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database/sql: fix Conn leak
Fixes #4902 R=golang-dev, alex.brainman, r, google CC=golang-dev https://golang.org/cl/7579045
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@ -445,6 +445,7 @@ func (db *DB) prepare(query string) (*Stmt, error) {
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css: []connStmt{{ci, si}},
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}
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db.addDep(stmt, stmt)
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db.putConn(ci, nil)
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return stmt, nil
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}
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@ -708,3 +708,32 @@ func TestQueryRowNilScanDest(t *testing.T) {
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t.Errorf("error = %q; want %q", err.Error(), want)
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}
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}
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func TestIssue4902(t *testing.T) {
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db := newTestDB(t, "people")
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defer closeDB(t, db)
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driver := db.driver.(*fakeDriver)
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opens0 := driver.openCount
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var stmt *Stmt
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var err error
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for i := 0; i < 10; i++ {
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stmt, err = db.Prepare("SELECT|people|name|")
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if err != nil {
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t.Fatal(err)
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}
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err = stmt.Close()
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if err != nil {
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t.Fatal(err)
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}
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}
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opens := driver.openCount - opens0
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if opens > 1 {
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t.Errorf("opens = %d; want <= 1", opens)
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t.Logf("db = %#v", db)
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t.Logf("driver = %#v", driver)
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t.Logf("stmt = %#v", stmt)
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}
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}
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