Re: scratch/igc 3f46110b878: Fix an eassert

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

Pip Cet <pipcet@protonmail.com> writes:

> "Gerd Moellmann" <gerd@gnu.org> writes:
>
>> branch: scratch/igc
>> commit 3f46110b878ef0940ad7c0a9eacd6ef441baad7d
>> Author: Gerd Möllmann <gerd@gnu.org>
>> Commit: Gerd Möllmann <gerd@gnu.org>
>>
>>     Fix an eassert
>> ---
>>  src/igc.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/src/igc.c b/src/igc.c
>> index b1ef6939b5f..2ce508e055e 100644
>> --- a/src/igc.c
>> +++ b/src/igc.c
>> @@ -2223,7 +2223,7 @@ fix_weak_hash_table_weak_part (mps_ss_t ss, struct Lisp_Weak_Hash_Table_Weak_Par
>>  	for (ssize_t i = 0; i < limit; i++)
>>  	  {
>>  	    if (w->entries[i].intptr & 1)
>> -	      eassert ((mps_word_t)w->entries[i].intptr ^ w->entries[i].intptr == 0);
>> +	      eassert ((mps_word_t)w->entries[i].intptr ^ (w->entries[i].intptr == 0));
>>  	    bool was_nil = (w->entries[i].intptr) == 0;
>>  	    intptr_t off = 0;
>>  #ifdef WORDS_BIGENDIAN
>
> I'm guessing I'm failing a basic C knowledge test here, but can you
> explain?  Did you run into an assertion error with the old code, or a
> compiler warning?

It was a warning from clang. So the right thing would be (x ^ y) == 0?