On the AMD64 Windows10 2.7 buildbot, the Python compilation fails on mt.exe crashing with error code C0000005 (code -1073741819). It is crashing since the build 279 (Mon Sep 4 2017).

This build was trigged by a single change: the commit 986b7ffc650919b3022ccaa458a843bb8a95d2bd (bpo-30450):

"[2.7] bpo-30450: Pull Windows dependencies from GitHub rather than SVN (GH-1783) (GH-3306)"

mt.exe: "The Mt.exe file is a tool that generates signed files and catalogs. It is available in the Microsoft Windows Software Development Kit (SDK). Mt.exe requires that the file referenced in the manifest be present in the same directory as the manifest."

Error C0000005: "Windows System error (...) Exception Error that occurs when a process (application, driver, etc.) tries to execute a processor command that references memory outside the space allocated to that process by the Operating System."

http://buildbot.python.org/all/builders/AMD64%20Windows10%202.7/builds/279/steps/compile/logs/stdio

(...)
  "D:\buildarea\2.7.bolen-windows10\build\PCbuild\obj\amd64_Debug\pythoncore\symtable.obj"
  "D:\buildarea\2.7.bolen-windows10\build\PCbuild\obj\amd64_Debug\pythoncore\sysmodule.obj"
  "D:\buildarea\2.7.bolen-windows10\build\PCbuild\obj\amd64_Debug\pythoncore\thread.obj"
  "D:\buildarea\2.7.bolen-windows10\build\PCbuild\obj\amd64_Debug\pythoncore\traceback.obj"
  "D:\buildarea\2.7.bolen-windows10\build\PCbuild\obj\amd64_Debug\pythoncore\getbuildinfo.obj"
     Creating library D:\buildarea\2.7.bolen-windows10\build\PCBuild\\amd64\python27_d.lib and object D:\buildarea\2.7.bolen-windows10\build\PCBuild\\amd64\python27_d.exp
  pythoncore.vcxproj -> D:\buildarea\2.7.bolen-windows10\build\PCBuild\\amd64\python27_d.dll
Manifest:
  C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\mt.exe /nologo /verbose /outputresource:"D:\buildarea\2.7.bolen-windows10\build\PCBuild\\amd64\python27_d.dll;#2" /manifest "D:\buildarea\2.7.bolen-windows10\build\PCbuild\obj\amd64_Debug\pythoncore\python27_d.dll.intermediate.manifest"
C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(574,5): error MSB6006: "mt.exe" exited with code -1073741819. [D:\buildarea\2.7.bolen-windows10\build\PCbuild\pythoncore.vcxproj]
Done Building Project "D:\buildarea\2.7.bolen-windows10\build\PCbuild\pythoncore.vcxproj" (Build target(s)) -- FAILED.
The target "BeforeGenerateProjectPriFile" listed in a BeforeTargets attribute at "C:\Program Files (x86)\MSBuild\Microsoft\NuGet\Microsoft.NuGet.targets (186,61)" does not exist in the project, and will be ignored.
The target "BeforeGenerateProjectPriFile" listed in a BeforeTargets attribute at "C:\Program Files (x86)\MSBuild\Microsoft\NuGet\Microsoft.NuGet.targets (186,61)" does not exist in the project, and will be ignored.
Done Building Project "D:\buildarea\2.7.bolen-windows10\build\PCbuild\pcbuild.proj" (Build target(s)) -- FAILED.
(...)