godoc: fix crash

R=iant, rsc
CC=golang-dev
https://golang.org/cl/5500065

diff --git a/src/pkg/go/doc/doc.go b/src/pkg/go/doc/doc.go
index facc92a2a83be5482468c690054be33b82bb1f55..52ebda5ea29de2cfa6ac09c732509d05ebe85141 100644 (file)
--- a/src/pkg/go/doc/doc.go
+++ b/src/pkg/go/doc/doc.go
@@ -258,7 +258,7 @@ func (doc *docReader) addDecl(decl ast.Decl) {
                                        case *ast.InterfaceType:
                                                fields = typ.Methods
                                        }
-                                       if fields == nil {
+                                       if fields != nil {
                                                for _, field := range fields.List {
                                                        if len(field.Names) == 0 {
                                                                // anonymous field