> -----Original Message----- > From: Kai Tietz [mailto:ktiet...@googlemail.com] > Sent: Thursday, August 29, 2013 3:13 PM > To: mingw-w64-public@lists.sourceforge.net > Subject: Re: [Mingw-w64-public] Javascript switch statement misbehavior in > QtWebkit - gcc 4.8 32 bit optimization bug ? > > Hi Kai, > > 2013/8/29 Koehne Kai <kai.koe...@digia.com>: > > Hi, > > > > We've been dealing with a strange bug report in Qt Webkit: A javascript > 'switch' statement that does fail to work correctly, but only in the mingw > packages. > > > > https://bugreports.qt-project.org/browse/QTBUG-31988 > > > > Apparently it only affects gcc 4.8.x , 32 bit, release builds. It's also no > > 'new' > code, which led us to believe it might indeed be a gcc compiler optimization > bug. > > > > I know it's not much information, but isolating a small demo application out > of the monster that is qtwebkit is challenging, so ... maybe this rings a > bell for > someone? Are you aware of optimization bugs in gcc 4.8 that might explain > the error? > > > > Thanks > > > > Kai > > What gcc 4.8 version was used here?
I tried with several versions (gcc 4.8.0, gcc 4.8.1), all from mingw-builds. > I know that within 4.8.1 (and later on > 4.8.x - branch), some fixes were done for C++ and throw-code. > Nevertheless the issue here is for sure not directly mingw-w64 related. It > seems to be more a general g++ issue (and should be reproducable on other > targets too). Good point! I tried now with a gcc 4.8.1 installed on Ubuntu 32 bit, but I couldn't see the error there. Well, at least the example program did work, which might however be just luck ... Thanks for the idea, anyway. Kai ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ Mingw-w64-public mailing list Mingw-w64-public@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
