[Nexus 5X General] pixbuf:
Arrghhh! So, the new November update came out today: nrd91n. I tried flashing it the regular way (flash-all script), but when it tried to flash the system image, I got an error message saying the data was too big.

target reported max download size of 536870912 bytes
sending 'bootloader' (4603 KB)...
OKAY [ 0.189s]
writing 'bootloader'...
OKAY [ 0.141s]
finished. total time: 0.331s
rebooting into bootloader...
OKAY [ 0.008s]
finished. total time: 0.008s
target reported max download size of 536870912 bytes
sending 'radio' (56758 KB)...
OKAY [ 1.383s]
writing 'radio'...
OKAY [ 0.505s]
finished. total time: 1.889s
rebooting into bootloader...
OKAY [ 0.008s]
finished. total time: 0.008s
target reported max download size of 536870912 bytes
sending 'boot' (12025 KB)...
OKAY [ 0.365s]
writing 'boot'...
OKAY [ 0.117s]
finished. total time: 0.483s
******** Did you mean to fastboot format this partition?
erasing 'cache'...
OKAY [ 0.083s]
finished. total time: 0.083s
target reported max download size of 536870912 bytes
erasing 'cache'...
OKAY [ 0.084s]
sending 'cache' (5688 KB)...
OKAY [ 0.215s]
writing 'cache'...
OKAY [ 0.076s]
finished. total time: 0.375s
target reported max download size of 536870912 bytes
sending 'recovery' (16149 KB)...
OKAY [ 0.441s]
writing 'recovery'...
OKAY [ 0.142s]
finished. total time: 0.583s
target reported max download size of 536870912 bytes
erasing 'system'...
OKAY [ 0.120s]
sending sparse 'system' (514493 KB)...
OKAY [ 12.207s]
writing 'system'...
OKAY [ 5.542s]
sending sparse 'system' (514543 KB)...
OKAY [ 12.382s]
writing 'system'...
OKAY [ 5.496s]
sending sparse 'system' (524291 KB)...
FAILED (remote: data too large)
finished. total time: 35.759s
target reported max download size of 536870912 bytes
erasing 'vendor'...
OKAY [ 0.109s]
sending 'vendor' (194198 KB)...
OKAY [ 4.697s]
writing 'vendor'...
OKAY [ 2.429s]
finished. total time: 7.236s

The phone would not boot up; it's stuck on the Google screen. Then I tried using the flash-all script that comes with the zip file. It's a little different from what has been in there before, but that one gave me error: "update package missing system.img". But

unzip -t image-bullhead-nrd91n.zip
Archive: image-bullhead-nrd91n.zip
testing: android-info.txt OK
testing: system.img OK
testing: boot.img OK
testing: vendor.img OK
testing: recovery.img OK
testing: cache.img OK
testing: userdata.img OK
No errors detected in compressed data of image-bullhead-nrd91n.zip.

My phone is completely useless now. I have a nandroid backup but it's from last July.

Arrgghhh again.

Update: I did a factory reset, but I still get the same error.

Update 2: When I flashed SuperSU in recovery I get this error:

Failed to mount '/system'. (Invalid argument)

Update 3: I flashed the October release and it worked fine. But then I thought since I lost all my data anyway, I might was well try and install the 7.1.1 developer's preview. But I got the same kind of error:

target reported max download size of 536870912 bytes
archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
failed to allocate -1493434876 bytes
error: update package missing system.img

Go figure.