1 files changed, 7 insertions, 5 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 5e645535a23..9636f7eaeae 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -292,9 +292,9 @@ The criteria are that the previous line ends in a backslash outside
 comments and strings, or that the bracket/paren nesting depth is nonzero."
   (or (and (eq ?\\ (char-before (line-end-position 0)))
            (not (syntax-ppss-context (syntax-ppss))))
-      (/= 0 (syntax-ppss-depth
-             (save-excursion      ; syntax-ppss with arg changes point
-               (syntax-ppss (line-beginning-position)))))))
+      (< 0 (syntax-ppss-depth
+            (save-excursion       ; syntax-ppss with arg changes point
+              (syntax-ppss (line-beginning-position)))))))
 
 (defun python-comment-line-p ()
   "Return non-nil iff current line has only a comment."
@@ -719,7 +719,10 @@ expressions."
         (python-beginning-of-string)
         ;; Skip forward out of nested brackets.
         (condition-case ()              ; beware invalid syntax
-            (progn (backward-up-list (syntax-ppss-depth (syntax-ppss))) t)
+            (let ((depth (syntax-ppss-depth (syntax-ppss))))
+              ;; Beware negative depths.
+              (if (> depth 0) (backward-up-list depth))
+              t)
           (error (throw 'foo nil))))))
   (back-to-indentation))
 
@@ -1755,7 +1758,6 @@ lines count as headers.
   (if (featurep 'hippie-exp)
       (set (make-local-variable 'hippie-expand-try-functions-list)
            (cons 'python-try-complete hippie-expand-try-functions-list)))
-  (unless font-lock-mode (font-lock-mode 1))
   (when python-guess-indent (python-guess-indent))
   (set (make-local-variable 'python-command) python-python-command)
   (unless (boundp 'python-mode-running) ; kill the recursion from jython-mode