Attempt to 'get-bytevector-n!' from directory in union.scm?

Attempt to 'get-bytevector-n!' from directory in union.scm?

[Mark H Weaver]

Any idea what happened here?

      Mark

--8<---------------cut here---------------start------------->8---
mhw:~/guix$ guix package -u readline
The following package will be installed:
   readline-6.2	out	/nix/store/xgi8n7x2m1ngg0d9p9ig6gscvzpdzkwh-readline-6.2

The following derivation will be built:
   /nix/store/2pkmji49pv87rk04zzv3nxjl3d57rph0-profile.drv

[... lots of other collision warnings ...]

Backtrace:
In unknown file:
   ?: 19 [apply-smob/1 #<catch-closure 101d1db0>]
In ice-9/boot-9.scm:
  63: 18 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 17 [eval # #]
In ice-9/boot-9.scm:
2320: 16 [save-module-excursion #<procedure 1018bd40 at ice-9/boot-9.scm:3961:3 ()>]
3966: 15 [#<procedure 1018bd40 at ice-9/boot-9.scm:3961:3 ()>]
1645: 14 [%start-stack load-stack ...]
1650: 13 [#<procedure 101dd2b8 ()>]
In unknown file:
   ?: 12 [primitive-load "/nix/store/y8v59kg2jdnbalxi1djz9bsdhk88l3r6-profile-guile-builder"]
In ice-9/eval.scm:
 387: 11 [eval # ()]
 432: 10 [eval # #]
In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
 202: 9 [union-build "/nix/store/dn29z8fpkh33sxgwwbxg0cn7ih523v65-profile" # # ...]
 102: 8 [loop #]
In srfi/srfi-1.scm:
 578: 7 [map #<procedure loop (tree)> (# # # # ...)]
In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
 101: 6 [loop #]
In srfi/srfi-1.scm:
 578: 5 [map #<procedure resolve-collision (leaves)> (# # # # ...)]
In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
 187: 4 [resolve-collision #]
In ice-9/boot-9.scm:
 793: 3 [call-with-input-file "/nix/store/25mp69n6i16b308sbyh42ic3qzld46li-ncurses-5.9/lib/terminfo" ...]
 793: 2 [call-with-input-file "/nix/store/y9q8dwgs8lxww2khkk1hfji1jihkfcz3-ncurses-5.9/lib/terminfo" ...]
In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
 116: 1 [#<procedure 10469fb0 at /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:111:13 (port2)> #<input: /nix/store/y9q8dwgs8lxww2khkk1hfji1jihkfcz3-ncurses-5.9/lib/terminfo 7>]
In unknown file:
   ?: 0 [get-bytevector-n! #<input: /nix/store/25mp69n6i16b308sbyh42ic3qzld46li-ncurses-5.9/lib/terminfo 6> ...]

ERROR: In procedure get-bytevector-n!:
ERROR: In procedure fport_fill_input: Is a directory
builder for `/nix/store/2pkmji49pv87rk04zzv3nxjl3d57rph0-profile.drv' failed with exit code 1
killing process 18700
guix package: error: build failed: build of `/nix/store/2pkmji49pv87rk04zzv3nxjl3d57rph0-profile.drv' failed
--8<---------------cut here---------------end--------------->8---

Re: Attempt to 'get-bytevector-n!' from directory in union.scm?

[Ludovic Courtès]

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Mark H Weaver <mhw@netris.org> skribis:

> In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
>  202: 9 [union-build "/nix/store/dn29z8fpkh33sxgwwbxg0cn7ih523v65-profile" # # ...]
>  102: 8 [loop #]
> In srfi/srfi-1.scm:
>  578: 7 [map #<procedure loop (tree)> (# # # # ...)]
> In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
>  101: 6 [loop #]
> In srfi/srfi-1.scm:
>  578: 5 [map #<procedure resolve-collision (leaves)> (# # # # ...)]
> In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
>  187: 4 [resolve-collision #]
> In ice-9/boot-9.scm:
>  793: 3 [call-with-input-file "/nix/store/25mp69n6i16b308sbyh42ic3qzld46li-ncurses-5.9/lib/terminfo" ...]
>  793: 2 [call-with-input-file "/nix/store/y9q8dwgs8lxww2khkk1hfji1jihkfcz3-ncurses-5.9/lib/terminfo" ...]
> In /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:
>  116: 1 [#<procedure 10469fb0 at /nix/store/n670kdk9ysi9jlq3f6ki4glc34p35dc1-module-import/guix/build/union.scm:111:13 (port2)> #<input: /nix/store/y9q8dwgs8lxww2khkk1hfji1jihkfcz3-ncurses-5.9/lib/terminfo 7>]
> In unknown file:
>    ?: 0 [get-bytevector-n! #<input: /nix/store/25mp69n6i16b308sbyh42ic3qzld46li-ncurses-5.9/lib/terminfo 6> ...]
>
> ERROR: In procedure get-bytevector-n!:
> ERROR: In procedure fport_fill_input: Is a directory

The ‘lib/terminfo’ directory is apparently provided by two or more
packages, so there’s a collision, leading to a ‘resolve-collision’ call,
which in turns call ‘file=?’, which is not prepared to deal with
directories.

This patch should fix it:


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diff --git a/guix/build/union.scm b/guix/build/union.scm
index 1b09da4..6e2b296 100644
--- a/guix/build/union.scm
+++ b/guix/build/union.scm
@@ -103,8 +103,13 @@ single leaf."
       (leaf leaf))))
 
 (define (file=? file1 file2)
-  "Return #t if the contents of FILE1 and FILE2 are identical, #f otherwise."
-  (and (= (stat:size (stat file1)) (stat:size (stat file2)))
+  "Return #t if FILE1 and FILE2 are regular files and their contents are
+identical, #f otherwise."
+  (let ((st1 (stat file1))
+        (st2 (stat file2)))
+    (and (eq? (stat:type st1) 'regular)
+         (eq? (stat:type st2) 'regular)
+         (= (stat:size st1) (stat:size st2))
          (call-with-input-file file1
            (lambda (port1)
              (call-with-input-file file2
@@ -117,7 +122,7 @@ single leaf."
                          (n2 (get-bytevector-n! port2 buf2 0 len)))
                      (and (equal? n1 n2)
                           (or (eof-object? n1)
-                            (loop)))))))))))
+                              (loop))))))))))))
 
 (define* (union-build output directories
                       #:key (log-port (current-error-port)))

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However, could you check which are the colliding packages?  Readline
doesn’t have lib/terminfo here.  Or perhaps ‘guix package’ is wrongfully
trying to keep two copies of ncurses in the profile?

Thanks,
Ludo’.