+(defvar notmuch-show-attachment-debug nil
+ "If t log stdout and stderr from attachment handlers
+
+When set to nil (the default) stdout and stderr from attachment
+handlers is discarded. When set to t the stdout and stderr from
+each attachment handler is logged in buffers with names beginning
+\" *notmuch-part*\". This option requires emacs version at least
+24.3 to work.")
+