Coq fails to compile when Ocaml is built with -Ofast

[LemonBreezes]

The respective packages are:
dev-lang/ocaml-4.14.0:0/4.14::gentoo USE="ocamlopt -emacs -flambda -latex -xemacs"
sci-mathematics/coq-8.15.1::gentoo USE="ocamlopt -debug -doc -gtk"

and my system info is:
Portage 3.0.30 (python 3.9.12-final-0, default/linux/amd64/17.1, gcc-11.3.0, glibc-2.35-r4, 5.17.4-gentoo x86_64)

                     System Settings

=================================================================
System uname: Linux-5.17.4-gentoo-x86_64-Intel-R-_Core-TM-i9-9900K_CPU@_3.60GHz-with-glibc2.35
KiB Mem: 49210600 total, 27035252 free
KiB Swap: 0 total, 0 free
Timestamp of repository gentoo: Sun, 08 May 2022 16:48:51 +0000
Head commit of repository gentoo: ac190c307cbe5941e71f21ae7c0b181d23f310eb

sh bash 5.1_p16
ld GNU ld (Gentoo 2.38 p4) 2.38
ccache version 4.6 [disabled]
app-misc/pax-utils: 1.3.4::gentoo
app-shells/bash: 5.1_p16::gentoo
dev-lang/perl: 5.34.1-r3::gentoo
dev-lang/python: 3.9.12::gentoo, 3.10.4::gentoo
dev-lang/rust: 1.60.0::gentoo
dev-util/ccache: 4.6-r1::gentoo
dev-util/cmake: 3.23.1::gentoo
dev-util/meson: 0.61.4-r2::gentoo
sys-apps/baselayout: 2.8::gentoo
sys-apps/openrc: 0.44.10::gentoo
sys-apps/sandbox: 2.29::gentoo
sys-devel/autoconf: 2.71-r1::gentoo
sys-devel/automake: 1.16.5::gentoo
sys-devel/binutils: 2.38-r2::gentoo
sys-devel/binutils-config: 5.4.1::gentoo
sys-devel/gcc: 11.3.0::gentoo
sys-devel/gcc-config: 2.5-r1::gentoo
sys-devel/libtool: 2.4.7::gentoo
sys-devel/llvm: 14.0.3::gentoo
sys-devel/make: 4.3::gentoo
sys-kernel/linux-headers: 5.17-r1::gentoo (virtual/os-headers)
sys-libs/glibc: 2.35-r4::gentoo
Repositories:

gentoo
location: /var/db/repos/gentoo
sync-type: git
sync-uri: git://anongit.gentoo.org/repo/sync/gentoo.git
priority: -1000
sync-git-verify-commit-signature: yes

guru
location: /var/lib/layman/guru
masters: gentoo
priority: 50

lto-overlay
location: /var/lib/layman/lto-overlay
masters: gentoo mv
priority: 50

mv
location: /var/lib/layman/mv
masters: gentoo
priority: 50

robertgzr
location: /var/lib/layman/robertgzr
masters: gentoo
priority: 50

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="@free"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -Ofast -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=16 -fuse-linker-plugin -falign-functions=32 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -Ofast -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=16 -fuse-linker-plugin -falign-functions=32 -pipe"
DISTDIR="/var/cache/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=16 --load-average=16"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
FCFLAGS="-march=native -Ofast -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=16 -fuse-linker-plugin -falign-functions=32 -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=native -Ofast -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=16 -fuse-linker-plugin -falign-functions=32 -pipe"
GENTOO_MIRRORS="http://www.gtlib.gatech.edu/pub/gentoo rsync://rsync.gtlib.gatech.edu/gentoo https://gentoo.osuosl.org/ http://gentoo.osuosl.org/ http://gentoo.mirrors.pair.com/ https://mirrors.rit.edu/gentoo/ http://mirrors.rit.edu/gentoo/ ftp://mirrors.rit.edu/gentoo/ rsync://mirrors.rit.edu/gentoo/ http://gentoo.mirrors.tds.net/gentoo"
LANG="en_US.utf8"
LC_ALL="en_US.utf8"
LDFLAGS="-march=native -Ofast -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=16 -fuse-linker-plugin -falign-functions=32 -pipe -Wl,-Ofast -Wl,--sort-common -Wl,--as-needed -fuse-linker-plugin"
MAKEOPTS="NATIVE_FULL_AOT=1 -j16 -l16"
PKGDIR="/var/cache/binpkgs"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
RUSTFLAGS="-C target-cpu=skylake"
SHELL="/bin/zsh"
USE="X acl alsa amd64 bzip2 cli crypt cups dri fortran gdbm iconv ipv6 libglvnd libtirpc multilib ncurses nptl openmp pam pcre readline seccomp split-usr ssl truetype unicode vaapi xattr xinerama xvmc zlib" ABI_X86="64" ADA_TARGET="gnat_2020" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4 php8-0" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_9" PYTHON_TARGETS="python3_9" RUBY_TARGETS="ruby26 ruby27" USERLAND="GNU" VIDEO_CARDS="intel i965 iris" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LD, LEX, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RANLIB, READELF, SIZE, STRINGS, STRIP, YACC, YFLAGS