User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:63.0) Gecko/20100101
Firefox/63.0
Build Identifier: 

With locale set to en_US.UTF-8, xemacs (and xclock and xfd) all show the
warning:

Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset

Note that this issue did not exist in Leap 42.3.  It appeared in 15.0.


Reproducible: Always

Steps to Reproduce:
1. ensure locale is set to: en_US.UTF-8
2. run: xemacs
Actual Results:  
Console shows warning:
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset

And xemacs (vm mail module) will not be able to display mail. Error displayed
is: xintl/error Can't initialize XIM: Can't get fontset resource for Input
Method

Expected Results:  
xemacs should not display that warning, and vm module will be able to display
the mail without that error message.

As a workaround, you can run:

export LANG=en_US
xemacs

Which corrects the issue.