Here’s an example of a substitute server issue that leads to ugly client crashes:
--8<---------------cut here---------------start------------->8--- $ guix upgrade […] guix substitute: warning: while fetching https://bordeaux.guix.gnu.org/nar/lzip/fan4wanq1138ds9pj0s63f2iv4qygng0-dstat-0.7.4: server is somewhat slow guix substitute: warning: try `--no-substitutes' if the problem persists Backtrace: In ice-9/boot-9.scm: 1752:10 19 (with-exception-handler _ _ #:unwind? _ # _) In unknown file: 18 (apply-smob/0 #<thunk 7f0e562b2f60>) In ice-9/boot-9.scm: 724:2 17 (call-with-prompt _ _ #<procedure default-prompt-handleâ¦>) In ice-9/eval.scm: 619:8 16 (_ #(#(#<directory (guile-user) 7f0e562acc80>))) In guix/ui.scm: 2206:7 15 (run-guix . _) 2169:10 14 (run-guix-command _ . _) In ice-9/boot-9.scm: 1752:10 13 (with-exception-handler _ _ #:unwind? _ # _) 1752:10 12 (with-exception-handler _ _ #:unwind? _ # _) In guix/scripts/substitute.scm: 771:15 11 (_) In ice-9/exceptions.scm: 406:15 10 (process-substitution #<output: file 4> _ "/gnu/store/â¦" â¦) In ice-9/boot-9.scm: 1752:10 9 (with-exception-handler _ _ #:unwind? _ # _) In guix/scripts/substitute.scm: 479:9 8 (_) In ice-9/boot-9.scm: 1747:15 7 (with-exception-handler #<procedure 7f0e53925f00 at icâ¦> â¦) 1685:16 6 (raise-exception _ #:continuable? _) 1683:16 5 (raise-exception _ #:continuable? _) 1685:16 4 (raise-exception _ #:continuable? _) 1780:13 3 (_ #<&compound-exception components: (#<&error> #<&irriâ¦>) 1685:16 2 (raise-exception _ #:continuable? _) 1683:16 1 (raise-exception _ #:continuable? _) 1685:16 0 (raise-exception _ #:continuable? _) ice-9/boot-9.scm:1685:16: In procedure raise-exception: ERROR: 1. &http-get-error: uri: #<<uri> scheme: https userinfo: #f host: "bordeaux.guix.gnu.org" port: #f path: "/nar/lzip/fan4wanq1138ds9pj0s63f2iv4qygng0-dstat-0.7.4" query: #f fragment: #f> code: 502 reason: "Bad Gateway" 2. &message: "https://bordeaux.guix.gnu.org/nar/lzip/fan4wanq1138ds9pj0s63f2iv4qygng0-dstat-0.7.4: HTTP download failed: 502 (\"Bad Gateway\")" substitution of /gnu/store/fan4wanq1138ds9pj0s63f2iv4qygng0-dstat-0.7.4 failed guix upgrade: error: corrupt input while restoring archive from socket --8<---------------cut here---------------end--------------->8--- This should be handled gracefully. Also, in this case, ‘--fallback’ appears to have no effect. Ludo’.
