Similar to tip https://golang.org/cl/197559.
Fixes #35408
Change-Id: Ie8e28b93fb3adf23c3a0a39f6917ff76abf44fdf
Reviewed-on: https://go-review.googlesource.com/c/go/+/205721
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
rtype
key *rtype // map key type
elem *rtype // map element (value) type
+ bucket *rtype // internal bucket structure
keysize uint8 // size of key slot
valuesize uint8 // size of value slot
bucketsize uint16 // size of bucket