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

[Peter Dyballa]

Hello!

I am getting the same error after restarting my Mac. Reason was a set of 
updates for macOS High Sierra, Version 10.13.4. Only the X variant is hit, the 
NS variant has no problems at all.

Another change that happened recently is an upgrade of fontconfig to version 
2.13.0.

The GNU Emacs 27.0.50 source is fetched with command "/usr/bin/git checkout -q 
0bddbbc5aae621d5875880ac3e63f68d481df7c3" (whatever this means, the MacPorts 
package manager associates it with 20170918). The error remains even when 
re-compiling under the recent situation.

The GNU Emacs 27.0.50 launched weeks before the two updates worked OK with 
LANG=de_DE.UTF-8 LC_CTYPE=de_DE.UTF-8.


Configured using:
'configure --prefix=/opt/local --without-ns --without-dbus
--without-gconf --without-libotf --without-m17n-flt --without-gpm
--without-gnutls --with-xml2 --with-modules
'--enable-locallisppath=/Library/Application
Support/Emacs/calendar27:/Library/Application Support/Emacs' --infodir
/opt/local/share/info/emacs --with-ns CC=/usr/bin/clang 'CFLAGS=-pipe
-Os -arch x86_64' 'LDFLAGS=-L/opt/local/lib
-Wl,-headerpad_max_install_names -Wl,-no_pie -arch x86_64'
CPPFLAGS=-I/opt/local/include OBJC=/usr/bin/clang 'OBJCFLAGS=-pipe -Os
-arch x86_64''

Configured features:
JPEG RSVG IMAGEMAGICK NOTIFY ACL LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS
MODULES LCMS2

Important settings:
 value of $LANG: de_DE.UTF-8
 locale-coding-system: utf-8-unix


--
Greetings

 Pete

"If I can't dance to it, it's not my revolution.“
                                – A t-shirt designed by Jack Frager