buildkernel failed - if_iwn.c: iwn_read_firmware (INVARIANTS again?)

I can't create new issue on bugs.dragonflybsd.org (Internal error in 
Redmine), so write message here.

$ cd /usr/src

$ uname -a
DragonFly px.bestmx.net 3.6-RELEASE DragonFly v3.6.0rc.1.g00b0e-RELEASE 
#0: Wed Nov  6 10:28:14 GMT 2013 
[email protected]:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64

$ git pull
Already up-to-date.

$ cat /etc/make.conf
NO_BINUTILS221=yes
NO_GCC44=yes

$ diff -u sys/config/X86_64_GENERIC sys/config/ANO
--- sys/config/X86_64_GENERIC   2013-11-06 08:31:18.000000000 +0000
+++ sys/config/ANO      2013-11-08 09:05:49.000000000 +0000
@@ -8,7 +8,7 @@
  machine                x86_64
  machine_arch   x86_64
  cpu            HAMMER_CPU
-ident          X86_64_GENERIC
+ident          ANO
  maxusers       0
  #options       CPU_DISABLE_AVX

@@ -63,7 +63,7 @@
  # Debugging for Development
  options        DDB
  options        DDB_TRACE
-options        INVARIANTS
+#options       INVARIANTS

  device         isa
  device         pci

$ make buildkernel KERNCONF=ANO
...
cc -c -O -pipe  -Wall -Wredundant-decls -Wnested-externs 
-Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline 
-Wcast-qual  -Wold-style-definition -Wold-style-declaration -Wno-inline 
  -Wno-pointer-sign -std=c99 -Wno-unused-but-set-variable -g -nostdinc 
-I. -Iinclude -I/usr/src/sys -I/usr/src/sys/../include 
-I/usr/obj/usr/src/sys/ANO -I"/usr/src/sys/dev/acpica" 
-I"/usr/src/sys/contrib/dev/acpica-unix/include" 
-I/usr/src/sys/dev/netif/ath/hal 
-I/usr/src/sys/dev/netif/ath/hal/ath_hal -I/usr/src/sys/dev/drm/include 
  -D_KERNEL -include opt_global.h  -finline-limit=8000 --param 
inline-unit-growth=100 --param large-function-growth=1000 -fno-common 
-ffreestanding -mpreferred-stack-boundary=4 -fno-stack-protector 
-mcmodel=kernel -mno-red-zone -mfpmath=387 -mno-mmx -mno-3dnow -mno-sse 
-mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -mno-sse4 
-mno-sse4a  -mno-sse5 -mno-abm -mno-aes -mno-avx -mno-pclmul -mno-popcnt 
-mno-avx2 -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-fma -mno-fma4 -mno-bmi 
-mno-bmi2 -mno-xop -mno-lwp -mno-lzcnt -mno-tbm -msoft-float 
-fno-asynchronous-unwind-tables -fno-omit-frame-pointer 
/usr/src/sys/dev/netif/iwn/if_iwn.c -Werror
/usr/src/sys/dev/netif/iwn/if_iwn.c: In function 'iwn_read_firmware':
/usr/src/sys/dev/netif/iwn/if_iwn.c:5676:2: error: implicit declaration 
of function 'IS_SERIALIZED' [-Werror=implicit-function-declaration]
/usr/src/sys/dev/netif/iwn/if_iwn.c:5676:2: error: nested extern 
declaration of 'IS_SERIALIZED' [-Werror=nested-externs]
cc1: all warnings being treated as errors
*** Error code 1

Stop.
make: stopped in /usr/obj/usr/src/sys/ANO
*** Error code 1

Stop.
make: stopped in /usr/src
.CURDIR='/usr/src'
.OBJDIR='/usr/obj/usr/src'
LD_LIBRARY_PATH=''
MACHINE_ARCH='x86_64'
MACHINE='x86_64'
MAKEFILE='/usr/src/Makefile.inc1'
.TARGETS='buildkernel'
.ERROR_TARGET='buildkernel'
.MAKE.LEVEL='1'
*** Error code 1

Stop.
make: stopped in /usr/src