https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100389
Bug ID: 100389
Summary: "invalid type conversion" error for string-based error
type
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: ben.hutchings at essensium dot com
CC: cmang at google dot com
Target Milestone: ---
Given the following source files:
$ cat main.go
package main
import (
"foo"
"os"
)
func main() {
if !foo.IsInUse(foo.Remove()) {
os.Exit(1)
}
}
$ cat src/foo/foo.go
package foo
const (
errVolumeInUse conflictError = "volume is in use"
)
type conflictError string
func (e conflictError) Error() string {
return string(e)
}
func IsInUse(err error) bool {
return isErr(err, errVolumeInUse)
}
func isErr(err error, expected error) bool {
return err == expected
}
func Remove() error {
return errVolumeInUse
}
gccgo (from Debian package version 10.2.1-6) reports:
$ GOPATH=$PWD go build .
# _/home/bwh/tmp/gotest
./src/foo/foo.go:22: error: invalid type conversion (type has no methods)
./src/foo/foo.go:14: error: invalid type conversion (type has no methods)
Whereas gc (from Debian package version 1.15.9-1) builds these successfully.
