bug#42904: [PATCH] Non-Unicode frame title crashes Emacs on macOS

[Mattias Engdegård]

21 aug. 2020 kl. 15.26 skrev Eli Zaretskii <eliz@gnu.org>:

> That is true, but str_as_multibyte simply interprets any valid UTF-8
> sequence as a character, and any invalid sequence as a raw bytes.  I
> thought this was precisely what you wanted for this use case, no?

Sorry, I read the comment for that function and got the impression that it 
would interpret raw bytes as Latin-1. Fortunately that wasn't true, and using 
it seems to be a clear improvement. Now a mixture of non-ASCII and raw bytes, 
like "a\377büc" results in the title "a��büc", which is one � too many but good 
enough.

What about the attached patch then? Only tested on macOS, admittedly.

0001-Always-make-a-multibyte-string-for-the-frame-title-b.patch
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