[Kde-bindings] [bindings] [Bug 340977] New: [qtruby]Qt::WebView crashed due to threading issues (with confirmed fixes in qtbindings)

[margueritesu]

https://bugs.kde.org/show_bug.cgi?id=340977

            Bug ID: 340977
           Summary: [qtruby]Qt::WebView crashed due to threading issues
                    (with confirmed fixes in qtbindings)
           Product: bindings
           Version: unspecified
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kde-bindings at kde.org
          Reporter: i at marguerite.su

Created attachment 89591
  --> https://bugs.kde.org/attachment.cgi?id=89591&action=edit
full error log

Hi,

My ruby version is 2.1.4 and qtruby version 4.14.3. (latest I think)

When I ran a sample script like this:

#!/usr/bin/ruby
require 'Qt'
require 'qtwebkit'

app = Qt::Application.new(ARGV)
web = Qt::WebView.new
web.load Qt::Url.new('http://www.baidu.com/')
web.resize 1024, 640
web.show
app.exec

it crashed randomly (sometimes crash at startup, sometime crash after clicking
one or two links)

The error output is (part of, it's too long for one comment):

/usr/lib64/ruby/site_ruby/2.1.0/Qt/qtruby4.rb:469: [BUG]
vm_call0_cfunc_with_frame: cfp consistency error
ruby 2.1.4p265 (2014-10-27 revision 48166) [x86_64-linux-gnu]

-- Control frame information -----------------------------------------------
c:0005 p:---- s:0015 e:000014 CFUNC  :respond_to_missing?
c:0004 p:---- s:0013 e:000012 CFUNC  :method_missing
c:0003 p:0009 s:0009 e:000008 METHOD
/usr/lib64/ruby/site_ruby/2.1.0/Qt/qtruby4.rb:469
c:0002 p:0097 s:0006 E:0012a8 EVAL   ./test_Webview.rb:10 [FINISH]
c:0001 p:0000 s:0002 E:002408 TOP    [FINISH]

-- Ruby level backtrace information ----------------------------------------
./test_Webview.rb:10:in `<main>'
/usr/lib64/ruby/site_ruby/2.1.0/Qt/qtruby4.rb:469:in `exec'
/usr/lib64/ruby/site_ruby/2.1.0/Qt/qtruby4.rb:469:in `method_missing'
/usr/lib64/ruby/site_ruby/2.1.0/Qt/qtruby4.rb:469:in `respond_to_missing?'

This is the same behaviour as https://github.com/ryanmelt/qtbindings/issues/51
describes.

Its comments indicates that this is a threading issue and qtbindings after
4.8.5.1 (it follows Qt version) doesn't have this problem.

I think these commits might help:

https://github.com/ryanmelt/qtbindings/commit/ffb3c6a664ba9cfb30e7f5fd1cbcb63212880d1a#diff-8

https://github.com/ryanmelt/qtbindings/commit/40deaa0cb3cfe99b43eca2c52cfc2a0c9aa63f2f

But they mixed stuff in one commits, so I'm not able to tell which codes
resolved the issue or even provide a patch.

Can you please take a look at this and port this into qtruby? (the fix exists
for 11 months, so I think it's pretty stable)

Thanks

Marguerite

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