[Google Pixel XL Questions & Answers] cosau:
Pie 9.0 with Magisk root then relock bootloader cause this :(

(bootloader) version:0.5

(bootloader) hw-revision:PVT

(bootloader) mid:G-2PW2200

(bootloader) version-main:4.27.1700.10

(bootloader) imei:352677080385593

(bootloader) ramdump-mode:false

(bootloader) boot-mode:FASTBOOT

(bootloader) has-slot:radio:yes

(bootloader) has-slot:bootloader:yes

(bootloader) has-slot:reserve5:no

(bootloader) has-slot:devinfo:no

(bootloader) has-slot:fsg:no

(bootloader) has-slot:mfg:no

(bootloader) has-slot:board_info:no

(bootloader) has-slot:reserve4:no

(bootloader) has-slot:metadata:no

(bootloader) has-slot:pg2fs:no

(bootloader) has-slot:pg1fs:no

(bootloader) has-slot:ramdump:no

(bootloader) has-slot:frp:no

(bootloader) has-slot:reserve3:no

(bootloader) has-slot:cdt:no

(bootloader) has-slot:ddr:no

(bootloader) has-slot:modemst2:no

(bootloader) has-slot:modemst1:no

(bootloader) has-slot:fsc:no

(bootloader) has-slot:dip:no

(bootloader) has-slot:dpo:no

(bootloader) has-slot:devinfobak:no

(bootloader) has-slot:sec:no

(bootloader) has-slot:persist:no

(bootloader) has-slot:ssd:no

(bootloader) has-slot:misc:no

(bootloader) has-slot:xbl:yes

(bootloader) has-slot:reserve0:no

(bootloader) has-slot:userdata:no

(bootloader) has-slot:system:yes

(bootloader) has-slot:vendor:yes

(bootloader) has-slot:apdp:yes

(bootloader) has-slot:msadp:yes

(bootloader) has-slot:modem:yes

(bootloader) has-slot:devcfg:yes

(bootloader) has-slot:hosd:yes

(bootloader) has-slot:boot:yes

(bootloader) has-slot:aboot:yes

(bootloader) has-slot:cmnlib64:yes

(bootloader) has-slot:cmnlib32:yes

(bootloader) has-slot:hyp:yes

(bootloader) has-slot:pmic:yes

(bootloader) has-slot:rpm:yes

(bootloader) has-slot:tz:yes

(bootloader) has-slot:keymaster:yes

(bootloader) has-slot:bootlocker:yes

(bootloader) slot-count:2

(bootloader) current-slot:a

(bootloader) slot-retry-count:b:1

(bootloader) slot-unbootable:b:no

(bootloader) slot-successful:b:no

(bootloader) slot-retry-count:a:2

(bootloader) slot-unbootable:a:no

(bootloader) slot-successful:a:yes

(bootloader) battery-soc-ok:yes

(bootloader) battery-voltage:4155000

(bootloader) variant:ROW

(bootloader) secure:yes

(bootloader) unlocked:no

(bootloader) version-baseband:8996-130181-1808270817

(bootloader) version-bootloader:8996-012001-1811131534

(bootloader) off-mode-charge:1

(bootloader) charger-screen-enabled:1

(bootloader) max-download-size:	0x20000000

(bootloader) partition-type:userdata:ext4

(bootloader) partition-size:userdata:	0x1c8d800000

(bootloader) partition-type:system_b:ext4

(bootloader) partition-size:system_b:	0x80000000

(bootloader) partition-type:system_a:ext4

(bootloader) partition-size:system_a:	0x80000000

(bootloader) partition-type:vendor_b:ext4

(bootloader) partition-size:vendor_b:	0x12c00000

(bootloader) partition-type:vendor_a:ext4

(bootloader) partition-size:vendor_a:	0x12c00000

(bootloader) partition-type:boot_b:raw

(bootloader) partition-size:boot_b:	0x2000000

(bootloader) partition-type:boot_a:raw

(bootloader) partition-size:boot_a:	0x2000000

(bootloader) serialno:HT73A0201862

(bootloader) kernel:lk

(bootloader) product:marlin

how can i flash a raw boot partition with device locked