build: crashes during compilation on mips64le hw #16848

I'm using go version devel +392bf3a (Tue Aug 9 00:43:25 2016 +0000 linux/mips64le).
I have build bootstrap for mips64le on intel, copied it to mips board, and then started compiling with following command:
GOROOT_BOOTSTRAP=/home/nikola/go/ GOROOT_FINAL=/home/nikola/go_final ./make.bash
Here's what I get:

Building Go bootstrap tool.

cmd/dist

Building Go toolchain using /home/nikola/go.

runtime: newstack sp=0xc42003f448 stack=[0xc42003e000, 0xc42003ffc0]
morebuf={pc:0x52edc sp:0xc42003f448 lr:0x0}
sched={pc:0x525b4 sp:0xc42003f448 lr:0x52edc ctxt:0x0}
strings.Join(0xc420403000, 0x6c7, 0x6c7, 0x0, 0x0, 0x0, 0x0)
/home/nikola/go_final/src/strings/strings.go:364 +0x170
main.bootstrapFixImports(0xc420440000, 0x8031, 0xc420345350, 0x2c, 0x0, 0x0)
/opt/go/src/cmd/dist/buildtool.go:156 +0x2c8
main.bootstrapBuildTools()
/opt/go/src/cmd/dist/buildtool.go:92 +0x8ac
main.cmdbootstrap()
/opt/go/src/cmd/dist/build.go:1022 +0x2f8
main.xmain()
/opt/go/src/cmd/dist/main.go:43 +0x28c
main.main()
/opt/go/src/cmd/dist/util.go:496 +0x708
fatal error: runtime: stack split at bad time

runtime stack:
runtime.throw(0x1c9d8b, 0x20)
/home/nikola/go_final/src/runtime/panic.go:566 +0xb8
runtime.newstack()
/home/nikola/go_final/src/runtime/stack.go:951 +0x600
runtime.morestack()
/home/nikola/go_final/src/runtime/asm_mips64x.s:275 +0x60

goroutine 1 [syscall]:
runtime.notetsleep_internal(0x27a670, 0xffffffffffffffff, 0xc42003f4a8)
/home/nikola/go_final/src/runtime/lock_futex.go:159 +0x44 fp=0xc42003f478 sp=0xc42003f448
runtime.notetsleepg(0x27a670, 0xffffffffffffffff, 0xc420018000)
/home/nikola/go_final/src/runtime/lock_futex.go:206 +0x90 fp=0xc42003f4a0 sp=0xc42003f478
runtime.gcBgMarkStartWorkers()
/home/nikola/go_final/src/runtime/mgc.go:1341 +0xfc fp=0xc42003f4d8 sp=0xc42003f4a0
runtime.gcStart(0x0, 0xc42044a000)
/home/nikola/go_final/src/runtime/mgc.go:949 +0x1fc fp=0xc42003f500 sp=0xc42003f4d8
runtime.mallocgc(0xa000, 0x196080, 0xc42007a401, 0xc42007a4d0)
/home/nikola/go_final/src/runtime/malloc.go:752 +0x5d8 fp=0xc42003f5b0 sp=0xc42003f500
runtime.makeslice(0x196080, 0x80c9, 0x80c9, 0x0, 0x0, 0x0)
/home/nikola/go_final/src/runtime/slice.go:57 +0xf0 fp=0xc42003f600 sp=0xc42003f5b0
strings.Join(0xc420403000, 0x6c7, 0x6c7, 0x0, 0x0, 0x0, 0x0)
/home/nikola/go_final/src/strings/strings.go:364 +0x170 fp=0xc42003f730 sp=0xc42003f600
main.bootstrapFixImports(0xc420440000, 0x8031, 0xc420345350, 0x2c, 0x0, 0x0)
/opt/go/src/cmd/dist/buildtool.go:156 +0x2c8 fp=0xc42003f858 sp=0xc42003f730
main.bootstrapBuildTools()
/opt/go/src/cmd/dist/buildtool.go:92 +0x8ac fp=0xc42003fbc8 sp=0xc42003f858
main.cmdbootstrap()
/opt/go/src/cmd/dist/build.go:1022 +0x2f8 fp=0xc42003fcf8 sp=0xc42003fbc8
main.xmain()
/opt/go/src/cmd/dist/main.go:43 +0x28c fp=0xc42003fdf0 sp=0xc42003fcf8
main.main()
/opt/go/src/cmd/dist/util.go:496 +0x708 fp=0xc42003ff50 sp=0xc42003fdf0
runtime.main()
/home/nikola/go_final/src/runtime/proc.go:183 +0x2f4 fp=0xc42003ff98 sp=0xc42003ff50
runtime.goexit()
/home/nikola/go_final/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc42003ff98 sp=0xc42003ff98

goroutine 6 [select]:
main.bghelper()
/opt/go/src/cmd/dist/util.go:150 +0x200
created by main.bginit
/opt/go/src/cmd/dist/util.go:143 +0x98

goroutine 7 [select]:
main.bghelper()
/opt/go/src/cmd/dist/util.go:150 +0x200
created by main.bginit
/opt/go/src/cmd/dist/util.go:143 +0x98

goroutine 8 [select]:
main.bghelper()
/opt/go/src/cmd/dist/util.go:150 +0x200
created by main.bginit
/opt/go/src/cmd/dist/util.go:143 +0x98

goroutine 9 [select]:
main.bghelper()
/opt/go/src/cmd/dist/util.go:150 +0x200
created by main.bginit
/opt/go/src/cmd/dist/util.go:143 +0x98