[m-dev.] new failures of putback tests

[Julien Fischer]

On Wed, 23 Dec 2020, Zoltan Somogyi wrote:

> 2020-12-23 11:13 GMT+11:00 "Julien Fischer" <jfischer at opturion.com>:
>> No, it is not a known issue. The grade in the attached file was none.gc
>> not hlc.gc; is the problem occuring with the former, latter or both?
>
> The bootcheck in hlc.gc just finished: it gets the exact same three failures
> as the none.gc bootcheck did.

I just did a bootcheck in hlc.gc on Mojave and all tests passed (that's
Apple clang-1001.0.46.4).  I'm currently doing a bootcheck in none.gc,
but I expect that will pass as well.

I suggest bootchecking again with C compiler optimizations disabled,
and if you have access to a non-Apple C compiler, trying that.

(Mind you, I'm sure it's not beyond Apple's igenuity to break ungetc()
...)

Julien.