//This was posted by @grothoff on gcrypt-devel in 2018 and materialized again at their tracker yesterday. It is likely that we forgot about this given that there was no followup on the ML.//
Just a quick crash report:
libgcrypt from git master causes an assertion on my AMD 1950X when
running GNUnet's src/util/test_crypto_ecc_dlog logic:
```
.Ohhhh jeeee: mulm_25519: different sizes
FAIL test_crypto_ecc_dlog (exit status: 134)
With GDB:
.Ohhhh jeeee: mulm_25519: different sizes
Program received signal SIGABRT, Aborted.
__GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) ba
#0 __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1 0x00007ffff7b242f1 in __GI_abort () at abort.c:79
#2 0x00007ffff7e8e587 in _gcry_logv (level=50, fmt=0x7ffff7f2c4a4
"mulm_25519: different sizes\n", arg_ptr=0x7fffffffdd18) at misc.c:142
#3 0x00007ffff7e8e94d in _gcry_log_bug (fmt=0x7ffff7f2c4a4 "mulm_25519:
different sizes\n") at misc.c:229
#4 0x00007ffff7f157b1 in ec_mulm_25519 (w=0x55555555a1f0,
u=0x55555555b6d0, v=0x55555555b630, ctx=0x55555555a010) at ec.c:431
#5 0x00007ffff7f1760d in add_points_edwards (result=0x55555555b8a0,
p1=0x55555555b670, p2=0x55555555b750, ctx=0x55555555a010) at ec.c:1305
#6 0x00007ffff7f17cc7 in _gcry_mpi_ec_add_points
(result=0x55555555b8a0, p1=0x55555555b670, p2=0x55555555b750,
ctx=0x55555555a010) at ec.c:1416
#7 0x00007ffff7e8c659 in gcry_mpi_ec_add (w=0x55555555b8a0,
u=0x55555555b670, v=0x55555555b750, ctx=0x55555555a000) at visibility.c:580
#8 0x00007ffff7f70fd9 in GNUNET_CRYPTO_ecc_dlog (edc=0x555555559bd0,
input=0x55555555b670) at crypto_ecc_dlog.c:259
#9 0x0000555555555580 in test_dlog (edc=0x555555559bd0) at
test_crypto_ecc_dlog.c:99
#10 0x0000555555555972 in main (argc=1, argv=0x7fffffffe138) at
test_crypto_ecc_dlog.c:186
```
Note that on the same system using Debian's 1.8.3-1 package things work,
so either it is the build or a regression.
I used:
./configure --prefix=/home/grothoff
--with-libgpg-error-prefix=/home/grothoff --enable-ciphers="blowfish aes
twofish" --enable-digests="crc md5 sha1 sha256 sha512"
--enable-kdfs=scrypt CFLAGS=-g -O0 -Wall