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Build 32 bit runs, build 64 bit compiles but crashes at the beginning.

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Hi. I have two simple applications. If compiled with the official 32 bit release ( Qt 5.4, mingw 4.9.1) they do run as expected. Yesterday I downloaded: http://sourceforge.net/projects/qtx64/files/qt-creator-x64/3.3.0/qt-creator-3.3.0-x64.exe/download http://sourceforge.net/projects/mingw-w64/files/Toolchains targetting Win64/Personal Builds/mingw-builds/4.9.2/threads-win32/seh/x86_64-4.9.2-release-win32-seh-rt_v3-rev1.7z/download and http://sourceforge.net/projects/qtx64/files/qt-x64/5.4.0/mingw-4.9/seh/qt-5.4.0-x64-mingw492r0-seh-compact.exe/download Yes, my both applications can be compiled in 64 bit mode but they crush right at the start even if started within QtCreator. Any hints? Try a different version of mingw-4.9? That with SJLJ? “A new GDB package for the TDM64 edition has been released, fixing an undesired libiconv-2.dll linkage that was causing 0×7b errors and adding python27.dll which was mistakenly omitted.”? Maybe, this?

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