go/test/fixedbugs/issue23586.go
Robert Griesemer 4360fd8d6f go/types, types2: use "and not used" instead of "but not used" in error messages
This matches longstanding compiler behavior.

Also, for unused packages, report:

`"pkg" imported and not used`
`"pkg" imported as X and not used`

This matches the other `X declared and not used` errors.

For #55326.

Change-Id: Ie71cf662fb5f4648449c64fc51bede298a1bdcbf
Reviewed-on: https://go-review.googlesource.com/c/go/+/432557
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
2022-09-27 21:10:19 +00:00

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Go

// errorcheck
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test that we type-check deferred/go functions even
// if they are not called (a common error). Specifically,
// we don't want to see errors such as import or variable
// declared and not used.
package p
import (
"fmt"
"math"
)
func f() {
var i int
defer func() { fmt.Println() } // ERROR "must be function call"
go func() { _ = math.Sin(0) } // ERROR "must be function call"
go func() { _ = i} // ERROR "must be function call"
}