}

// transportRequest is a wrapper around a *Request that adds
// optional extra headers to write and stores any error to return
// from roundTrip.
type transportRequest struct {
	*Request                        // original request, not to be mutated
	extra    Header                 // extra headers to write, or nil
	trace    *httptrace.ClientTrace // optional

	ctx    context.Context // canceled when we are done with the request

//
//	-run=""
//		if non-empty, specifies a regular expression to select
//		directives whose full original source text (excluding
//		any trailing spaces and final newline) matches the
//		expression.
//
//	-skip=""
//		if non-empty, specifies a regular expression to suppress
//		directives whose full original source text (excluding
//		any trailing spaces and final newline) matches the

		t.Fatal(err)
	}
	if err := os.Chdir(dir); err != nil {
		t.Fatal(err)
	}
	t.Logf("Chdir(%#q)", dir)

	t.Cleanup(func() {
		if err := os.Chdir(prev); err != nil {
			// Couldn't chdir back to the original working directory.
			// panic instead of t.Fatal so that we don't run other tests
			// in an unexpected location.
			panic("couldn't restore working directory: " + err.Error())
		}
	})
}

</p>
<pre>
type Point3D struct { x, y, z float64 }
type Line struct { p, q Point3D }
</pre>

<p>
one may write
</p>

<pre>
origin := Point3D{}                            // zero value for Point3D
line := Line{origin, Point3D{y: -4, z: 12.3}}  // zero value for line.q.x
</pre>

<p>
For array and slice literals the following rules apply:
</p>
<ul>

pkg encoding/binary, func Encode([]uint8, ByteOrder, interface{}) (int, error) #60023
pkg go/ast, func Preorder(Node) iter.Seq[Node] #66339
pkg go/types, method (*Alias) Origin() *Alias #67143
pkg go/types, method (*Alias) Rhs() Type #66559
pkg go/types, method (*Alias) SetTypeParams([]*TypeParam) #67143
pkg go/types, method (*Alias) TypeArgs() *TypeList #67143

	// If the Body is nil (or http.NoBody), it's safe to reuse
	// this request and its Body.
	if req.Body == nil || req.Body == NoBody {
		return req, nil
	}

	// If the request body can be reset back to its original
	// state via the optional req.GetBody, do that.
	if req.GetBody != nil {
		body, err := req.GetBody()
		if err != nil {
			return nil, err
		}
		newReq := *req
		newReq.Body = body

		// Below we set z.neg = x.neg, and when z aliases y this will
		// change the y operand's sign. This is fine, because if an
		// operand aliases the receiver it'll be overwritten, but we still
		// want the original x.neg and y.neg values when we evaluate
		// x.neg != y.neg, so we need to save y.neg before setting z.neg.
		yneg := y.neg

		z.neg = x.neg
		if x.neg == yneg {
			// x + y == x + y

		}))
		defer proxy.close()

		req, _ := NewRequest("POST", proxy.ts.URL, io.LimitReader(neverEnding('a'), bodySize))
		res, err := proxy.c.Do(req)
		if err != nil {
			return fmt.Errorf("original request: %v", err)
		}
		res.Body.Close()
		return nil
	})
}

// Test that a hanging Request.Body.Read from another goroutine can't
// cause the Handler goroutine's Request.Body.Close to block.

	}
	oe, ok := uerr.Err.(*net.OpError)
	if !ok {
		t.Fatalf("url.Error.Err =  %T; want *net.OpError", uerr.Err)
	}
	want := &net.OpError{
		Op:  "proxyconnect",
		Net: "tcp",
		Err: errDial, // original error, unwrapped.
	}
	if !reflect.DeepEqual(oe, want) {
		t.Errorf("Got error %#v; want %#v", oe, want)
	}
}

// Issue 36431: calls to RoundTrip should not mutate t.ProxyConnectHeader.
//

				b.Likely = ssa.BranchLikely

				// We have atomic instructions - use it directly.
				s.startBlock(bTrue)
				emit(s, n, args, op1, typ)
				s.endBlock().AddEdgeTo(bEnd)

				// Use original instruction sequence.
				s.startBlock(bFalse)
				emit(s, n, args, op0, typ)
				s.endBlock().AddEdgeTo(bEnd)

				// Merge results.
				s.startBlock(bEnd)
			}
			if typ == types.TNIL {