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-rw-r--r--test/fixedbugs/issue26411.go92
1 files changed, 92 insertions, 0 deletions
diff --git a/test/fixedbugs/issue26411.go b/test/fixedbugs/issue26411.go
new file mode 100644
index 0000000..eb17960
--- /dev/null
+++ b/test/fixedbugs/issue26411.go
@@ -0,0 +1,92 @@
+// +build !nacl,!js
+// run
+
+// 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.
+
+// Ensure that label redefinition errors print out
+// a column number that matches the start of the current label's
+// definition instead of the label delimiting token ":"
+
+package main
+
+import (
+ "bytes"
+ "fmt"
+ "io/ioutil"
+ "log"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "regexp"
+)
+
+func main() {
+ tmpdir, err := ioutil.TempDir("", "issue26411")
+ if err != nil {
+ log.Fatalf("Failed to create temporary directory: %v", err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ tests := []struct {
+ code string
+ errors []string
+ }{
+ {
+ code: `
+package main
+
+func main() {
+foo:
+foo:
+}
+`,
+ errors: []string{
+ "^.+:5:1: label foo defined and not used\n",
+ ".+:6:1: label foo already defined at .+:5:1\n$",
+ },
+ },
+ {
+ code: `
+package main
+
+func main() {
+
+ bar:
+ bar:
+bar:
+bar :
+}
+`,
+
+ errors: []string{
+ "^.+:6:13: label bar defined and not used\n",
+ ".+:7:4: label bar already defined at .+:6:13\n",
+ ".+:8:1: label bar already defined at .+:6:13\n",
+ ".+:9:1: label bar already defined at .+:6:13\n$",
+ },
+ },
+ }
+
+ for i, test := range tests {
+ filename := filepath.Join(tmpdir, fmt.Sprintf("%d.go", i))
+ if err := ioutil.WriteFile(filename, []byte(test.code), 0644); err != nil {
+ log.Printf("#%d: failed to create file %s", i, filename)
+ continue
+ }
+ output, _ := exec.Command("go", "tool", "compile", "-p=p", filename).CombinedOutput()
+
+ // remove each matching error from the output
+ for _, err := range test.errors {
+ rx := regexp.MustCompile(err)
+ match := rx.Find(output)
+ output = bytes.Replace(output, match, nil, 1) // remove match (which might be nil) from output
+ }
+
+ // at this point all output should have been consumed
+ if len(output) != 0 {
+ log.Printf("Test case %d has unmatched errors:\n%s", i, output)
+ }
+ }
+}