bug165.go:13:6: error: invalid recursive type 'S'
This is a different line from the 6g error message, which is
"invalid map key type". I accomodated both compilers by
merging the line.
bug188.go:13:2: error: unexpected reference to package
I made the error message less specific, which I think is fine
here.
R=rsc
DELTA=2 (0 added, 0 deleted, 2 changed)
OCL=33398
CL=33426