by daniel@cloudflare.com:

running all.bash on a brand new checkout returns this error:

# Checking API compatibility.
Error running API checker: exit status 1
2014/02/03 08:56:45 error typechecking package crypto/x509:
/home/dmorsing/src/gotip/src/pkg/crypto/x509/pem_decrypt.go:49:14: cannot use
des.NewCipher (value of type func(key []byte) (cipher.Block, error)) as func(key []byte)
(cipher.Block, error) value in struct literal (windows-amd64)

Since that didn't make any sense, I tried deleting all installed versions of go/types.
Somehow cmd/api still manages to run and give that error, even though it's installed on
every compile.

I tried installing the cmd/api tool manually to see if I had some package somewhere that
the go tool was picking up. It gave me the following compilation errors.

# cmd/api
./goapi.go:627: invalid case ast.SEND in switch on typ.Dir() (mismatched types
ast.ChanDir and types.ChanDir)
./goapi.go:629: invalid case ast.RECV in switch on typ.Dir() (mismatched types
ast.ChanDir and types.ChanDir)
./goapi.go:652: sig.IsVariadic undefined (type *types.Signature has no field or method
IsVariadic)
./goapi.go:727: m.Obj().IsExported undefined (type types.Object has no field or method
IsExported)
./goapi.go:742: m.Obj().IsExported undefined (type types.Object has no field or method
IsExported)
./goapi.go:755: f.IsExported undefined (type *types.Var has no field or method
IsExported)
./goapi.go:775: m.IsExported undefined (type *types.Func has no field or method
IsExported)
./goapi.go:826: obj.IsExported undefined (type *types.TypeName has no field or method
IsExported)

I'm not sure how the builders are not falling over right now.