https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95276
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The error is locale-dependent, at least somewhat. With the test case
I posted:
$ LANG="" gcc -S -O2 w-posted.i
In function 'ztoa_big',
inlined from 'write_z' at w-posted.i:6499:11:
w-posted.i:6484:6: warning: writing 1 byte into a region of size 0
[-Wstringop-overflow=]
6484 | *q = '\0';
| ~~~^~~~~~
w-posted.i: In function 'write_z':
w-posted.i:6495:8: note: at offset 0 to object 'itoa_buf' with size 33 declared
here
6495 | char itoa_buf[((sizeof (GFC_REAL_16)) * 2 + 1)];
| ^~~~~~~~
$ LANG="de_DE.UTF-8" gcc -S -O2 w-posted.i
w-posted.i: In Funktion »write_z«:
w-posted.i:6484:6: Warnung: Schreiben von 140096374336960 Byte in eine Region
der Größe 1 [-Wstringop-overflow=]
6484 | *q = '\0';
| ~~~^~~~~~
w-posted.i:6495:8: Anmerkung: bei Offset 0 zum Objekt »itoa_buf« mit Größe 33
wurde hier deklariert
6495 | char itoa_buf[((sizeof (GFC_REAL_16)) * 2 + 1)];
So, probably reading from uninitialized memory somewhere.
I think this should be enough to confirm this.
