CC Mode 5.27 (C++); indentation walks across page (repeatable!)

[<nb...@fr...>]

Here's the test case:

#ifndef Modulator_H
#define Modulator_H

#include <pair>

pair<int> uwbits[] = {
  {1,    1},
    {0,    0},
      {0,    1},
	{0,    0},
	  {0,    1},
	    {1,    1},
	      {1,    0},
		{0,    0},
		  {1,    1},
		    {1,    1},
		      {0,    0},
			{0,    0},
			  {0,    0},
			    {1,    1},
			      {0,    1},
				{1,    0},
				  {0,    1},
				    {1,    1},
				      {1,    0},
					{0,    1},
					  {1,    1},
					    {1,    1},
					      {1,    0},
						{1,    0},
						  {1,    1},
						    {1,    1},
						      {1,    1}
};

#endif


Emacs  : XEmacs 21.1 (patch 12) "Channel Islands" [Lucid] (i386-redhat-linux) of Thu Aug 24 2000 on porky.devel.redhat.com
Package: CC Mode 5.27 (C++)
Buffer Style: gnu

c-emacs-features: (8-bit)

current state:
==============
(setq
 c-basic-offset 2
 c-comment-only-line-offset '(0 . 0)
 c-block-comment-prefix ""
 c-comment-prefix-regexp "//+\\|\\**"
 c-cleanup-list '(scope-operator)
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			  (block-close . c-snug-do-while) (extern-lang-open after)
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		   (c . c-lineup-C-comments)
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		   (inher-cont . c-lineup-multi-inher)
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		   (arglist-cont . 0)
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		   (inclass . +)
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		   (objc-method-call-cont . c-lineup-ObjC-method-call)
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		   (template-args-cont c-lineup-template-args +)
		   (inlambda . c-lineup-inexpr-block)
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		   (inexpr-class . +)
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		   (knr-argdecl-intro . 5)
		   (substatement-open . +)
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		   (statement-case-open . +)
		   (statement-cont . +)
		   (arglist-intro . c-lineup-arglist-intro-after-paren)
		   (arglist-close . c-lineup-arglist)
		   (inline-open . 0)
		   (brace-list-open . +)
		   )
 c-delete-function 'delete-char
 c-electric-pound-behavior nil
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 c-tab-always-indent t
 defun-prompt-regexp nil
 tab-width 8
 comment-column 32
 parse-sexp-ignore-comments t
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 filladapt-mode t
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 comment-start-skip "/\\*+ *\\|//+ *"
 fill-prefix nil
 paragraph-start "[ 	]*\\(//+\\|\\**\\)?[ 	]*$\\|^"
 adaptive-fill-mode t
 adaptive-fill-regexp "[ 	]*\\(//+\\|\\**\\)?[ 	]*\\([ 	]*\\([#;>*]+ +\\)?\\)"
 )