: > [...]/lib/libpango-1.0.so -> [...]-pango-1.42.4/lib/libpango-1.0.so > [...]/lib/libpangocairo-1.0.so -> [...]-pango- > 1.42.4/lib/libpangocairo-1.0.so > [...]/lib/libpangoft2-1.0.so -> [...]-1.42.4/lib/libpangoft2-1.0.so > [...]/lib/libpangoxft-1.0.so -> [...]-pango-1.42.4/lib/libpangoxft- > 1.0.so > > Question: how does this even work?  Aren't error messages about > profile collisions a thing?  They ought to be, but perhaps these are only checked for propagated packages, not for explicitly specified ones. Would still be weird, if you e.g. put pango@1.48 and something propagating pango@1.42 together, it ought to error. Perhaps an oversight? > Another question: if this use case was supported, shouldn't it point > to the newer pango instead of the older pango? union-build implicitly takes the first file it finds -- this is actually sane, but sadly undocumented behaviour. In other words, if you specify pango@1.48 first, it should be the one being picked. Cheers