Don't allow accidentally publishing to pub.dartlang.org from the dev version of pub.

sdk/lib/_internal/pub/lib/src/command/lish.dart

Index: sdk/lib/_internal/pub/lib/src/command/lish.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command/lish.dart b/sdk/lib/_internal/pub/lib/src/command/lish.dart
index d5b6b50f51009ff2ff4f733175a4962d3f74c4ca..1cc95ace29773c7b68628666a7b7a8dddbbf7371 100644
--- a/sdk/lib/_internal/pub/lib/src/command/lish.dart
+++ b/sdk/lib/_internal/pub/lib/src/command/lish.dart
@@ -15,6 +15,7 @@ import '../http.dart';
 import '../io.dart';
 import '../log.dart' as log;
 import '../oauth2.dart' as oauth2;
+import '../sdk.dart' as sdk;
 import '../source/hosted.dart';
 import '../utils.dart';
 import '../validator.dart';
@@ -93,6 +94,15 @@ class LishCommand extends PubCommand {
   }
 
   Future onRun() {
+    // Sanity check. Don't push to the production server when running tests or
+    // developing on pub.
+    if (sdk.isBleedingEdge &&
+        server.toString() == HostedSource.defaultUrl &&
+        !dryRun) {
+      log.error('Cannot publish to $server from bleeding edge pub!');
+      return null;
+    }
+
     if (force && dryRun) {
       log.error('Cannot use both --force and --dry-run.');
       this.printUsage();