go test ./... fails

[xcthulhu]

When I try to run tests, I get the following failure

$ go test ./...
?       github.com/ethereum/ethash  [no test files]
2015/03/16 11:30:22 Block Number:  5
2015/03/16 11:30:22 difficulty 10000
--- FAIL: TestEthash (1.75s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
    panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x4175c72]

goroutine 6 [running]:
testing.func·006()
    /usr/local/Cellar/go/1.4.2/libexec/src/testing/testing.go:441 +0x181
github.com/ethereum/ethash.(*Ethash).UpdateDAG(0xc208030460)
    /Users/mpwd/.go/src/github.com/ethereum/ethash/ethash.go:172 +0x5b2
github.com/ethereum/ethash.(*Ethash).FullHash(0xc208030460, 0x0, 0xc2080bf120, 0x20, 0x20, 0x0, 0x0, 0x0)
    /Users/mpwd/.go/src/github.com/ethereum/ethash/ethash.go:388 +0x4c
github.com/ethereum/ethash/test/go.TestEthash(0xc20807e090)
    /Users/mpwd/.go/src/github.com/ethereum/ethash/test/go/ethash_test.go:46 +0x5cd
testing.tRunner(0xc20807e090, 0x46db620)
    /usr/local/Cellar/go/1.4.2/libexec/src/testing/testing.go:447 +0xbf
created by testing.RunTests
    /usr/local/Cellar/go/1.4.2/libexec/src/testing/testing.go:555 +0xa8b

goroutine 1 [chan receive]:
testing.RunTests(0x45c3050, 0x46db620, 0x2, 0x2, 0xc20809e401)
    /usr/local/Cellar/go/1.4.2/libexec/src/testing/testing.go:556 +0xad6
testing.(*M).Run(0xc208030ff0, 0x4705fa0)
    /usr/local/Cellar/go/1.4.2/libexec/src/testing/testing.go:485 +0x6c
main.main()
    github.com/ethereum/ethash/test/go/_test/_testmain.go:54 +0x1d5

goroutine 5 [select]:
github.com/ethereum/go-ethereum/logger.dispatchLoop()
    /Users/mpwd/.go/src/github.com/ethereum/go-ethereum/logger/sys.go:41 +0x6d0
created by github.com/ethereum/go-ethereum/logger.init·1
    /Users/mpwd/.go/src/github.com/ethereum/go-ethereum/logger/sys.go:20 +0x25

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/local/Cellar/go/1.4.2/libexec/src/runtime/asm_amd64.s:2232 +0x1
FAIL    github.com/ethereum/ethash/test/go  1.933s

[xcthulhu]

Upstream go-ethereum needs to stabilize before this issue can be tackled.

It should be noted that many of the recent changes to this repo break the ethash.go, so this issue will need to be revisited.