crash when adding IMAP folder

Hello,

I've got a problem opening IMAP subfolders after upgrading to dovecot 2.4. Inbox and first level
subfolders open OK, any more nested folders give me this:

2025-11-03 23:41:57: Could not open mailbox 'IMAP Server/INBOX/Linux/apcupsd'.
2025-11-03 23:41:57: The folder 'IMAP Server/INBOX/Linux/apcupsd' cannot be opened, it only contains 
the other folders and not the messages.
Please select "Browse" from the menu instead to add its subfolders to the folder tree.

If you believe this message to be incorrect, you may reset "Can be opened" flag in the
folder properties dialog and try again.

After this Type=262147 changes to Type=1310723 in M config file.

So I deleted ~/.M and when I try to create IMAP foder in M it crashes:

Thread 1 "M" received signal SIGSEGV, Segmentation fault.
0x0000000000634ed2 in reKey (key=0x7fffffff5c00) at .src/util/twofish2.c:728
728		}
Missing rpms, try: dnf --enablerepo='*debug*' install libxcrypt-debuginfo-4.4.38-10.fc43.x86_64 
pam-libs-debuginfo-1.7.1-3.fc43.x86_64 openssl-libs-debuginfo-3.5.4-1.fc43.x86_64 
libstdc++-debuginfo-15.2.1-3.fc43.x86_64 glibc-debuginfo-2.42-4.fc43.x86_64 
libgcc-debuginfo-15.2.1-3.fc43.x86_64 gtk3-debuginfo-3.24.51-2.fc43.x86_64 
zlib-ng-compat-debuginfo-2.2.5-2.fc43.x86_64 pango-debuginfo-1.57.0-1.fc43.x86_64 
harfbuzz-debuginfo-11.5.1-1.fc43.x86_64 atk-debuginfo-2.58.1-1.fc43.x86_64 
cairo-gobject-debuginfo-1.18.4-2.fc43.x86_64 cairo-debuginfo-1.18.4-2.fc43.x86_64 
gdk-pixbuf2-debuginfo-2.44.4-1.fc43.x86_64 glib2-debuginfo-2.86.1-1.fc43.x86_64 
libX11-debuginfo-1.8.12-1.fc43.x86_64 libwayland-client-debuginfo-1.24.0-1.fc43.x86_64 
libXxf86vm-debuginfo-1.1.6-3.fc43.x86_64 libSM-debuginfo-1.2.5-3.fc43.x86_64 
libxkbcommon-debuginfo-1.11.0-1.fc43.x86_64 libnotify-debuginfo-0.8.7-1.fc43.x86_64 
libXtst-debuginfo-1.2.5-3.fc43.x86_64 freetype-debuginfo-2.13.3-3.fc43.x86_64 
fontconfig-debuginfo-2.17.0-3.fc43.x86_64 libpng-debuginfo-1.6.50-2.fc43.x86_64 
libjpeg-turbo-debuginfo-3.1.2-1.fc43.x86_64 libtiff-debuginfo-4.7.0-8.fc43.x86_64 
libwebp-debuginfo-1.6.0-2.fc43.x86_64 pcre2-utf32-debuginfo-10.46-1.fc43.x86_64 
libcurl-debuginfo-8.15.0-2.fc43.x86_64 expat-debuginfo-2.7.2-1.fc43.x86_64 
audit-libs-debuginfo-4.1.2-2.fc43.x86_64 libeconf-debuginfo-0.7.9-2.fc43.x86_64 
fribidi-debuginfo-1.0.16-3.fc43.x86_64 libepoxy-debuginfo-1.5.10-11.fc43.x86_64 
libXi-debuginfo-1.8.2-3.fc43.x86_64 at-spi2-atk-debuginfo-2.58.1-1.fc43.x86_64 
libcloudproviders-debuginfo-0.3.6-2.fc43.x86_64 libtinysparql-debuginfo-3.10.1-1.fc43.x86_64 
libXfixes-debuginfo-6.0.1-6.fc43.x86_64 libwayland-cursor-debuginfo-1.24.0-1.fc43.x86_64 
libwayland-egl-debuginfo-1.24.0-1.fc43.x86_64 libXext-debuginfo-1.3.6-4.fc43.x86_64 
libXcursor-debuginfo-1.2.3-3.fc43.x86_64 libXdamage-debuginfo-1.1.6-6.fc43.x86_64 
libXcomposite-debuginfo-0.4.6-6.fc43.x86_64 libXrandr-debuginfo-1.5.4-6.fc43.x86_64 
libXinerama-debuginfo-1.1.5-9.fc43.x86_64 libthai-debuginfo-0.1.29-11.fc43.x86_64 
graphite2-debuginfo-1.3.14-19.fc43.x86_64 libXrender-debuginfo-0.9.12-3.fc43.x86_64 
libxcb-debuginfo-1.17.0-6.fc43.x86_64 pixman-debuginfo-0.46.2-2.fc43.x86_64 
glycin-libs-debuginfo-2.0.3-1.fc43.x86_64 libmount-debuginfo-2.41.1-17.fc43.x86_64 
libselinux-debuginfo-3.9-5.fc43.x86_64 libffi-debuginfo-3.5.1-2.fc43.x86_64 
pcre2-debuginfo-10.46-1.fc43.x86_64 libICE-debuginfo-1.1.2-3.fc43.x86_64 
libuuid-debuginfo-2.41.1-17.fc43.x86_64 bzip2-libs-debuginfo-1.0.8-21.fc43.x86_64 
libbrotli-debuginfo-1.1.0-10.fc43.x86_64 libxml2-debuginfo-2.12.10-5.fc43.x86_64 
libzstd-debuginfo-1.5.7-2.fc43.x86_64 liblerc-debuginfo-4.0.0-9.fc43.x86_64 
jbigkit-libs-debuginfo-2.1-32.fc43.x86_64 libnghttp2-debuginfo-1.66.0-2.fc43.x86_64 
libidn2-debuginfo-2.3.8-2.fc43.x86_64 openldap-debuginfo-2.6.10-4.fc43.x86_64 
libssh-debuginfo-0.11.3-1.fc43.x86_64 libpsl-debuginfo-0.21.5-6.fc43.x86_64 
krb5-libs-debuginfo-1.21.3-7.fc43.x86_64 libcap-ng-debuginfo-0.8.5-8.fc43.x86_64 
at-spi2-core-debuginfo-2.58.1-1.fc43.x86_64 dbus-libs-debuginfo-1.16.0-4.fc43.x86_64 
json-glib-debuginfo-1.10.8-1.fc43.x86_64 sqlite-libs-debuginfo-3.50.2-2.fc43.x86_64 
libdatrie-debuginfo-0.2.13-12.fc43.x86_64 libXau-debuginfo-1.0.12-3.fc43.x86_64 
lcms2-debuginfo-2.16-6.fc43.x86_64 libseccomp-debuginfo-2.6.0-2.fc43.x86_64 
libblkid-debuginfo-2.41.1-17.fc43.x86_64 xz-libs-debuginfo-5.8.1-2.fc43.x86_64 
libunistring-debuginfo-1.1-10.fc43.x86_64 libevent-debuginfo-2.1.12-16.fc43.x86_64 
cyrus-sasl-lib-debuginfo-2.1.28-33.fc43.x86_64 libcom_err-debuginfo-1.47.3-2.fc43.x86_64 
keyutils-libs-debuginfo-1.6.3-6.fc43.x86_64 systemd-libs-debuginfo-258.1-1.fc43.x86_64 
libcap-debuginfo-2.76-3.fc43.x86_64 dconf-debuginfo-0.49.0-1.fc43.x86_64 
gvfs-client-debuginfo-1.58.0-1.fc43.x86_64 gdk-pixbuf2-modules-extra-debuginfo-2.44.0-1.fc43.x86_64 
libcanberra-gtk3-debuginfo-0.30-38.fc43.x86_64 libcanberra-debuginfo-0.30-38.fc43.x86_64 
libvorbis-debuginfo-1.3.7-13.fc43.x86_64 libtdb-debuginfo-1.4.14-3.fc43.x86_64 
libtool-ltdl-debuginfo-2.5.4-7.fc43.x86_64 libogg-debuginfo-1.3.6-2.fc43.x86_64 
PackageKit-gtk3-module-debuginfo-1.3.1-6.fc43.x86_64
(gdb) bt
#0  0x0000000000634ed2 in reKey (key=0x7fffffff5c00) at .src/util/twofish2.c:728
#1  0x5778772f5d3f713f in ??? ()
#2  0x332e73777f747e79 in ??? ()
#3  0x6764695768673f23 in ??? ()
#4  0x6c636e693f636475 in ??? ()
#5  0x732f78773f757465 in ??? ()
#6  0x6772617271666264 in ??? ()
#7  0x000000001010783e in ??? ()
#8  0x0000000210101010 in ??? ()
#9  0x0000005910101035 in ??? ()
#10 0x000000251010103d in ??? ()
#11 0x0000002d1010107d in ??? ()
#12 0x00000000000000ff in ??? ()
#13 0x0000000000000000 in ??? ()

I did not download any additional debuginfos, should I?

Regards,
Nerijus