bug#5490: 23.1.91; CC Mode, after a while, everything is topmost-intro.

[Jan Djärv]

Ok, here are some answers.

Alan Mackenzie skrev:
> OK.  Now some more details, please!
>
> (i) Have you ever noticed this bug happening on earlier Emacsen, in
>   particular Emacs 23.1?

No.

> (ii) Does this bug happen every time you use Emacs this long, or only
>   sometimes?  If the latter, how often (10%, 50%, 90%)?

100%.  If I just keep editing it eveentually breaks.

> (iii) Do you think there might be any connection with some of the more
>   unusual minor modes you've got switched on?  Things like
>   auto-encryption mode?

No, this doesn't seem to have any effect.

> When Emacs reaches this broken state:
> (iv) Are all C(++) buffers in this state, or only some?  Any correlation
>   with how many edits have been done on a buffer, or how long it's been
>   loaded?

It is a pre buffer breakage.  One buffer usually gets borken first, while the 
others are ok.  It is the one that I've changed/edited the most in.

> (v) What about indentation in a freshly loaded file?

No problem.

> (vi) Will M-x c-mode or M-x c++-mode clear the problem?

Yes.

> (vii) Does reverting (M-x revert-buffer) a file fix indentation?

No.

> (viii) Does killing and reloading a file fix indentation?

Yes.

> (ix) Does intentation gradually deteriorate at around 4 hours, or does it
>   break suddenly?

Suddenly.

> (x) Do all CC Mode buffers break at the same time, or is it a "creeping
>   death"?

Only one at the time.


> Just one other thing: Could you please post a dump of your CC Mode
> configuration (C-c C-b in a C(++) buffer).  Thanks.

X-Reporter-Void-Vars-Found: auto-fill-mode (setq
 c-basic-offset 4
 c-comment-only-line-offset 0
 c-indent-comment-alist '((anchored-comment column . 0) (end-block space . 1)
                          (cpp-end-block space . 2))
 c-indent-comments-syntactically-p nil
 c-block-comment-prefix "* "
 c-comment-prefix-regexp '((pike-mode . "//+!?\\|\\**") (awk-mode . "#+")
                           (other . "//+\\|\\**"))
 c-doc-comment-style '((java-mode . javadoc) (pike-mode . autodoc)
                       (c-mode . gtkdoc))
 c-cleanup-list '(defun-close-semi list-close-comma scope-operator)
 c-hanging-braces-alist '((substatement-open before after)
                          (brace-list-open before after)
                          (brace-list-intro after) (brace-list-entry)
                          (brace-list-close before after)
                          (block-close . c-snug-do-while))
 c-hanging-colons-alist '((access-label after) (case-label after)
                          (label after) (member-init-intro before)
                          (inher-intro))
 c-hanging-semi&comma-criteria '(c-semi&comma-inside-parenlist)
 c-backslash-column 48
 c-backslash-max-column 72
 c-special-indent-hook nil
 c-label-minimum-indentation 1
 c-offsets-alist '((inexpr-class . c-lineup-inexpr-block)
                   (inexpr-statement . +)
                   (lambda-intro-cont . +)
                   (inlambda . c-lineup-inexpr-block)
                   (template-args-cont c-lineup-template-args +)
                   (incomposition . +)
                   (inmodule . +)
                   (innamespace . 0)
                   (inextern-lang . +)
                   (composition-close . 0)
                   (module-close . 0)
                   (namespace-close . 0)
                   (extern-lang-close . 0)
                   (composition-open . 0)
                   (module-open . 0)
                   (namespace-open . 0)
                   (extern-lang-open . 0)
                   (objc-method-call-cont
                    c-lineup-ObjC-method-call-colons
                    c-lineup-ObjC-method-call
                    +
                    )
                   (objc-method-args-cont . c-lineup-ObjC-method-args)
                   (objc-method-intro . [0])
                   (friend . 0)
                   (cpp-define-intro c-lineup-cpp-define +)
                   (cpp-macro-cont . +)
                   (cpp-macro . [0])
                   (inclass . +)
                   (stream-op . c-lineup-streamop)
                   (arglist-cont-nonempty
                    c-lineup-gcc-asm-reg
                    c-lineup-arglist
                    )
                   (arglist-cont c-lineup-gcc-asm-reg 0)
                   (comment-intro
                    c-lineup-knr-region-comment
                    c-lineup-comment
                    )
                   (catch-clause . 0)
                   (else-clause . 0)
                   (do-while-closure . 0)
                   (access-label . -1000)
                   (case-label . 0)
                   (substatement . +)
                   (statement-case-intro . +)
                   (statement . 0)
                   (brace-entry-open . 0)
                   (brace-list-entry . 0)
                   (brace-list-intro . +)
                   (brace-list-close . 0)
                   (block-close . 0)
                   (block-open . 0)
                   (inher-cont . c-lineup-multi-inher)
                   (inher-intro . +)
                   (member-init-cont . c-lineup-multi-inher)
                   (member-init-intro . +)
                   (topmost-intro . 0)
                   (knr-argdecl . 0)
                   (func-decl-cont . +)
                   (inline-close . 0)
                   (class-close . 0)
                   (class-open . 0)
                   (defun-block-intro . +)
                   (defun-close . 0)
                   (defun-open . 0)
                   (c . c-lineup-C-comments)
                   (string . c-lineup-dont-change)
                   (topmost-intro-cont . 0)
                   (brace-list-open . 0)
                   (inline-open . 0)
                   (arglist-close . c-lineup-arglist)
                   (arglist-intro . c-lineup-arglist)
                   (statement-cont . +)
                   (statement-case-open . 0)
                   (label . -1000)
                   (substatement-label . 2)
                   (substatement-open . 0)
                   (knr-argdecl-intro . +)
                   (statement-block-intro . +)
                   )
 c-buffer-is-cc-mode 'c++-mode
 c-tab-always-indent t
 c-syntactic-indentation t
 c-syntactic-indentation-in-macros t
 c-ignore-auto-fill '(string cpp code)
 c-auto-align-backslashes t
 c-backspace-function 'backward-delete-char-untabify
 c-delete-function 'delete-char
 c-electric-pound-behavior '(alignleft)
 c-default-style '((java-mode . "java") (awk-mode . "awk") (other . "gnu"))
 c-enable-xemacs-performance-kludge-p nil
 c-old-style-variable-behavior nil
 defun-prompt-regexp nil
 tab-width 8
 comment-column 32
 parse-sexp-ignore-comments t
 parse-sexp-lookup-properties t
 auto-fill-function nil
 comment-multi-line t
 comment-start-skip "\\(//+\\|/\\*+\\)\\s *"
 fill-prefix nil
 fill-column 70
 paragraph-start "[        ]*\\(//+\\|\\**\\)[     ]*$\\|^\f"
 adaptive-fill-mode t
 adaptive-fill-regexp "[ 	]*\\(//+\\|\\**\\)[ 	]*\\([ 
]*\\([-!|#%;>*·•‣⁃◦]+[ 	]*\\)*\\)"
 )

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Emacs  : GNU Emacs 23.1.92.1 (i686-pc-linux-gnu, GTK+ Version 2.18.3)
 of 2010-02-03 on cons1
Package: CC Mode 5.31.8 (C++/lah)
Buffer Style: JHD
c-emacs-features: (pps-extended-state col-0-paren posix-char-classes 
gen-string-delim gen-comment-delim syntax-properties 1-bit)

        Jan D.