diff options
Diffstat (limited to 'src/cmd/compile/internal/reflectdata/reflect.go')
| -rw-r--r-- | src/cmd/compile/internal/reflectdata/reflect.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/reflectdata/reflect.go b/src/cmd/compile/internal/reflectdata/reflect.go index f65841b33c..3576a23db9 100644 --- a/src/cmd/compile/internal/reflectdata/reflect.go +++ b/src/cmd/compile/internal/reflectdata/reflect.go @@ -1116,6 +1116,15 @@ func writeType(t *types.Type) *obj.LSym { } ot = objw.Uint32(lsym, ot, flags) ot = dextratype(lsym, ot, t, 0) + if u := t.Underlying(); u != t { + // If t is a named map type, also keep the underlying map + // type live in the binary. This is important to make sure that + // a named map and that same map cast to its underlying type via + // reflection, use the same hash function. See issue 37716. + r := obj.Addrel(lsym) + r.Sym = writeType(u) + r.Type = objabi.R_KEEP + } case types.TPTR: if t.Elem().Kind() == types.TANY { |