Re: Problems setting byte-compile-warnings to t

[Richard Stallman]

    So the simplest fix would seem to adjust the buffer-local value in
    inbuffer in the same way that byte-compile-close-variables does.

I see a problem with that: such a change would persist after the end
of the compilation.

Here's another idea: add a function byte-compile-memq which always
returns t if the second arg is t, and use that instead of memq to test
membership in byte-compile-warnings.  That avoids the need to alter
data provided by the user.  Do you see any problem with it?