func (n *Named) expandUnderlying() Type {
	check := n.check
	if check != nil && check.conf._Trace {
		check.trace(n.obj.pos, "-- Named.expandUnderlying %s", n)
		check.indent++
		defer func() {
			check.indent--
			check.trace(n.obj.pos, "=> %s (tparams = %s, under = %s)", n, n.tparams.list(), n.underlying)
		}()
	}

	assert(n.inst.orig.underlying != nil)

func (check *Checker) funcBody(decl *declInfo, name string, sig *Signature, body *ast.BlockStmt, iota constant.Value) {
	if check.conf.IgnoreFuncBodies {
		panic("function body not ignored")
	}

	if check.conf._Trace {
		check.trace(body.Pos(), "-- %s: %s", name, sig)
	}

	// save/restore current environment and set up function environment
	// (and use 0 indentation at function start)
	defer func(env environment, indent int) {

	assert(check != nil)
	assert(len(targs) == typ.TypeParams().Len())

	if check.conf._Trace {
		check.trace(pos, "-- instantiating signature %s with %s", typ, targs)
		check.indent++
		defer func() {
			check.indent--
			check.trace(pos, "=> %s (under = %s)", res, res.Underlying())
		}()
	}

	inst := check.instance(pos, typ, targs, nil, check.context()).(*Signature)

		p.print(n.Type, blank)
		if n.Body != nil {
			if p.form == ShortForm {
				p.print(_Lbrace)
				if len(n.Body.List) > 0 {
					p.print(_Name, "…")
				}
				p.print(_Rbrace)
			} else {
				p.print(n.Body)
			}
		}

	case *CompositeLit:
		if n.Type != nil {
			p.print(n.Type)
		}
		p.print(_Lbrace)
		if p.form == ShortForm {
			if len(n.ElemList) > 0 {
				p.print(_Name, "…")
			}

		buf.link = trace.empty
		trace.empty = buf
		trace.reading = nil
	}
	// Write trace header.
	if !trace.headerWritten {
		trace.headerWritten = true
		unlock(&trace.lock)
		return []byte("go 1.23 trace\x00\x00\x00"), false
	}

	// Read the next buffer.

	if trace.readerGen.Load() == 0 {
		trace.readerGen.Store(1)
	}
	var gen uintptr
	for {
		assertLockHeld(&trace.lock)

					clause := n.(*ast.CommClause)
					f.addCounters(clause.Colon+1, clause.Colon+1, clause.End(), clause.Body, false)
				}
				return f
			}
		}
		f.addCounters(n.Lbrace, n.Lbrace+1, n.Rbrace+1, n.List, true) // +1 to step past closing brace.
	case *ast.IfStmt:
		if n.Init != nil {
			ast.Walk(f, n.Init)
		}
		ast.Walk(f, n.Cond)
		ast.Walk(f, n.Body)
		if n.Else == nil {
			return nil
		}

		return s.Label.End()
	}
	return token.Pos(int(s.TokPos) + len(s.Tok.String()))
}
func (s *BlockStmt) End() token.Pos {
	if s.Rbrace.IsValid() {
		return s.Rbrace + 1
	}
	if n := len(s.List); n > 0 {
		return s.List[n-1].End()
	}
	return s.Lbrace + 1
}
func (s *IfStmt) End() token.Pos {
	if s.Else != nil {
		return s.Else.End()
	}
	return s.Body.End()
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build race

package runtime

import (
	"internal/abi"
	"unsafe"
)

// Public race detection API, present iff build with -race.

func RaceRead(addr unsafe.Pointer)
func RaceWrite(addr unsafe.Pointer)
func RaceReadRange(addr unsafe.Pointer, len int)

	SYS_GETUID                   = 24  // { uid_t getuid(void); }
	SYS_GETEUID                  = 25  // { uid_t geteuid(void); }
	SYS_PTRACE                   = 26  // { int ptrace(int req, pid_t pid, \
	SYS_RECVMSG                  = 27  // { int recvmsg(int s, struct msghdr *msg, \
	SYS_SENDMSG                  = 28  // { int sendmsg(int s, struct msghdr *msg, \

			t.Run("subsub1", func(t *testing.T) {
				t.Parallel()
				doRace()
				c1 <- true
			})
			t.Run("subsub2", func(t *testing.T) {
				t.Parallel()
				doRace()
				<-c1
			})
		})
		doRace()
		return
	}

	out := runTest(t, "TestRaceSubReports")

	// There should be three race reports: one for each subtest, and one for the
	// race after the subtests complete. Note that because the subtests run in