Log traceback for config errors

When we display the error graphically, we show the traceback. In tests however,
we don't see the traceback anywhere, so let's add it to the debug logs.

1 files changed, 5 insertions, 1 deletions

diff --git a/qutebrowser/config/configexc.py b/qutebrowser/config/configexc.py
index 9f53847cb..df171c365 100644
--- a/qutebrowser/config/configexc.py
+++ b/qutebrowser/config/configexc.py
@@ -22,7 +22,7 @@
 import typing
 import attr
 
-from qutebrowser.utils import jinja, usertypes
+from qutebrowser.utils import jinja, usertypes, log
 
 
 class Error(Exception):
@@ -146,6 +146,10 @@ class ConfigFileErrors(Error):
             basename, '\n'.join('  {}'.format(e) for e in errors)))
         self.basename = basename
         self.errors = errors
+        for err in errors:
+            if err.traceback:
+                log.config.debug("Config error stack:")
+                log.config.debug(err.traceback)
 
     def to_html(self) -> str:
         """Get the error texts as a HTML snippet."""