GNU bug report logs - #30788
27.0.50; Getting 'char-displayable-p: Invalid hash table rehash size: 1.0' when starting emacs -Q

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From: Mats Lidell <mats.lidell <at> cag.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Ulrich Mueller <ulm <at> gentoo.org>, 30788 <at> debbugs.gnu.org
Subject: bug#30788: 27.0.50; Getting 'char-displayable-p: Invalid hash table rehash size: 1.0' when starting emacs -Q
Date: Tue, 13 Mar 2018 18:42:27 +0100

> Eli Zaretskii writes:
> > Date: Tue, 13 Mar 2018 11:14:18 +0100
> > From: Ulrich Mueller <ulm <at> gentoo.org>
> > 
> > Downstream bug: https://bugs.gentoo.org/650332
>
> Can someone who can reproduce this please post a backtrace?

I'm sorry Eli, I'm afraid I can't do that! (Or setting the pun aside lack the
skills or have a too broken emacs ...) Please advice what I should do.

What I have tried:

 - On starting emacs -Q I immediately get the message in the minibuffer.

 - If I then try M-x debug-on-entry RET I don't get the chance to enter what
   function to debug. In the message buffer I get: 'autoload-do-load: Invalid
   hash table rehash size: 1.0'

 - If I enter '(list-packages)' in *scratch* buffer and evaluate it I get:
   'debug: Invalid hash table rehash size: 1.0'

 - Starting with emacs --debug-init makes no difference. Same message. Nothing else.

The reason I try with list-packages above is that I first thought it could be
related to some bad package so I found that that command could trigger the
problem as well.

Good news though. Down grading to fontconfig version fontconfig-2.12.6 clears
the issue.

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