tst_qopenglwindows crashes

C:\utils\jom\jom.exe -f Makefile.Release check
(set QT_PLUGIN_PATH=C:\Users\qt\work\qt\qtbase\plugins) & (set PATH=C:\Users\qt\work\qt\qtbase\lib;%%PATH:)=^)%%) & release\tst_qopenglwindow.exe -o c:\Users\qt\work\testresults\tests\auto\gui\kernel\qopenglwindow891315814,xml -o -,txt
********* Start testing of tst_QOpenGLWindow *********
Config: Using QtTest library 5.7.0, Qt 5.7.0 (i386-little_endian-ilp32 shared (dynamic) release build; by MSVC 2013)
PASS : tst_QOpenGLWindow::initTestCase()
stw_init
couldn't open dxtn.dll, software DXTn compression/decompression unavailable
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
wglSwapIntervalEXT: 1
PASS : tst_QOpenGLWindow::create()
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
wglSwapIntervalEXT: 1
PASS : tst_QOpenGLWindow::basic()
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
wglSwapIntervalEXT: 1
PASS : tst_QOpenGLWindow::painter()
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
wglSwapIntervalEXT: 1
PASS : tst_QOpenGLWindow::partial(blit)
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression unavailable
wglSwapIntervalEXT: 1
src/gallium/drivers/softpipe/sp_state_shader.c:194:softpipe_delete_fs_state: Assertion `var != softpipe->fs_variant' failed.
A crash occurred in C:\Users\qt\work\qt\qtbase\tests\auto\gui\kernel\qopenglwindow\release\tst_qopenglwindow.exe.
Function time: 7222ms Total time: 9457ms

Exception address: 0x68CD8780
Exception code : 0x80000003
Nearby symbol : glGetColorTableParameterivEXT

Stack:
# 1: QTest::toString() - 0x6B668E60