Cannot build qt5-webkit with debug

[Michael Osipov]

Am 2020-02-24 um 22:52 schrieb Miroslav Lachman:
> Michael Osipov wrote on 2020/02/24 21:40:
>> Am 2020-02-24 um 20:56 schrieb Miroslav Lachman:
>
> [..]
>
>>> I tried it on simpler website on HTTP without external fonts etc. but
>>> it is still crashing
>>>
>>>
>>> Example JS code and truss output is on hastebin
>>> https://hastebin.com/sizefupiki.pl
>>>
>>> No fopen found there :(
>>
>> Can you also please provide the backtrace from lldb for this core dump?
>
> lldb backtrace
> https://hastebin.com/ovufejevil.bash
>
>> Surprisingly, the last call is:
>>> stat("/usr/local/share/icu/65.1/icudt65l/iso-8859_16-2001.cnv",0x7fffffffc998)
>>>
>>
>> which comes from ICU. The entire website has been read from the
>> socket, as you can see from the read in 2246.
>> Maybe it to convert the "charset=iso-8859-2" to LC_ALL value.
>>
>> I would recommend to have a simple server built in PHP or Python and
>> try the simplest site possible w/o CSS and then add one w/o fonts first.
>
> I tried it on the simplest web page without any fonts, css etc. but it
> is still crashing. I removed the charset from the page so it is now not
> using ICU.
>
> https://hastebin.com/iyonapasuz.bash
>
> Let me know if I can try anything else.

OK, it is getting closer.

The crash comes from this call:
https://github.com/qtwebkit/qtwebkit/blob/qtwebkit-5.212.0-alpha3/Source/WebCore/css/CSSParser.cpp#L6907

Can you commet comment this line, recompile qtwebkit and see what happens?

Either this line:
https://github.com/qtwebkit/qtwebkit/blob/qtwebkit-5.212.0-alpha3/Source/WebCore/css/CSSParser.cpp#L6897
does not work properly or this is broken:
https://github.com/qtwebkit/qtwebkit/blob/qtwebkit-5.212.0-alpha3/Source/WebCore/css/CSSValuePool.cpp#L121-L134

I'd like to see to see the content of familyName when passed. Either via
breakpoint or with std::cout. Unfortunately, my C++ knowledge is
minimal. I recommend to write a minimal C++ app with a function call and
signature "const String& str" and then pass the string [1]. Since this
is a custom type, I don't know whether cout will work. You have to try.

Michael


[1]
https://github.com/adobe/webkit/blob/master/Source/WTF/wtf/text/WTFString.h