[Bug 9938] New: Crash downloading gecko

http://bugs.winehq.org/show_bug.cgi?id=9938

Summary: Crash downloading gecko
           Product: Wine
           Version: 0.9.46.
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: wine-net
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Today, with wine from git, gecko install crashed.
I'll attach the backtrace, but the highlights are

Unhandled exception: page fault on read access to 0x00000000 in 32-bit code
(0x00347b6e).
Backtrace:
=>1 0x00347b6e (0x7c92fdc8)
  2 0x7e7fa6e3 InternetReadFile+0x73(hFile=0x3, lpBuffer=0x7c92fed8,
dwNumOfBytesToRead=0x400, pdwNumOfBytesRead=0x7c92fe48)
[wine-git/dlls/wininet/internet.c:1821] in wininet (0x7c92fe08)
  3 0x7ebdb295 HttpProtocol_Read+0x155(iface=<register ESI not in topmost
frame>, pv=0x7c92fed8, cb=0x400, pcbRead=0x7c92fe98)
[wine-git/dlls/urlmon/http.c:770] in urlmon (0x7c92fe58)
  4 0x7ebd54a6 ProtocolStream_Read+0x146(iface=0x7e23c0, pv=0x7c92fed8,
cb=<register ESI not in topmost frame>, pcbRead=0x7c92fed4)
[wine-git/dlls/urlmon/binding.c:337] in urlmon (0x7c92fea8)