[NEEDS INFO] Alt+Tab causing crash in water reflections rendering with Intel G45

[historic_bruno]

Reported by alpha123 on ​IRC. It looks related to fancy water rendering, possibly an Intel driver bug. It did not occur in Alpha 11. Only occurs sporadically now, after the game has been running for a while.

Unhandled exception at 0x05308982 in pyrogenesis.exe: 0xC0000005: Access violation reading location 0x0000000c

            ig4icd32.dll!05308982()        
            [Frames below may be incorrect and/or missing, no symbols loaded for ig4icd32.dll]     
            ig4icd32.dll!05308ce2()        
            ig4icd32.dll!052f66c4()        
            ig4icd32.dll!04e011da()        
            ig4icd32.dll!052f81dc()        
            ig4icd32.dll!052f81f7()        
            ig4icd32.dll!04e027be()        
    >       pyrogenesis.exe!CRenderer::RenderReflections(const CShaderDefines & context, const CBoundingBoxAligned & scissor)  Line 1198 + 0x22 bytes       C++
            pyrogenesis.exe!CRenderer::RenderSubmissions()  Line 1483       C++
            pyrogenesis.exe!CRenderer::RenderScene(Scene & scene)  Line 1776        C++
            pyrogenesis.exe!CGameView::Render()  Line 503 + 0x3c bytes      C++
            pyrogenesis.exe!Render()  Line 227      C++
            pyrogenesis.exe!Frame()  Line 395       C++
            pyrogenesis.exe!RunGameOrAtlas(int argc, const char * * argv)  Line 507 + 0x5 bytes     C++
            pyrogenesis.exe!main(int argc, char * * argv)  Line 550 + 0xf bytes     C++
            pyrogenesis.exe!wmain(int argc, wchar_t * * argv)  Line 380 + 0xb bytes C++
            pyrogenesis.exe!__tmainCRTStartup()  Line 583 + 0x17 bytes      C
            pyrogenesis.exe!CallStartupWithinTryBlock()  Line 397   C++
            kernel32.dll!75773677()        
            ntdll.dll!77749f42()    
            ntdll.dll!77749f15()

[wraitii]

Might be cause by some changes I did in RenderReflections(). I'll have to check.

[leper]

r13013 maybe references this.

[leper]

Replying to wraitii:

Might be cause by some changes I did in RenderReflections(). I'll have to check.

After r12013 some of the variables used, can be uninitialized (dirty.{x1,x2,y1,y2}).

[historic_bruno]

Does this still occur?

[alpha123]

Replying to historic_bruno:

Does this still occur?

I haven't encountered it for a while, however I do not usually Alt-Tab out of the game anymore, largely because of this. :P