Closed Bug 238619 Opened 21 years ago Closed 19 years ago

font-size: 0; Mozilla crashes after showing the title line [@ nsFontMetricsGTK::RealizeFont]

Categories

(Core Graveyard :: GFX: Gtk, defect)

x86
Linux
defect
Not set
critical

Tracking

(Not tracked)

RESOLVED FIXED

People

(Reporter: Joachim.Reichelt, Assigned: ajschult784)

References

()

Details

(Keywords: crash)

Crash Data

Attachments

(3 files)

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; de-AT; rv:1.7b) Gecko/20040316
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; de-AT; rv:1.7b) Gecko/20040316

Cannot access fedora.redhat.com

Reproducible: Always
Steps to Reproduce:
1. go to that url
2.
3.

Actual Results:  
crash of Mozilla

Expected Results:  
show the page :-;

No problem on WIn32!
Maybe the source of problem, that I have SuSE 8.0, gcc version 2.95.3 20010315
(SuSE).
I just tried to dubug it a little bit:

(no debugging symbols found)...
Program received signal SIGFPE, Arithmetic exception.
[Switching to Thread 1024 (LWP 20494)]
0x41095e0d in NSGetModule () from /opt/mozilla-1.7b/components/libgfx_gtk.so
(gdb)
============
other users on my machine can access the page!!
So it seems to be a problem from "left overs" in my .mozilla.
Severity: major → critical
Keywords: crash
Is it an xft build? do you have any *.fon files in your ~/.fonts dir? (bug 180309)
(In reply to comment #2)
> Is it an xft build? do you have any *.fon files in your ~/.fonts dir? (bug 180309)

I do not have gtk2
There is no  ~/.font*
I think it is no xft:
ldd /opt/mozilla/mozilla-bin
        libmozjs.so => not found
        libplds4.so => not found
        libplc4.so => not found
        libnspr4.so => not found
        libpthread.so.0 => /lib/libpthread.so.0 (0x40035000)
        libdl.so.2 => /lib/libdl.so.2 (0x4004b000)
        libgtk-1.2.so.0 => /usr/lib/libgtk-1.2.so.0 (0x4004f000)
        libgdk-1.2.so.0 => /usr/lib/libgdk-1.2.so.0 (0x40202000)
        libgmodule-1.2.so.0 => /usr/lib/libgmodule-1.2.so.0 (0x40244000)
        libglib-1.2.so.0 => /usr/lib/libglib-1.2.so.0 (0x40248000)
        libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x4026c000)
        libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x40274000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x40282000)
        libm.so.6 => /lib/libm.so.6 (0x40342000)
        libc.so.6 => /lib/libc.so.6 (0x40365000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)

This crash is only for ONE USER
There seems to be a problem in the local data:
  removing ~/.mozilla fixes the problem!
How to get the files to remove?
Are these leftover from older installations or plugins?
This bug is triggert by prefs.js:
Add:
user_pref("font.scale.aa_bitmap.always", true);


And this bug ist triggert
worksforme with linux trunk 2004040408, even with the AASB pref set.
Reporter, if bug 239654 and this one only occur under identical circumstances
(except for url) you might want to mark one as duplicate of the other
Keywords: stackwanted
Attached file Here is my GDB output
I was sad on this funny thing. So I downloaded the pages from fedora.redhad.com:
/css/content.css  /css/docbook.css  index.html  /css/layout.css
and changed a little bit the css.
The source of the touble is fixed by:
rh-fedora> diff layout.css*
3a4
>       /* nofont-family: arial; */
100c101
<       font-size: 0;
---
>       font-size: 0.1;

So my system does not like the "font-size: 0;"
Hope this helps a little bit
Joachim, if you could make a single-file testcase that has the minimum amount of
markup with which you crash, and attach that to this bug, that would be helpful
Summary: Mozilla crashes after showing the title line → font-size: 0; Mozilla crashes after showing the title line
Loading this index.html will crash my Mozilla 1.7 final
Product: Browser → Seamonkey
#0  0xb663efd8 in nsFontMetricsGTK::RealizeFont (this=0x877cef0)
    at nsFontMetricsGTK.cpp:1818
#1  0xb663ee82 in nsFontMetricsGTK::Init (this=0x877cef0, aFont=@0x87db9ec, 
    aLangGroup=0x83a2178, aContext=0x851aea8) at nsFontMetricsGTK.cpp:1704
#2  0xb788d076 in nsFontCache::GetMetricsFor ()
    from /build/andrew/gtk1/mozilla/dist/bin/libgkgfx.so

nsFontMetricsGTK.cpp:
1818  mEmAscent = nscoord(mMaxAscent * mEmHeight / lineSpacing);
both mMaxAscent and lineSpacing are 0.
Assignee: general → blizzard
Status: UNCONFIRMED → NEW
Component: General → GFX: Gtk
Ever confirmed: true
Keywords: stackwanted
Product: Mozilla Application Suite → Core
QA Contact: general → ian
Summary: font-size: 0; Mozilla crashes after showing the title line → font-size: 0; Mozilla crashes after showing the title line [@ nsFontMetricsGTK::RealizeFont]
Attached patch patchSplinter Review
this bandaid doesn't give me a warm fuzzy feeling, but does fix the crash and
can't have adverse side-effects.

also, mEmHeight is only non-zero because it's forced to be (line 1806).
Assignee: blizzard → ajschult
Status: NEW → ASSIGNED
Attachment #182305 - Flags: superreview?(dbaron)
Attachment #182305 - Flags: review?(dbaron)
Attachment #182305 - Flags: superreview?(dbaron)
Attachment #182305 - Flags: superreview+
Attachment #182305 - Flags: review?(dbaron)
Attachment #182305 - Flags: review+
Comment on attachment 182305 [details] [diff] [review]
patch

zero risk crash fix
Attachment #182305 - Flags: approval1.8b2?
Comment on attachment 182305 [details] [diff] [review]
patch

a=chofmann
Attachment #182305 - Flags: approval1.8b2? → approval1.8b2+
fixed
Status: ASSIGNED → RESOLVED
Closed: 19 years ago
Resolution: --- → FIXED
Product: Core → Core Graveyard
Crash Signature: [@ nsFontMetricsGTK::RealizeFont]
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