ssa: cvtClosure remove closureCtx param

ssa/expr.go

@@ -1005,7 +1005,8 @@ func (b Builder) Call(fn Expr, args ...Expr) (ret Expr) {
 	case vkClosure:
 		data = b.Field(fn, 1)
 		fn = b.Field(fn, 0)
-		raw = fn.raw.Type
+		ctx := types.NewParam(token.NoPos, nil, closureCtx, types.Typ[types.UnsafePointer])
+		raw = FuncAddCtx(ctx, fn.raw.Type.(*types.Signature))
 		fallthrough
 	case vkFuncPtr:
 		sig = raw.Underlying().(*types.Signature)

ssa/type_cvt.go

@@ -174,8 +174,7 @@ func Instantiate(orig types.Type, t *types.Named) (types.Type, bool) {
 }
 
 func (p goTypes) cvtClosure(sig *types.Signature) *types.Struct {
-	ctx := types.NewParam(token.NoPos, nil, closureCtx, types.Typ[types.UnsafePointer])
-	raw := p.cvtFunc(sig, ctx)
+	raw := p.cvtFunc(sig, nil)
 	flds := []*types.Var{
 		types.NewField(token.NoPos, nil, "f", raw, false),
 		types.NewField(token.NoPos, nil, "data", types.Typ[types.UnsafePointer], false),