bug#11749: Acknowledgement (24.1; C-mode indentation gives wrong-type-argument error.)

[Kim Storm]

On 2012-09-02 23:16, Alan Mackenzie wrote:
> Yes. It looks like the "state cache" (a cache of certain brace, paren 
> and bracket positions) has got corrupted.
> This is difficult to make repeatable, and is very dependent upon the 
> exact navigation taken around the C buffer.
Well - my navigation triggers that bug a lot.


> > Debugger entered--Lisp error: (error "Invalid search bound (wrong side
> > of point)")
> >     re-search-backward("^[     ]*:[     ]*\\(.\\)?" 5920 t)
> >     c-lineup-gcc-asm-reg((arglist-cont-nonempty . 5920))
> >     c-evaluate-offset(c-lineup-gcc-asm-reg (arglist-cont-nonempty 5920
> > 5950) arglist-cont-nonempty)
> >     c-evaluate-offset((c-lineup-gcc-asm-reg c-lineup-arglist)
> > (arglist-cont-nonempty 5920 5950) arglist-cont-nonempty)
> >     c-calc-offset((arglist-cont-nonempty 5920 5950))
> >     c-get-syntactic-indentation(((arglist-cont-nonempty 5920 5950)))
> >     c-indent-line()
> >     indent-according-to-mode()
> >     c-electric-paren(nil)
> >     call-interactively(c-electric-paren nil nil)
> That looks a bit like bug #10941, but isn't it.  It could be something
> quite easy inside `c-lineup-gcc-asm-reg' (which I've not seen being used
> before).  Is this an easily repeatable bug?  Any chance of a recipe?
> Would you also dump your CC Mode configuration (C-c C-b) please.
I think I only saw this once - the other bug already happened, and I 
just started typing some random code snippets, and this bug happened.
> > Debugger entered--Lisp error: (wrong-type-argument integer-or-marker-p
> > (5874 . 5881))
> >     c-guess-basic-syntax()
> >     c-indent-line()
> >     indent-according-to-mode()
> >     c-electric-paren(nil)
> >     call-interactively(c-electric-paren nil nil)
>
> I've not been able to reproduce it in that limited context.  It looks
> like another bug in the state cache, and they're bastards.
Any way of clearing the cache?
> Might you have something unusual in your CC Mode config?
I have this:

(modify-syntax-entry ?_ "w" c-mode-syntax-table)

But otherwise, I don't seem to have any customizations ... only an 
awkward programming style :-)


_Subject: CC Mode 5.32.3 (C/l); emacs bug 11749

_ X-Reporter-Void-Vars-Found: auto-fill-mode (setq
c-basic-offset 2
c-comment-only-line-offset '(0 . 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 '(scope-operator)
c-hanging-braces-alist '((substatement-open before after) 
(arglist-cont-nonempty))
c-hanging-colons-alist nil
c-hanging-semi&comma-criteria '(c-semi&comma-inside-parenlist)
c-backslash-column 48
c-backslash-max-column 72
c-special-indent-hook '(c-gnu-impose-minimum)
c-label-minimum-indentation 1
c-offsets-alist '((inexpr-class . +)
(inexpr-statement . +)
(lambda-intro-cont . +)
(inlambda . c-lineup-inexpr-block)
(template-args-cont c-lineup-template-args +)
(incomposition . +)
(inmodule . +)
(innamespace . +)
(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 . -)
(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 . +)
(annotation-var-cont . +)
(annotation-top-cont . 0)
(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 first c-lineup-topmost-intro-cont 
c-lineup-gnu-DEFUN-intro-cont)
(brace-list-open . +)
(inline-open . 0)
(arglist-close . c-lineup-arglist)
(arglist-intro . c-lineup-arglist-intro-after-paren)
(statement-cont . +)
(statement-case-open . +)
(label . 0)
(substatement-label . 0)
(substatement-open . +)
(knr-argdecl-intro . 5)
(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 nil
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 "[ ]*\\(//+\\|\\**\\)[ ]*\\([ 
]*\\([-–!|#%;>*·•‣⁃◦]+[ ]*\\)*\\)"
)

Emacs : GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
of 2012-08-24 on kfs-lx2
Package: CC Mode 5.32.3 (C/l)
Buffer Style: gnu
c-emacs-features: (pps-extended-state col-0-paren posix-char-classes 
gen-string-delim gen-comment-delim syntax-properties 1-bit)

current state:
==============