libgo: update to go1.8rc3

Programming / Compilers / GCC - ian [138bc75d-0d04-0410-961f-82ee72b054a4] - 27 January 2017 10:01 EST

Reviewed-on: https://go-review.googlesource.com/35844

###

diff --git a/libgo/MERGE b/libgo/MERGE
index 92541df..fa155a2 100644
--- a/libgo/MERGE
+++ b/libgo/MERGE
@@ -1,4 +1,4 @@
-59f181b6fda68ece22882945853ca2df9dbf1c88
+2a5f65a98ca483aad2dd74dc2636a7baecc59cf2

The first line of this file holds the git revision number of the
last merge done from the master library sources.
diff --git a/libgo/VERSION b/libgo/VERSION
index 212211f..8b33af3 100644
--- a/libgo/VERSION
+++ b/libgo/VERSION
@@ -1 +1 @@
-go1.8rc2
+go1.8rc3
diff --git a/libgo/go/cmd/go/go_test.go b/libgo/go/cmd/go/go_test.go
index 5727eb0..f26c366 100644
--- a/libgo/go/cmd/go/go_test.go
+++ b/libgo/go/cmd/go/go_test.go
@@ -3787,3 +3787,26 @@ GLOBL ·constants<>(SB),8,$8
tg.setenv("GOPATH", tg.path("go"))
tg.run("build", "p")
}
+
+// Issue 18778.
+func TestDotDotDotOutsideGOPATH(t *testing.T) {
+ tg := testgo(t)
+ defer tg.cleanup()
+
+ tg.tempFile("pkgs/a.go", `package x`)
+ tg.tempFile("pkgs/a_test.go", `package x_test
+import "testing"
+func TestX(t *testing.T) {}`)
+
+ tg.tempFile("pkgs/a/a.go", `package a`)
+ tg.tempFile("pkgs/a/a_test.go", `package a_test
+import "testing"
+func TestA(t *testing.T) {}`)
+
+ tg.cd(tg.path("pkgs"))
+ tg.run("build", "./...")
+ tg.run("test", "./...")
+ tg.run("list", "./...")
+ tg.grepStdout("pkgs$", "expected package not listed")
+ tg.grepStdout("pkgs/a", "expected package not listed")
+}
diff --git a/libgo/go/cmd/go/pkg.go b/libgo/go/cmd/go/pkg.go
index af8c1d9..61c1b99 100644
--- a/libgo/go/cmd/go/pkg.go
+++ b/libgo/go/cmd/go/pkg.go
@@ -433,7 +433,7 @@ func setErrorPos(p *Package, importPos []token.Position) *Package {
func cleanImport(path string) string {
orig := path
path = pathpkg.Clean(path)
- if strings.HasPrefix(orig, "./") && path != ".." && path != "." && !strings.HasPrefix(path, "../") {
+ if strings.HasPrefix(orig, "./") && path != ".." && !strings.HasPrefix(path, "../") {
path = "./" + path
}
return path
diff --git a/libgo/go/database/sql/sql.go b/libgo/go/database/sql/sql.go
index 0fa7c34..feb9122 100644
--- a/libgo/go/database/sql/sql.go
+++ b/libgo/go/database/sql/sql.go
@@ -1357,16 +1357,7 @@ func (db *DB) begin(ctx context.Context, opts *TxOptions, strategy connReuseStra
cancel: cancel,
ctx: ctx,
}
- go func(tx *Tx) {
- select {
- case <-tx.ctx.Done():
- if !tx.isDone() {
- // Discard and close the connection used to ensure the transaction
- // is closed and the resources are released.
- tx.rollback(true)
- }
- }
- }(tx)
+ go tx.awaitDone()
return tx, nil
}

@@ -1388,6 +1379,11 @@ func (db *DB) Driver() driver.Driver {
type Tx struct {
db *DB

+ // closemu prevents the transaction from closing while there
+ // is an active query. It is held for read during queries
+ // and exclusively during close.
+ closemu sync.RWMutex
+
// dc is owned exclusively until Commit or Rollback, at which point
// it's returned with putConn.
dc *driverConn
@@ -1413,6 +1409,20 @@ type Tx struct {
ctx context.Context
}

+// awaitDone blocks until the context in Tx is canceled and rolls back
+// the transaction if it's not already done.
+func (tx *Tx) awaitDone() {
+ // Wait for either the transaction to be committed or rolled
+ // back, or for the associated context to be closed.
+ <-tx.ctx.Done()
+
+ // Discard and close the connection used to ensure the
+ // transaction is closed and the resources are released. This
+ // rollback does nothing if the transaction has already been
+ // committed or rolled back.
+ tx.rollback(true)
+}
+
func (tx *Tx) isDone() bool {
return atomic.LoadInt32(&tx.done) != 0
}
@@ -1424,16 +1434,31 @@ var ErrTxDone = errors.New("sql: Transaction has already been committed or rolle
// close returns the connection to the pool and
// must only be called by Tx.rollback or Tx.Commit.
func (tx *Tx) close(err error) {
+ tx.closemu.Lock()
+ defer tx.closemu.Unlock()
+
tx.db.putConn(tx.dc, err)
tx.cancel()
tx.dc = nil
tx.txi = nil
}

+// hookTxGrabConn specifies an optional hook to be called on
+// a successful call to (*Tx).grabConn. For tests.
+var hookTxGrabConn func()
+
func (tx *Tx) grabConn(ctx context.Context) (*driverConn, error) {
+ select {
+ default:
+ case <-ctx.Done():
+ return nil, ctx.Err()
+ }
if tx.isDone() {
return nil, ErrTxDone
}
+ if hookTxGrabConn != nil { // test hook
+ hookTxGrabConn()
+ }
return tx.dc, nil
}

@@ -1503,6 +1528,9 @@ func (tx *Tx) Rollback() error {
// for the execution of the returned statement. The returned statement
// will run in the transaction context.
func (tx *Tx) PrepareContext(ctx context.Context, query string) (*Stmt, error) {
+ tx.closemu.RLock()
+ defer tx.closemu.RUnlock()
+
// TODO(bradfitz): We could be more efficient here and either
// provide a method to take an existing Stmt (created on
// perhaps a different Conn), and re-create it on this Conn if
@@ -1567,6 +1595,9 @@ func (tx *Tx) Prepare(query string) (*Stmt, error) {
// The returned statement operates within the transaction and will be closed
// when the transaction has been committed or rolled back.
func (tx *Tx) StmtContext(ctx context.Context, stmt *Stmt) *Stmt {
+ tx.closemu.RLock()
+ defer tx.closemu.RUnlock()
+
// TODO(bradfitz): optimize this. Currently this re-prepares
// each time. This is fine for now to illustrate the API but
// we should really cache already-prepared statements
@@ -1618,6 +1649,9 @@ func (tx *Tx) Stmt(stmt *Stmt) *Stmt {
// ExecContext executes a query that doesn't return rows.
// For example: an INSERT and UPDATE.
func (tx *Tx) ExecContext(ctx context.Context, query string, args ...interface{}) (Result, error) {
+ tx.closemu.RLock()
+ defer tx.closemu.RUnlock()
+
dc, err := tx.grabConn(ctx)
if err != nil {
return nil, err
@@ -1661,6 +1695,9 @@ func (tx *Tx) Exec(query string, args ...interface{}) (Result, error) {

// QueryContext executes a query that returns rows, typically a SELECT.
func (tx *Tx) QueryContext(ctx context.Context, query string, args ...interface{}) (*Rows, error) {
+ tx.closemu.RLock()
+ defer tx.closemu.RUnlock()
+
dc, err := tx.grabConn(ctx)
if err != nil {
return nil, err
@@ -2038,25 +2075,21 @@ type Rows struct {
// closed value is 1 when the Rows is closed.
// Use atomic operations on value when checking value.
closed int32
- ctxClose chan struct{} // closed when Rows is closed, may be null.
+ cancel func() // called when Rows is closed, may be nil.
lastcols []driver.Value
lasterr error // non-nil only if closed is true
closeStmt *driverStmt // if non-nil, statement to Close on close
}

func (rs *Rows) initContextClose(ctx context.Context) {
- if ctx.Done() == context.Background().Done() {
- return
- }
+ ctx, rs.cancel = context.WithCancel(ctx)
+ go rs.awaitDone(ctx)
+}

- rs.ctxClose = make(chan struct{})
- go func() {
- select {
- case <-ctx.Done():
- rs.Close()
- case <-rs.ctxClose:
- }
- }()
+// awaitDone blocks until the rows are closed or the context canceled.
+func (rs *Rows) awaitDone(ctx context.Context) {
+ <-ctx.Done()
+ rs.Close()
}

// Next prepares the next result row for reading with the Scan method. It
@@ -2314,7 +2347,9 @@ func (rs *Rows) Scan(dest ...interface{}) error {
return nil
}

-var rowsCloseHook func(*Rows, *error)
+// rowsCloseHook returns a function so tests may install the
+// hook throug a test only mutex.
+var rowsCloseHook = func() func(*Rows, *error) { return nil }

func (rs *Rows) isClosed() bool {
return atomic.LoadInt32(&rs.closed) != 0
@@ -2328,13 +2363,15 @@ func (rs *Rows) Close() error {
if !atomic.CompareAndSwapInt32(&rs.closed, 0, 1) {
return nil
}
- if rs.ctxClose != nil {
- close(rs.ctxClose)
- }
+
err := rs.rowsi.Close()
- if fn := rowsCloseHook; fn != nil {
+ if fn := rowsCloseHook(); fn != nil {
fn(rs, &err)
}
+ if rs.cancel != nil {
+ rs.cancel()
+ }
+
if rs.closeStmt != nil {
rs.closeStmt.Close()
}
diff --git a/libgo/go/database/sql/sql_test.go b/libgo/go/database/sql/sql_test.go
index 63e1292..898df3b 100644
--- a/libgo/go/database/sql/sql_test.go
+++ b/libgo/go/database/sql/sql_test.go
@@ -14,6 +14,7 @@ import (
"runtime"
"strings"
"sync"
+ "sync/atomic"
"testing"
"time"
)
@@ -326,9 +327,7 @@ func TestQueryContext(t *testing.T) {

// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
- if n := db.numFreeConns(); n != 1 {
- t.Fatalf("free conns after query hitting EOF = %d; want 1", n)
- }
+ waitForFree(t, db, 5*time.Second, 1)
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
@@ -345,6 +344,18 @@ func waitCondition(waitFor, checkEvery time.Duration, fn func() bool) bool {
return false
}

+// waitForFree checks db.numFreeConns until either it equals want or
+// the maxWait time elapses.
+func waitForFree(t *testing.T, db *DB, maxWait time.Duration, want int) {
+ var numFree int
+ if !waitCondition(maxWait, 5*time.Millisecond, func() bool {
+ numFree = db.numFreeConns()
+ return numFree == want
+ }) {
+ t.Fatalf("free conns after hitting EOF = %d; want %d", numFree, want)
+ }
+}
+
func TestQueryContextWait(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
@@ -361,9 +372,7 @@ func TestQueryContextWait(t *testing.T) {
}

// Verify closed rows connection after error condition.
- if n := db.numFreeConns(); n != 1 {
- t.Fatalf("free conns after query hitting EOF = %d; want 1", n)
- }
+ waitForFree(t, db, 5*time.Second, 1)
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
@@ -388,13 +397,7 @@ func TestTxContextWait(t *testing.T) {
t.Fatalf("expected QueryContext to error with context deadline exceeded but returned %v", err)
}

- var numFree int
- if !waitCondition(5*time.Second, 5*time.Millisecond, func() bool {
- numFree = db.numFreeConns()
- return numFree == 0
- }) {
- t.Fatalf("free conns after hitting EOF = %d; want 0", numFree)
- }
+ waitForFree(t, db, 5*time.Second, 0)

// Ensure the dropped connection allows more connections to be made.
// Checked on DB Close.
@@ -471,9 +474,7 @@ func TestMultiResultSetQuery(t *testing.T) {

// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
- if n := db.numFreeConns(); n != 1 {
- t.Fatalf("free conns after query hitting EOF = %d; want 1", n)
- }
+ waitForFree(t, db, 5*time.Second, 1)
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
@@ -1135,6 +1136,24 @@ func TestQueryRowClosingStmt(t *testing.T) {
}
}

+var atomicRowsCloseHook atomic.Value // of func(*Rows, *error)
+
+func init() {
+ rowsCloseHook = func() func(*Rows, *error) {
+ fn, _ := atomicRowsCloseHook.Load().(func(*Rows, *error))
+ return fn
+ }
+}
+
+func setRowsCloseHook(fn func(*Rows, *error)) {
+ if fn == nil {
+ // Can't change an atomic.Value back to nil, so set it to this
+ // no-op func instead.
+ fn = func(*Rows, *error) {}
+ }
+ atomicRowsCloseHook.Store(fn)
+}
+
// Test issue 6651
func TestIssue6651(t *testing.T) {
db := newTestDB(t, "people")
@@ -1147,6 +1166,7 @@ func TestIssue6651(t *testing.T) {
return fmt.Errorf(want)
}
defer func() { rowsCursorNextHook = nil }()
+
err := db.QueryRow("SELECT|people|name|").Scan(&v)
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err, want)
@@ -1154,10 +1174,10 @@ func TestIssue6651(t *testing.T) {
rowsCursorNextHook = nil

want = "error in rows.Close"
- rowsCloseHook = func(rows *Rows, err *error) {
+ setRowsCloseHook(func(rows *Rows, err *error) {
*err = fmt.Errorf(want)
- }
- defer func() { rowsCloseHook = nil }()
+ })
+ defer setRowsCloseHook(nil)
err = db.QueryRow("SELECT|people|name|").Scan(&v)
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err, want)
@@ -1830,7 +1850,9 @@ func TestStmtCloseDeps(t *testing.T) {
db.dumpDeps(t)
}

- if len(stmt.css) > nquery {
+ if !waitCondition(5*time.Second, 5*time.Millisecond, func() bool {
+ return len(stmt.css) <= nquery
+ }) {
t.Errorf("len(stmt.css) = %d; want <= %d", len(stmt.css), nquery)
}

@@ -2576,10 +2598,10 @@ func TestIssue6081(t *testing.T) {
if err != nil {
t.Fatal(err)
}
- rowsCloseHook = func(rows *Rows, err *error) {
+ setRowsCloseHook(func(rows *Rows, err *error) {
*err = driver.ErrBadConn
- }
- defer func() { rowsCloseHook = nil }()
+ })
+ defer setRowsCloseHook(nil)
for i := 0; i < 10; i++ {
rows, err := stmt.Query()
if err != nil {
@@ -2642,7 +2664,10 @@ func TestIssue18429(t *testing.T) {
if err != nil {
return
}
- rows, err := tx.QueryContext(ctx, "WAIT|"+qwait+"|SELECT|people|name|")
+ // This is expected to give a cancel error many, but not all the time.
+ // Test failure will happen with a panic or other race condition being
+ // reported.
+ rows, _ := tx.QueryContext(ctx, "WAIT|"+qwait+"|SELECT|people|name|")
if rows != nil {
rows.Close()
}
@@ -2655,6 +2680,56 @@ func TestIssue18429(t *testing.T) {
time.Sleep(milliWait * 3 * time.Millisecond)
}

+// TestIssue18719 closes the context right before use. The sql.driverConn
+// will nil out the ci on close in a lock, but if another process uses it right after
+// it will panic with on the nil ref.
+//
+// See https://golang.org/cl/35550 .
+func TestIssue18719(t *testing.T) {
+ db := newTestDB(t, "people")
+ defer closeDB(t, db)
+
+ ctx, cancel := context.WithCancel(context.Background())
+ defer cancel()
+
+ tx, err := db.BeginTx(ctx, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ hookTxGrabConn = func() {
+ cancel()
+
+ // Wait for the context to cancel and tx to rollback.
+ for tx.isDone() == false {
+ time.Sleep(time.Millisecond * 3)
+ }
+ }
+ defer func() { hookTxGrabConn = nil }()
+
+ // This call will grab the connection and cancel the context
+ // after it has done so. Code after must deal with the canceled state.
+ rows, err := tx.QueryContext(ctx, "SELECT|people|name|")
+ if err != nil {
+ rows.Close()
+ t.Fatalf("expected error %v but got %v", nil, err)
+ }
+
+ // Rows may be ignored because it will be closed when the context is canceled.
+
+ // Do not explicitly rollback. The rollback will happen from the
+ // canceled context.
+
+ // Wait for connections to return to pool.
+ var numOpen int
+ if !waitCondition(5*time.Second, 5*time.Millisecond, func() bool {
+ numOpen = db.numOpenConns()
+ return numOpen == 0
+ }) {
+ t.Fatalf("open conns after hitting EOF = %d; want 0", numOpen)
+ }
+}
+
func TestConcurrency(t *testing.T) {
doConcurrentTest(t, new(concurrentDBQueryTest))
doConcurrentTest(t, new(concurrentDBExecTest))
diff --git a/libgo/go/go/printer/nodes.go b/libgo/go/go/printer/nodes.go
index 11f26d4..ea43286 100644
--- a/libgo/go/go/printer/nodes.go
+++ b/libgo/go/go/printer/nodes.go
@@ -733,7 +733,7 @@ func (p *printer) expr1(expr ast.Expr, prec1, depth int) {

case *ast.FuncLit:
p.expr(x.Type)
- p.adjBlock(p.distanceFrom(x.Type.Pos()), blank, x.Body)
+ p.funcBody(p.distanceFrom(x.Type.Pos()), blank, x.Body)

case *ast.ParenExpr:
if _, hasParens := x.X.(*ast.ParenExpr); hasParens {
@@ -825,6 +825,7 @@ func (p *printer) expr1(expr ast.Expr, prec1, depth int) {
if x.Type != nil {
p.expr1(x.Type, token.HighestPrec, depth)
}
+ p.level++
p.print(x.Lbrace, token.LBRACE)
p.exprList(x.Lbrace, x.Elts, 1, commaTerm, x.Rbrace)
// do not insert extra line break following a /*-style comment
@@ -837,6 +838,7 @@ func (p *printer) expr1(expr ast.Expr, prec1, depth int) {
mode |= noExtraBlank
}
p.print(mode, x.Rbrace, token.RBRACE, mode)
+ p.level--

case *ast.Ellipsis:
p.print(token.ELLIPSIS)
@@ -1557,18 +1559,23 @@ func (p *printer) bodySize(b *ast.BlockStmt, maxSize int) int {
return bodySize
}

-// adjBlock prints an "adjacent" block (e.g., a for-loop or function body) following
-// a header (e.g., a for-loop control clause or function signature) of given headerSize.
+// funcBody prints a function body following a function header of given headerSize.
// If the header's and block's size are "small enough" and the block is "simple enough",
// the block is printed on the current line, without line breaks, spaced from the header
// by sep. Otherwise the block's opening "{" is printed on the current line, followed by
// lines for the block's statements and its closing "}".
//
-func (p *printer) adjBlock(headerSize int, sep whiteSpace, b *ast.BlockStmt) {
+func (p *printer) funcBody(headerSize int, sep whiteSpace, b *ast.BlockStmt) {
if b == nil {
return
}

+ // save/restore composite literal nesting level
+ defer func(level int) {
+ p.level = level
+ }(p.level)
+ p.level = 0
+
const maxSize = 100
if headerSize+p.bodySize(b, maxSize) <= maxSize {
p.print(sep, b.Lbrace, token.LBRACE)
@@ -1613,7 +1620,7 @@ func (p *printer) funcDecl(d *ast.FuncDecl) {
}
p.expr(d.Name)
p.signature(d.Type.Params, d.Type.Results)
- p.adjBlock(p.distanceFrom(d.Pos()), vtab, d.Body)
+ p.funcBody(p.distanceFrom(d.Pos()), vtab, d.Body)
}

func (p *printer) decl(decl ast.Decl) {
diff --git a/libgo/go/go/printer/printer.go b/libgo/go/go/printer/printer.go
index eabf23e..be61dad5 100644
--- a/libgo/go/go/printer/printer.go
+++ b/libgo/go/go/printer/printer.go
@@ -58,6 +58,7 @@ type printer struct {
// Current state
output []byte // raw printer result
indent int // current indentation
+ level int // level == 0: outside composite literal; level > 0: inside composite literal
mode pmode // current printer mode
impliedSemi bool // if set, a linebreak implies a semicolon
lastTok token.Token // last token printed (token.ILLEGAL if it's whitespace)
@@ -744,15 +745,19 @@ func (p *printer) intersperseComments(next token.Position, tok token.Token) (wro
// follows on the same line but is not a comma, and not a "closing"
// token immediately following its corresponding "opening" token,
// add an extra separator unless explicitly disabled. Use a blank
- // as separator unless we have pending linebreaks and they are not
- // disabled, in which case we want a linebreak (issue 15137).
+ // as separator unless we have pending linebreaks, they are not
+ // disabled, and we are outside a composite literal, in which case
+ // we want a linebreak (issue 15137).
+ // TODO(gri) This has become overly complicated. We should be able
+ // to track whether we're inside an expression or statement and
+ // use that information to decide more directly.
needsLinebreak := false
if p.mode&noExtraBlank == 0 &&
last.Text[1] == '*' && p.lineFor(last.Pos()) == next.Line &&
tok != token.COMMA &&
(tok != token.RPAREN || p.prevOpen == token.LPAREN) &&
(tok != token.RBRACK || p.prevOpen == token.LBRACK) {
- if p.containsLinebreak() && p.mode&noExtraLinebreak == 0 {
+ if p.containsLinebreak() && p.mode&noExtraLinebreak == 0 && p.level == 0 {
needsLinebreak = true
} else {
p.writeByte(' ', 1)
diff --git a/libgo/go/go/printer/testdata/comments2.golden b/libgo/go/go/printer/testdata/comments2.golden
index 7676a26..8b3a94d 100644
--- a/libgo/go/go/printer/testdata/comments2.golden
+++ b/libgo/go/go/printer/testdata/comments2.golden
@@ -103,3 +103,62 @@ label:
mask := uint64(1)< used := atomic.LoadUint64(&h.used) // Current allocations
}
+
+// Test cases for issue 18782
+var _ = [][]int{
+ /* a, b, c, d, e */
+ /* a */ {0, 0, 0, 0, 0},
+ /* b */ {0, 5, 4, 4, 4},
+ /* c */ {0, 4, 5, 4, 4},
+ /* d */ {0, 4, 4, 5, 4},
+ /* e */ {0, 4, 4, 4, 5},
+}
+
+var _ = T{ /* a */ 0}
+
+var _ = T{ /* a */ /* b */ 0}
+
+var _ = T{ /* a */ /* b */
+ /* c */ 0,
+}
+
+var _ = T{ /* a */ /* b */
+ /* c */
+ /* d */ 0,
+}
+
+var _ = T{
+ /* a */
+ /* b */ 0,
+}
+
+var _ = T{ /* a */ {}}
+
+var _ = T{ /* a */ /* b */ {}}
+
+var _ = T{ /* a */ /* b */
+ /* c */ {},
+}
+
+var _ = T{ /* a */ /* b */
+ /* c */
+ /* d */ {},
+}
+
+var _ = T{
+ /* a */
+ /* b */ {},
+}
+
+var _ = []T{
+ func() {
+ var _ = [][]int{
+ /* a, b, c, d, e */
+ /* a */ {0, 0, 0, 0, 0},
+ /* b */ {0, 5, 4, 4, 4},
+ /* c */ {0, 4, 5, 4, 4},
+ /* d */ {0, 4, 4, 5, 4},
+ /* e */ {0, 4, 4, 4, 5},
+ }
+ },
+}
diff --git a/libgo/go/go/printer/testdata/comments2.input b/libgo/go/go/printer/testdata/comments2.input
index 4a055c8..8d38c41 100644
--- a/libgo/go/go/printer/testdata/comments2.input
+++ b/libgo/go/go/printer/testdata/comments2.input
@@ -103,3 +103,66 @@ label:
mask := uint64(1)< used := atomic.LoadUint64(&h.used) // Current allocations
}
+
+// Test cases for issue 18782
+var _ = [][]int{
+ /* a, b, c, d, e */
+ /* a */ {0, 0, 0, 0, 0},
+ /* b */ {0, 5, 4, 4, 4},
+ /* c */ {0, 4, 5, 4, 4},
+ /* d */ {0, 4, 4, 5, 4},
+ /* e */ {0, 4, 4, 4, 5},
+}
+
+var _ = T{ /* a */ 0,
+}
+
+var _ = T{ /* a */ /* b */ 0,
+}
+
+var _ = T{ /* a */ /* b */
+ /* c */ 0,
+}
+
+var _ = T{ /* a */ /* b */
+ /* c */
+ /* d */ 0,
+}
+
+var _ = T{
+ /* a */
+ /* b */ 0,
+}
+
+var _ = T{ /* a */ {},
+}
+
+var _ = T{ /* a */ /* b */ {},
+}
+
+var _ = T{ /* a */ /* b */
+ /* c */ {},
+}
+
+var _ = T{ /* a */ /* b */
+ /* c */
+ /* d */ {},
+}
+
+var _ = T{
+ /* a */
+ /* b */ {},
+}
+
+var _ = []T{
+ func() {
+ var _ = [][]int{
+ /* a, b, c, d, e */
+ /* a */ {0, 0, 0, 0, 0},
+ /* b */ {0, 5, 4, 4, 4},
+ /* c */ {0, 4, 5, 4, 4},
+ /* d */ {0, 4, 4, 5, 4},
+ /* e */ {0, 4, 4, 4, 5},
+ }
+ },
+}
diff --git a/libgo/go/net/http/client.go b/libgo/go/net/http/client.go
index d368bae..0005538 100644
--- a/libgo/go/net/http/client.go
+++ b/libgo/go/net/http/client.go
@@ -413,11 +413,12 @@ func (c *Client) checkRedirect(req *Request, via []*Request) error {

// redirectBehavior describes what should happen when the
// client encounters a 3xx status code from the server
-func redirectBehavior(reqMethod string, resp *Response, ireq *Request) (redirectMethod string, shouldRedirect bool) {
+func redirectBehavior(reqMethod string, resp *Response, ireq *Request) (redirectMethod string, shouldRedirect, includeBody bool) {
switch resp.StatusCode {
case 301, 302, 303:
redirectMethod = reqMethod
shouldRedirect = true
+ includeBody = false

// RFC 2616 allowed automatic redirection only with GET and
// HEAD requests. RFC 7231 lifts this restriction, but we still
@@ -429,6 +430,7 @@ func redirectBehavior(reqMethod string, resp *Response, ireq *Request) (redirect
case 307, 308:
redirectMethod = reqMethod
shouldRedirect = true
+ includeBody = true

// Treat 307 and 308 specially, since they're new in
// Go 1.8, and they also require re-sending the request body.
@@ -449,7 +451,7 @@ func redirectBehavior(reqMethod string, resp *Response, ireq *Request) (redirect
shouldRedirect = false
}
}
- return redirectMethod, shouldRedirect
+ return redirectMethod, shouldRedirect, includeBody
}

// Do sends an HTTP request and returns an HTTP response, following
@@ -492,11 +494,14 @@ func (c *Client) Do(req *Request) (*Response, error) {
}

var (
- deadline = c.deadline()
- reqs []*Request
- resp *Response
- copyHeaders = c.makeHeadersCopier(req)
+ deadline = c.deadline()
+ reqs []*Request
+ resp *Response
+ copyHeaders = c.makeHeadersCopier(req)
+
+ // Redirect behavior:
redirectMethod string
+ includeBody bool
)
uerr := func(err error) error {
req.closeBody()
@@ -534,7 +539,7 @@ func (c *Client) Do(req *Request) (*Response, error) {
Cancel: ireq.Cancel,
ctx: ireq.ctx,
}
- if ireq.GetBody != nil {
+ if includeBody && ireq.GetBody != nil {
req.Body, err = ireq.GetBody()
if err != nil {
return nil, uerr(err)
@@ -598,7 +603,7 @@ func (c *Client) Do(req *Request) (*Response, error) {
}

var shouldRedirect bool
- redirectMethod, shouldRedirect = redirectBehavior(req.Method, resp, reqs[0])
+ redirectMethod, shouldRedirect, includeBody = redirectBehavior(req.Method, resp, reqs[0])
if !shouldRedirect {
return resp, nil
}
diff --git a/libgo/go/net/http/client_test.go b/libgo/go/net/http/client_test.go
index eaf2cdc..4f674dd 100644
--- a/libgo/go/net/http/client_test.go
+++ b/libgo/go/net/http/client_test.go
@@ -360,25 +360,25 @@ func TestPostRedirects(t *testing.T) {
wantSegments := []string{
`POST / "first"`,
`POST /?code=301&next=302 "c301"`,
- `GET /?code=302 "c301"`,
- `GET / "c301"`,
+ `GET /?code=302 ""`,
+ `GET / ""`,
`POST /?code=302&next=302 "c302"`,
- `GET /?code=302 "c302"`,
- `GET / "c302"`,
+ `GET /?code=302 ""`,
+ `GET / ""`,
`POST /?code=303&next=301 "c303wc301"`,
- `GET /?code=301 "c303wc301"`,
- `GET / "c303wc301"`,
+ `GET /?code=301 ""`,
+ `GET / ""`,
`POST /?code=304 "c304"`,
`POST /?code=305 "c305"`,
`POST /?code=307&next=303,308,302 "c307"`,
`POST /?code=303&next=308,302 "c307"`,
- `GET /?code=308&next=302 "c307"`,
+ `GET /?code=308&next=302 ""`,
`GET /?code=302 "c307"`,
- `GET / "c307"`,
+ `GET / ""`,
`POST /?code=308&next=302,301 "c308"`,
`POST /?code=302&next=301 "c308"`,
- `GET /?code=301 "c308"`,
- `GET / "c308"`,
+ `GET /?code=301 ""`,
+ `GET / ""`,
`POST /?code=404 "c404"`,
}
want := strings.Join(wantSegments, "\n")
@@ -399,20 +399,20 @@ func TestDeleteRedirects(t *testing.T) {
wantSegments := []string{
`DELETE / "first"`,
`DELETE /?code=301&next=302,308 "c301"`,
- `GET /?code=302&next=308 "c301"`,
- `GET /?code=308 "c301"`,
+ `GET /?code=302&next=308 ""`,
+ `GET /?code=308 ""`,
`GET / "c301"`,
`DELETE /?code=302&next=302 "c302"`,
- `GET /?code=302 "c302"`,
- `GET / "c302"`,
+ `GET /?code=302 ""`,
+ `GET / ""`,
`DELETE /?code=303 "c303"`,
- `GET / "c303"`,
+ `GET / ""`,
`DELETE /?code=307&next=301,308,303,302,304 "c307"`,
`DELETE /?code=301&next=308,303,302,304 "c307"`,
- `GET /?code=308&next=303,302,304 "c307"`,
+ `GET /?code=308&next=303,302,304 ""`,
`GET /?code=303&next=302,304 "c307"`,
- `GET /?code=302&next=304 "c307"`,
- `GET /?code=304 "c307"`,
+ `GET /?code=302&next=304 ""`,
+ `GET /?code=304 ""`,
`DELETE /?code=308&next=307 "c308"`,
`DELETE /?code=307 "c308"`,
`DELETE / "c308"`,
@@ -432,7 +432,11 @@ func testRedirectsByMethod(t *testing.T, method string, table []redirectTest, wa
ts = httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
log.Lock()
slurp, _ := ioutil.ReadAll(r.Body)
- fmt.Fprintf(&log.Buffer, "%s %s %q\n", r.Method, r.RequestURI, slurp)
+ fmt.Fprintf(&log.Buffer, "%s %s %q", r.Method, r.RequestURI, slurp)
+ if cl := r.Header.Get("Content-Length"); r.Method == "GET" && len(slurp) == 0 && (r.ContentLength != 0 || cl != "") {
+ fmt.Fprintf(&log.Buffer, " (but with body=%T, content-length = %v, %q)", r.Body, r.ContentLength, cl)
+ }
+ log.WriteByte('\n')
log.Unlock()
urlQuery := r.URL.Query()
if v := urlQuery.Get("code"); v != "" {
@@ -475,7 +479,24 @@ func testRedirectsByMethod(t *testing.T, method string, table []redirectTest, wa
want = strings.TrimSpace(want)

if got != want {
- t.Errorf("Log differs.\n Got:\n%s\nWant:\n%s\n", got, want)
+ got, want, lines := removeCommonLines(got, want)
+ t.Errorf("Log differs after %d common lines.\n\nGot:\n%s\n\nWant:\n%s\n", lines, got, want)
+ }
+}
+
+func removeCommonLines(a, b string) (asuffix, bsuffix string, commonLines int) {
+ for {
+ nl := strings.IndexByte(a, '\n')
+ if nl < 0 {
+ return a, b, commonLines
+ }
+ line := a[:nl+1]
+ if !strings.HasPrefix(b, line) {
+ return a, b, commonLines
+ }
+ commonLines++
+ a = a[len(line):]
+ b = b[len(line):]
}
}

diff --git a/libgo/go/net/http/serve_test.go b/libgo/go/net/http/serve_test.go
index 681dff1..73dd56e 100644
--- a/libgo/go/net/http/serve_test.go
+++ b/libgo/go/net/http/serve_test.go
@@ -5277,7 +5277,7 @@ func TestServerHijackGetsBackgroundByte_big(t *testing.T) {
defer conn.Close()
slurp, err := ioutil.ReadAll(buf.Reader)
if err != nil {
- t.Error("Copy: %v", err)
+ t.Errorf("Copy: %v", err)
}
allX := true
for _, v := range slurp {
diff --git a/libgo/merge.sh b/libgo/merge.sh
index c750a5d..bdf0043 100755
--- a/libgo/merge.sh
+++ b/libgo/merge.sh
@@ -71,7 +71,9 @@ merge() {
elif test -f ${old}; then
# The file exists in the old version.
if ! test -f ${libgo}; then
- echo "merge.sh: $name: skipping: exists in old and new git, but not in libgo"
+ if ! cmp -s ${old} ${new}; then
+ echo "merge.sh: $name: skipping: exists in old and new git, but not in libgo"
+ fi
continue
fi
if cmp -s ${old} ${libgo}; then

b6a78a8 libgo: update to go1.8rc3
libgo/MERGE | 2 +-
libgo/VERSION | 2 +-
libgo/go/cmd/go/go_test.go | 23 +++++
libgo/go/cmd/go/pkg.go | 2 +-
libgo/go/database/sql/sql.go | 91 +++++++++++++------
libgo/go/database/sql/sql_test.go | 123 +++++++++++++++++++++-----
libgo/go/go/printer/nodes.go | 17 ++--
libgo/go/go/printer/printer.go | 11 ++-
libgo/go/go/printer/testdata/comments2.golden | 59 ++++++++++++
libgo/go/go/printer/testdata/comments2.input | 63 +++++++++++++
libgo/go/net/http/client.go | 21 +++--
libgo/go/net/http/client_test.go | 61 ++++++++-----
libgo/go/net/http/serve_test.go | 2 +-
libgo/merge.sh | 4 +-
14 files changed, 389 insertions(+), 92 deletions(-)

Upstream: gcc.gnu.org


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