go test -race os/exec fails on yakkety

As seen in http://paste.ubuntu.com/16058192/ -- going to retry to see if it goes away.

##### Testing race detector
ok runtime/race 3.802s
ok flag 1.058s
ok os/exec 2.035s
==25469==ERROR: ThreadSanitizer failed to allocate 0x2718000 (40992768) bytes at address 1fe628e1f8080 (errno: 12)
unexpected fault address 0x0
fatal error: fault
[signal 0x7 code=0x80 addr=0x0 pc=0x7f98a342e0d5]

goroutine 1 [running, locked to thread]:
runtime.throw(0x0, 0x7f98a3258d38)
 /«PKGBUILDDIR»/src/runtime/panic.go:547 +0x90 fp=0x7ffc46ccb750 sp=0x7ffc46ccb738

goroutine 17 [syscall, locked to thread]:
2016/04/26 00:31:09 Failed: exit status 1
runtime.goexit()
 /«PKGBUILDDIR»/src/runtime/asm_amd64.s:1998 +0x1 fp=0xc82003afb8 sp=0xc82003afb0
exit status 2
FAIL _/«PKGBUILDDIR»/misc/cgo/test 0.013s
2016/04/26 00:31:09 Failed: exit status 1
==24614==ERROR: ThreadSanitizer failed to allocate 0x26e8000 (40796160) bytes at address 1fe9c207ec080 (errno: 12)
unexpected fault address 0x0
fatal error: fault
[signal 0x7 code=0x80 addr=0x0 pc=0x7fa707e96075]

goroutine 1 [running, locked to thread]:
runtime.throw(0x0, 0x7fa707d6a308)
 /«PKGBUILDDIR»/src/runtime/panic.go:547 +0x90 fp=0x7ffe326f32a0 sp=0x7ffe326f3288

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
 /«PKGBUILDDIR»/src/runtime/asm_amd64.s:1998 +0x1
FAIL flag 0.054s
==24786==ERROR: ThreadSanitizer failed to allocate 0x2720000 (41025536) bytes at address 1fe78376bc080 (errno: 12)
unexpected fault address 0x0
fatal error: fault
[signal 0x7 code=0x80 addr=0x0 pc=0x7f9e0d849205]

goroutine 1 [running, locked to thread]:
runtime.throw(0x0, 0x7f9e0d499f18)
 /«PKGBUILDDIR»/src/runtime/panic.go:547 +0x90 fp=0x7ffd50a49a00 sp=0x7ffd50a499e8

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
 /«PKGBUILDDIR»/src/runtime/asm_amd64.s:1998 +0x1
FAIL os/exec 0.015s