[PATCH v2] Avoid self-test failures on x86-linux

[Luis Machado]

On 10/29/21 11:47 AM, Tom Tromey wrote:
> Luis> Isn't this a broader issue? I recently reported some failures in the
> Luis> gdb.base/all-architectures-2.exp, where disassembling fails due to
> Luis> (apparently) some recent changes in error reporting.
> 
> Do you have a link?

I haven't filed a PR yet. I pinged Andrew about it on IRC to check if 
that was intended behavior or not.
> 
> I've only run into this particular problem, and when I wrote the fix, I
> looked through opcodes to find other similar instances, and didn't find
> any.

It is not immediately obvious that the gdb.base/all-architectures*.exp 
failures are related to disassembler self tests. I wouldn't expect so, 
given those tests invoke "disassemble" explicitly.