[Bug mi/34501] gdb responds with corrupt output on trying to inserting a breakpoint

https://sourceware.org/bugzilla/show_bug.cgi?id=34501

--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
I managed to reproduce this, with current gdb built at O0, and:
...
$ gdb \
    -q \
    -ex 'set charset UTF-8' \
    -ex 'interpreter-exec mi2 "-break-insert -f foo' \
    -ex quit
...

Using "set style emoji off" fixes this for me.

So, the prefix you're seeing is the error-prefix:
...
(gdb) show style error-prefix
Error prefix is "❌️ ".
...

Whether there's a bug in gdb or not, I'm not sure.

But if so, it's simply a usability bug of the type "don't use emojis in MI" or
something like that.

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