dump the JSON we are going to submit to GH to create the issue

src/tools/publish_toolstate.py

@@ -77,9 +77,7 @@ def issue(
         status_description = 'has failing tests'
     else:
         status_description = 'no longer builds'
-    response = urllib2.urlopen(urllib2.Request(
-        gh_url(),
-        json.dumps({
+    request = json.dumps({
         'body': maybe_delink(textwrap.dedent('''\
         Hello, this is your friendly neighborhood mergebot.
         After merging PR {}, I observed that the tool {} {}.
@@ -97,7 +95,11 @@ def issue(
         'title': '`{}` no longer builds after {}'.format(tool, relevant_pr_number),
         'assignees': assignees,
         'labels': ['T-compiler', 'I-nominated'],
-        }),
+    })
+    print("Creating issue:\n{}".format(request))
+    response = urllib2.urlopen(urllib2.Request(
+        gh_url(),
+        request,
         {
             'Authorization': 'token ' + github_token,
             'Content-Type': 'application/json',