docwriter: Handle invalid nodes better

Cogl-2.0.gir has the following entry:

    <bitfield name="BufferMapHint"
              version="1.4"
              stability="Unstable"
              c:type="CoglBufferMapHint">
      <doc xml:whitespace="preserve">...</doc>
      <member name="" value="1"
              c:identifier="COGL_BUFFER_MAP_HINT_DISCARD">
        <doc xml:whitespace="preserve">...</doc>
      </member>
      <member name="_range"
              value="2"
              c:identifier="COGL_BUFFER_MAP_HINT_DISCARD_RANGE">
        <doc xml:whitespace="preserve">...</doc>
      </member>
    </bitfield>

The prefix is not picked up correctly and so we get a member without a
name, which crashes the docwriter in to_underscore(). Change that
function to handle this case by giving it a dummy "anonymous member"
name.

1 files changed, 10 insertions, 0 deletions

diff --git a/giscanner/docwriter.py b/giscanner/docwriter.py
index e5a025ba..754787e3 100644
--- a/giscanner/docwriter.py
+++ b/giscanner/docwriter.py
@@ -28,6 +28,7 @@ from __future__ import unicode_literals
 
 import os
 import re
+import sys
 import tempfile
 
 from xml.sax import saxutils
@@ -1131,6 +1132,15 @@ class DevDocsFormatterGjs(DocFormatterGjs):
             link += "#" + anchor
         return "[{}]({}){}".format(display_name, link, 's' if pluralize else '')
 
+    def to_underscores(self, node):
+        try:
+            return super(DevDocsFormatterGjs, self).to_underscores(node)
+        except Exception as e:
+            if e.message == 'invalid node':
+                print('warning: invalid node in', node.parent.name,
+                    file=sys.stderr)
+                return node.parent.name + '_invalid_node'
+
     def make_anchor(self, node):
         style_class = get_node_kind(node)
         return "{}-{}".format(style_class, self.to_underscores(node))