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text/template: fix nil crash on Templates

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Fixes #3872.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6612060
This commit is contained in:
Rob Pike 2012-10-07 09:26:59 +11:00
parent 421b75c0db
commit bcccad4020
2 changed files with 8 additions and 0 deletions
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5
src/pkg/text/template/exec_test.go
View File

@ -811,3 +811,8 @@ func TestTree(t *testing.T) {
t.Errorf("expected %q got %q", expect, result) t.Errorf("expected %q got %q", expect, result)
} }
} }
func TestExecuteOnNewTemplate(t *testing.T) {
// This is issue 3872.
_ = New("Name").Templates()
}

3
src/pkg/text/template/template.go
View File

@ -117,6 +117,9 @@ func (t *Template) AddParseTree(name string, tree *parse.Tree) (*Template, error
// Templates returns a slice of the templates associated with t, including t // Templates returns a slice of the templates associated with t, including t
// itself. // itself.
func (t *Template) Templates() []*Template { func (t *Template) Templates() []*Template {
if t.common == nil {
return nil
}
// Return a slice so we don't expose the map. // Return a slice so we don't expose the map.
m := make([]*Template, 0, len(t.tmpl)) m := make([]*Template, 0, len(t.tmpl))
for _, v := range t.tmpl { for _, v := range t.tmpl {