diff options
Diffstat (limited to 'src/runtime/map.go')
| -rw-r--r-- | src/runtime/map.go | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/runtime/map.go b/src/runtime/map.go index e91b25eaec..2e513e2d52 100644 --- a/src/runtime/map.go +++ b/src/runtime/map.go @@ -842,9 +842,11 @@ func mapiterinit(t *maptype, h *hmap, it *hiter) { } // decide where to start - r := uintptr(fastrand()) + var r uintptr if h.B > 31-bucketCntBits { - r += uintptr(fastrand()) << 31 + r = uintptr(fastrand64()) + } else { + r = uintptr(fastrand()) } it.startBucket = r & bucketMask(h.B) it.offset = uint8(r >> h.B & (bucketCnt - 1)) |