example.html

${chrome.logging.debug("This is a log message in a genshi template")}

trac.web.chrome.py.diff

--- a/trac/web/chrome.py
+++ b/trac/web/chrome.py
@@ -660,6 +660,7 @@ class Chrome(Component):
 
         chrome = {'metas': [], 'links': {}, 'scripts': [], 'script_data': {},
                   'ctxtnav': [], 'warnings': [], 'notices': []}
+        chrome['logging'] = self.log
         req.chrome = chrome
 
         htdocs_location = self.htdocs_location or req.href.chrome('common')