Running binarycreator fails with
[13] Warning: QFile::at: Cannot set file position 0 [13] Critical: Error occurred while assembling the installer: Read failed after 0 bytes: Unknown error
on my machine. I'm running Qt version 5.11.2.  
 The issue is fixed with the attached patch.
To reproduce simply run
git clone http://code.qt.io/cgit/installer-framework/installer-framework.git/ cd installer-framework/examples qmake && make
- is duplicated by
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QTIFW-1091 binarycreator built with static Qt 5.10.0 doesn't work
-         
     - Closed
 
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QTIFW-1123 ASSERT failure in QFSFileEngine::open
-         
     - Closed
 
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- relates to
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QTIFW-1312 Enable support for Qt 5.12 for 1.1.1 OpenSSL
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 - Closed
 
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