Closed Bug 4800 Opened 25 years ago Closed 25 years ago

Win95-J: Apprunner crashes when loading some CJK pages

Categories

(Core :: Internationalization, defect, P1)

x86
Windows 95
defect

Tracking

()

VERIFIED FIXED

People

(Reporter: teruko, Assigned: erik)

References

()

Details

(Whiteboard: QA BLOCKER:fixed in local tree; need to prepare for check-in)

I tested 4-8-10-99 Win32 build under Winnt4.0J and Windows 95J.

This happens under Windows 95J.

When I go to the Korean page http://home.netscape.com/ko and both Simplified Chinese and Traditional Chinese
page http://home.netscape.com/zh, Apprunner will crash.

Under Winnt 4.0J, it does not crash.
Severity: major → critical
Priority: P3 → P1
Target Milestone: M4
Assignee: ftang → erik
Summary: Apprunner will crash when loading Netscape Korean and Chinese page → Apprunner will crash when loading Korean and Chinese page
I tested these page under Win98J.  Apprunner does not crash.
Summary: Apprunner will crash when loading Korean and Chinese page → Apprunner will crash when loading some CJK page
Under Windows 95J, Apprunner will crash when loading some Japanese pages.
 http://babel/tests/browser/bft/sjis/bft_browser_form_sjis.html
or other HTML test cases under http://babel/tests/browser/html/new_html40/sjis/ directory.
but Apprunner does not crash when loading http://home.netscape.com/ja page.

Under Windows 95US and Windows 95Korean, Apprunner does not crash in Korean and Chinese Netscape
home pages.
Status: NEW → ASSIGNED
Here's one workaround for this problem.

For Japanese display only, you can download the prefs.js file from here:

http://rocknroll/users/momoi/publish/

and have Bitstream Cyberbit font on your system.
You should not modify or comment out the default charset line:

 user_pref("intl.character_set", 260);

Plus of course the font settings. This takes care of the following problems:

1. Proble pages like the follolwing will load without an error and
   displays OK.

   http://home.netscape.com/ja
   http://Kaze:8000/jis.html
   http://kaze:8000/sjis.html
   http://kaze:8000/euc.html

This probably means that Korean and Chinese display will not
work all that well.

2.Windows-native fonts will not let you display Japanese. Bitstream
  font setting in the prefs,js file makes it OK.
OK, I tracked this down. If you call GetTextExtentPoint32W on the character
0xB7 in the Times font on Japanese Windows 95, you crash. It also crashes if
the character is 0xFFFD.

Unbelievable. Any suggestions to workaround this?
I wrote a tiny program to check this, and it does indeed crash on 0xB7, but not
on 0xFFFD. However, Mozilla does crash on 0xFFFD sometimes.

I also tried GetTextExtentPoint32A on 0xB7 on Japanese Windows 95, and it did
not crash.

Sigh. Does this mean that we need to convert from Unicode to the various code
pages before calling the Windows APIs on Windows 95?
Target Milestone: M4 → M5
Summary: Apprunner will crash when loading some CJK page → Win95-J: Apprunner crashes when loading some CJK pages
Status: ASSIGNED → RESOLVED
Closed: 25 years ago
Resolution: --- → FIXED
Status: RESOLVED → REOPENED
This need to be reopened since 4810 is reopened.
Resolution: FIXED → ---
Status: REOPENED → ASSIGNED
Whiteboard: fixed in local tree; need to prepare for check-in
I found the bug, and fixed it in my local tree.
Whiteboard: fixed in local tree; need to prepare for check-in → QA BLOCKER:fixed in local tree; need to prepare for check-in
Putting on QA Blocker List.
Status: ASSIGNED → RESOLVED
Closed: 25 years ago25 years ago
Resolution: --- → FIXED
Status: RESOLVED → VERIFIED
I verified this in Win32 5-03-08 build under Win95J.
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