bug#11813: bug#11850: crash (null font) running emacs built from git

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Ah, sorry, forgot to mention it: there is a setting in menu called
"default font", trying some of the variants listed there I found two
which can render bold face (9x15 and 10x20), few more would print a
message saying that the font is not available:

set-face-attribute: Font not available: #<font-spec nil b&h
lucidatypewriter sans iso8859-1 medium r normal 12.0 nil nil nil
((:name . "-b&h-lucidatypewriter-medium-r-normal-sans-*-120-*-*-*-*-iso8859-1")
(user-spec . 
"-b&h-lucidatypewriter-medium-r-normal-sans-*-120-*-*-*-*-iso8859-1"))>

And the rest would display something similar to the image I attached
to the previous message, i.e. bold characters replaced by their codes.

Best.

Oleg