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Groups > linux.debian.bugs.dist > #1114028

Bug#1017739: emacs-lucid cannot start after upgrade

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Russ Allbery [2022-08-19 11:42:30] wrote:
> The 28.1 version of emacs-lucid fails on startup with a cryptic error
> message:
>
> % emacs
> Cannot find suitable directory for output in ‘comp-native-load-path’.
>
> Running emacs -q allows it to start, but it still reports the same error
> immediately during startup, and attempting to do someting as basic as
> M-x set-variable (to try to enable debug-on-error) fails with a similar
> error message:
>
> defalias: Cannot find suitable directory for output in ‘comp-native-load-path’.
>
> emacs -q --no-site-file avoids the error on startup, but M-x set-variable
> still immediately fails with the same error.

This error is signaled by `comp-el-to-eln-filename` and it usually
indicates that that function was unable to find a writable directory in
which to put the auto-generated `.eln` native-compiled files.

I don't know why it fails to find a writable directory.  Maybe

    emacs --debug-init` would help
or
    emacs -e '(message "%S" comp-native-load-path)'

might help track down the origin of the problem.

This said, Emacs shouldn't become unusable in such a circumstance, so we
should maybe use a patch along the lines of the one below (not sure if
it wraps the relevant invocation of `comp-el-to-eln-filename`, tho).


        Stefan


diff --git a/lisp/emacs-lisp/comp.el b/lisp/emacs-lisp/comp.el
index 304ea8cc6c1..5a599f8a0e8 100644
--- a/lisp/emacs-lisp/comp.el
+++ b/lisp/emacs-lisp/comp.el
@@ -3923,10 +3926,13 @@ comp-run-async-workers
                        "`comp-files-queue' should be \".el\" files: %s"
                        source-file)
          when (or native-comp-always-compile
-                  load ; Always compile when the compilation is
-                       ; commanded for late load.
-                  (file-newer-than-file-p
-                   source-file (comp-el-to-eln-filename source-file)))
+                  load        ; Always compile when the compilation is
+                              ; commanded for late load.
+                  ;; Skip compilation if `comp-el-to-eln-filename' fails
+                  ;; to find a writable directory.
+                  (with-demoted-errors "Async compilation :%S"
+                    (file-newer-than-file-p
+                     source-file (comp-el-to-eln-filename source-file))))
          do (let* ((expr `((require 'comp)
                            (setq comp-async-compilation t)
                            (setq warning-fill-column most-positive-fixnum)

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Bug#1017739: emacs-lucid cannot start after upgrade Russ Allbery <rra@debian.org> - 2022-08-19 20:50 +0200
  Bug#1017739: emacs-lucid cannot start after upgrade Stefan Monnier <monnier@iro.umontreal.ca> - 2022-08-22 01:40 +0200
    Bug#1017739: emacs-lucid cannot start after upgrade Andrea Corallo <akrl@sdf.org> - 2022-08-22 11:30 +0200
  Bug#1017739: emacs-lucid cannot start after upgrade Adam Lackorzynski <adam@os.inf.tu-dresden.de> - 2022-08-22 21:30 +0200
  Bug#1017739: emacs-lucid cannot start after upgrade Rob Browning <rlb@defaultvalue.org> - 2022-08-23 06:30 +0200
    Bug#1017739: emacs-lucid cannot start after upgrade Russ Allbery <rra@debian.org> - 2022-08-23 06:50 +0200
      Bug#1017739: emacs-lucid cannot start after upgrade Rob Browning <rlb@defaultvalue.org> - 2022-08-23 07:10 +0200
  Bug#1017739: emacs-lucid cannot start after upgrade Adam Lackorzynski <adam@os.inf.tu-dresden.de> - 2022-08-23 11:10 +0200
  Bug#1017739: emacs-lucid cannot start after upgrade Stefan Monnier <monnier@iro.umontreal.ca> - 2022-08-23 16:40 +0200
    Bug#1017739: emacs-lucid cannot start after upgrade Rob Browning <rlb@defaultvalue.org> - 2022-08-24 04:00 +0200
      Bug#1017739: emacs-lucid cannot start after upgrade Stefan Monnier <monnier@iro.umontreal.ca> - 2022-08-24 04:10 +0200
        Bug#1017739: emacs-lucid cannot start after upgrade Russ Allbery <rra@debian.org> - 2022-08-24 05:10 +0200
          Bug#1017739: emacs-lucid cannot start after upgrade Stefan Monnier <monnier@iro.umontreal.ca> - 2022-08-24 14:00 +0200
          Bug#1017739: emacs-lucid cannot start after upgrade David Bremner <bremner@debian.org> - 2022-09-12 00:20 +0200
            Bug#1017739: emacs-lucid cannot start after upgrade Stefan Monnier <monnier@iro.umontreal.ca> - 2022-09-12 03:40 +0200
              Bug#1017739: emacs-lucid cannot start after upgrade David Bremner <bremner@debian.org> - 2022-09-13 02:10 +0200

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