go14 build failure

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

Just trying to build (current) lang/go14 on -current/amd64, I see:

===> Building for go14-1.4.3nb5
...

/doc
go/build
cmd/go
SIGSYS: bad system callpanic during panic

goroutine 0 [idle]:
runtime.startpanic_m()
        /usr/pkg/go14/src/runtime/panic.c:110 +0x108
runtime.onM_signalok(0x72a050)
        /usr/pkg/go14/src/runtime/asm_amd64.s:214 +0x2b
runtime.startpanic()
        /usr/pkg/go14/src/runtime/panic.go:469 +0x14
runtime.gothrow(0x6f55d0, 0x20)
        /usr/pkg/go14/src/runtime/panic.go:501 +0x35
runtime.badonm()
        /usr/pkg/go14/src/runtime/stubs.go:95 +0x34
runtime.onM(0xc208089b38)
        /usr/pkg/go14/src/runtime/asm_amd64.s:235 +0x2f
runtime.semasleep(0xffffffffffffffff, 0x1)
        /usr/pkg/go14/src/runtime/os_netbsd.c:151 +0x60
runtime.lock(0x8018e8)

        PC=/usr/pkg/go14/src/runtime/lock_sema.go0x4a533a:
90

and lots more output available if useful...

Anyone else see this?

Cheers,

Patrick