macOS (Big Sur, Apple Silicon) 'make check' fails in test-crypto-tlscredsx509

[Peter Maydell]

My Big Sur/Apple Silicon system fails "make check" in
test-crypto-tlscredsx509:

MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(( ${RANDOM:-0} % 255 + 1))}
G_TEST_SRCDIR=/Users/pm215/qemu/tests
G_TEST_BUILDDIR=/Users/pm215/qemu/build/all/tests
tests/test-crypto-tlscredsx509 --tap -k

** (tests/test-crypto-tlscredsx509:35180): CRITICAL **: 16:23:34.590:
Failed to sign certificate ASN1 parser: Value is not valid.
ERROR test-crypto-tlscredsx509 - Bail out! FATAL-CRITICAL: Failed to
sign certificate ASN1 parser: Value is not valid.
make: *** [run-test-70] Error 1


Does this failure ring any bells for anybody?

Here's the crypto part of the meson-log:

  Crypto
                     TLS priority: "NORMAL"
                   GNUTLS support: YES
                        libgcrypt: NO
                           nettle: YES
                              XTS: YES
                     crypto afalg: NO
                         rng-none: NO
                    Linux keyring: NO


thanks
-- PMM