There is an issue with the SConstruct script in SVN when building the mingw target on windows. The temp directory does not get correctly setup resulting in the following cryptic error:
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
scons: *** [buildscons\mingw\src\jsontestrunner\main.o] Error 3
scons: building terminated because of errors.
This can be corrected with by adding "'TEMP' : os.environ['TEMP']" to the Environment() call. Attached is the a new build script with this fix applied.