413761 - 100% cpu usage after one hour with phpmyadmin 4:2.10.1-2 open

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Karl Vollmer]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b2) Gecko/2007121016 Firefox/3.0b2
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b2) Gecko/2007121016 Firefox/3.0b2

After leaving a instance of Firefox up for about an hour with one tab pointing at phpmyadmin, and a second tab pointing at my personal Ampache instance the browser started using 100% CPU. After sshing in remotely as X had become unresponsive I was able to kill Firefox, X recovered and terminal showed the following

I'm hesitant to blame Ampache (the other tab) as I have two other copies of Firefox with Ampache tabs open and they haven't acted up, this is the only instance with phpmyadmin up. 

vollmerk@lanfear:~/firefox$ ./firefox

(gecko:3578): Pango-WARNING **: failed to create cairo scaled font, expect ugly 
output. the offending font is 'DejaVu Sans 0'

(gecko:3578): Pango-WARNING **: failed to create cairo scaled font, expect ugly 
output. the offending font is 'DejaVu Sans 0'

(gecko:3578): Pango-WARNING **: shaping failure, expect ugly output. shape-engin
e='BasicEngineFc', font='DejaVu Sans 0', text='English Hello'

(gecko:3578): Pango-WARNING **: pango_font_get_glyph_extents called with null fo
nt argument, expect ugly output
Warning: Cannot convert string "-*-helvetica-medium-r-normal--12-*-*-*-*-*-iso88
59-1" to type FontStruct
Warning: Cannot convert string "-*-courier-medium-r-normal--12-*-*-*-*-*-iso8859
-1" to type FontStruct
Warning: Cannot convert string "-*-times-bold-i-normal--20-*-*-*-*-*-iso8859-1" 
to type FontStruct
Warning: Cannot convert string "-*-times-medium-r-normal--16-*-*-*-*-*-iso8859-1
" to type FontStruct
XtUngrabButton(drawArea,3,0)
Warning: Attempt to remove nonexistent passive grab
vollmerk@lanfear:~/firefox$ ./firefox

(gecko:12239): Pango-WARNING **: failed to create cairo scaled font, expect ugly
 output. the offending font is 'DejaVu Sans 0'

(gecko:12239): Pango-WARNING **: failed to create cairo scaled font, expect ugly
 output. the offending font is 'DejaVu Sans 0'

(gecko:12239): Pango-WARNING **: shaping failure, expect ugly output. shape-engi
ne='BasicEngineFc', font='DejaVu Sans 0', text='English Hello'

(gecko:12239): Pango-WARNING **: pango_font_get_glyph_extents called with null f
ont argument, expect ugly output
./run-mozilla.sh: line 131: 12239 Terminated              "$prog" ${1+"$@"}


Reproducible: Sometimes

Steps to Reproduce:
1.Open a tab to Phpmyadmin 4:2.10.1-2 and a tab to Ampache 3.4
2.Wait a while 

Actual Results:  
Browser used 100% CPU and entire machine became unresponsive

Expected Results:  
Not using 100% CPU and making the box unresponsive... ;-)

lanfear:/home/vollmerk# dpkg --list | grep "font"
ii  console-data                      2:1.04-3                        Keymaps, fonts, charset maps, fallback tables for 
sole-tools
ii  console-tools                     1:0.2.3dbs-65                   Linux console and font utilities
ii  defoma                            0.11.10-0.1                     Debian Font Manager -- automatic font configuratio
ramework
ii  fontconfig                        2.5.0-2                         generic font configuration library - support binar
ii  fontconfig-config                 2.5.0-2                         generic font configuration library - configuration
ii  gsfonts                           1:8.11+urwcyr1.0.7~pre43-1      Fonts for the Ghostscript interpreter(s)
ii  libconsole                        1:0.2.3dbs-65                   Shared libraries for Linux console and font manipu
ion
ii  libfontconfig1                    2.5.0-2                         generic font configuration library - runtime
ii  libfontenc1                       1:1.0.4-2                       X11 font encoding library
ii  libfreetype6                      2.3.5-1+b1                      FreeType 2 font engine, shared library files
ii  libt1-5                           5.1.1-2                         Type 1 font rasterizer library - runtime
ii  libxfont1                         1:1.3.1-1                       X11 font rasterisation library
ii  libxft2                           2.1.12-2                        FreeType-based font drawing library for X
ii  ttf-dejavu                        2.19-1                          Vera font family derivate with additional characte
ii  ttf-opensymbol                    1:2.3.1-2                       The OpenSymbol TrueType font
ii  xfonts-artwiz                     1:1.3-6                         x11 fonts created by Artwiz, TigerT, and Daniel Er
ii  xfonts-base                       1:1.0.0-5                       standard fonts for X
ii  xfonts-cyrillic                   1:1.0.0-5                       Cyrillic fonts for X
ii  xfonts-encodings                  1:1.0.2-3                       Encodings for X.Org fonts
ii  xfonts-utils                      1:1.0.1-2                       X Window System font utility programs

Comment 1

[Tyler Downer [He/Him]]

Does this still happen with firefox 3.6.6 or later in a fresh profile?

Comment 2

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6.8 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.