On Wed, May 27, 2026 at 10:32:08AM +0200, Dan Horák wrote:
> On Wed, 27 May 2026 10:21:13 +0200
> Pavol Sloboda <[email protected]> wrote:
>
> > Hello,
> >
> > I believe I have encountered a similar/the same issue but for me it
> > triggers on all the architectures:
>
> the icu rebuild is run with "fail_fast = True", so not all build tasks
> are allowed to really finish, they are cancelled after a first fail
> instead.
I've managed to reproduce the boost ICE on i686, but it is really weird.
The ICE is within mpfr:
#0 0x00000000 in ?? ()
#1 0xf7ee9537 in mpfr_cache (dest=0xffffaeec, cache=0xf79effd4, rnd=MPFR_RNDU)
at /usr/src/debug/mpfr-4.2.2-3.fc44.i386/src/cache.c:102
#2 0xf7ec20b3 in mpfr_exp2 (y=0xffffaff0, x=0xffffaf78, rnd_mode=MPFR_RNDN) at
/usr/src/debug/mpfr-4.2.2-3.fc44.i386/src/exp2.c:141
#3 0xf7ed343a in mpfr_pow (z=0xffffaff0, x=0xffffaff0, y=0xffffafe0,
rnd_mode=MPFR_RNDN) at /usr/src/debug/mpfr-4.2.2-3.fc44.i386/src/pow.c:665
#4 0x09797f41 in do_mpfr_arg2(real_value*, int (*)(__mpfr_struct*,
__mpfr_struct const*, __mpfr_struct const*, mpfr_rnd_t), real_value const*,
real_value const*, real_format const*) [clone .lto_priv.0] ()
#5 0x09797a66 in fold_const_call_sss(real_value*, combined_fn, real_value
const*, real_value const*, real_format const*) [clone .lto_priv.0] ()
#6 0x0909e6a1 in fold_const_call_1(combined_fn, tree_node*, tree_node*,
tree_node*) [clone .lto_priv.0] [clone .cold] ()
#7 0x0a089231 in fold_builtin_n(unsigned long long, tree_node*, tree_node*,
tree_node**, int, bool) [clone .isra.0] ()
but reproduces only in f45 and not in f44, gcc is the same source
(gcc-16.1.1-2.fc{45,44}), mpfr is even exactly the same (mpfr-4.2.2-3.fc44),
gmp is also exactly the same.
Reproducer can be even e.g. just
echo 'double a = __builtin_log (60e6);' > test.c
gcc test.c
Wonder if something hasn't changed on the glibc side...
Jakub
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