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authorLudovic Courtès <ludo@gnu.org>2019-02-11 22:48:24 +0100
committerLudovic Courtès <ludo@gnu.org>2019-02-11 23:23:28 +0100
commit70a50305c495ca96fdec3d31e7e7972cfc54f8ee (patch)
tree22338809cf111645a14b3ce0ff9b55469adc0ff0
parent5ea206a8a916ff055c1f3840e4a52ab2c123658f (diff)
downloadguix-70a50305c495ca96fdec3d31e7e7972cfc54f8ee.tar.gz
ui: Always print the exception upon load errors.
Fixes <https://bugs.gnu.org/34402>.
Reported by <pkill9@runbox.com>.

Previously 'display-error' could be called with the wrong number of
arguments (e.g., for 'git-error' exceptions), and thus nothing at all
was displayed.

* guix/ui.scm (report-load-error): Check whether ARGS matches the
parameters for 'display-error' and call 'print-exception' otherwise.
-rw-r--r--guix/ui.scm11
1 files changed, 9 insertions, 2 deletions
diff --git a/guix/ui.scm b/guix/ui.scm
index f0465519b6..2fc001d2eb 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -374,9 +374,16 @@ ARGS is the list of arguments received by the 'throw' handler."
          (report-error (G_ "exception thrown: ~s~%") obj))
      (when (fix-hint? obj)
        (display-hint (condition-fix-hint obj))))
-    ((error args ...)
+    ((key args ...)
      (report-error (G_ "failed to load '~a':~%") file)
-     (apply display-error frame (current-error-port) args))))
+     (match args
+       (((? symbol? proc) (? string? message) (args ...) . rest)
+        (display-error frame (current-error-port) proc message
+                       args rest))
+       (_
+        ;; Some exceptions like 'git-error' do not follow Guile's convention
+        ;; above and need to be printed with 'print-exception'.
+        (print-exception (current-error-port) frame key args))))))
 
 (define (warn-about-load-error file args)         ;FIXME: factorize with ↑
   "Report the failure to load FILE, a user-provided Scheme file, without