[U-Boot] Very confusing variable=name behaviour

Hi!

I'm getting quite crazy behaviour of variables in recent u-boot:

VERSION = 2016 PATCHLEVEL = 01 SUBLEVEL = EXTRAVERSION = -rc1

Bytes transferred = 104656 (198d0 hex) => bootm_boot_mode=nonsec => echo $bootm_boot_mode nonsec => prinetenv bootm_boot_mode Unknown command 'prinetenv' - try 'help' => printenv bootm_boot_mode ## Error: "bootm_boot_mode" not defined => echo $bootm_boot_mode nonsec =>

What is going on there? C-level "getenv" fails on such variable, too.

bootm_boot_mode = '<NULL>'

Explicit setenv behaves as expected:

=> setenv bootm_boot_mode nonsec => echo $bootm_boot_mode nonsec => printenv bootm_boot_mode bootm_boot_mode=nonsec =>

Best regards,

Pavel