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When trying to build Tor Browser for Windows 64 with the firefox sandbox enabled, firefox fails to build with the following error:

/var/tmp/dist/mingw-w64/helpers/x86_64-w64-mingw32-g++ -std=gnu++11 -mwindows -o file_path.o -c   -DNDEBUG=1 -DTRIMMED=1 -DUNICODE -D_UNICODE -DNS_NO_XPCOM -D_CRT_RAND_S -DCHROMIUM_SANDBOX_BUILD -I/var/tmp/build/firefox-a99a3504e931/security/sandbox -I/var/tmp/build/firefox-a99a3504e931/obj-mingw/security/sandbox -I/var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium-shim -I/var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium -I/var/tmp/build/firefox-a99a3504e931/nsprpub -I/var/tmp/build/firefox-a99a3504e931/obj-mingw/dist/include  -I/var/tmp/build/firefox-a99a3504e931/obj-mingw/dist/include/nspr -I/var/tmp/build/firefox-a99a3504e931/obj-mingw/dist/include/nss         -DMOZILLA_CLIENT -include /var/tmp/build/firefox-a99a3504e931/obj-mingw/mozilla-config.h -MD -MP -MF .deps/file_path.o.pp  -Wall -Wc++11-compat -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings -Wno-invalid-offsetof -Wc++14-compat -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-format -fno-lifetime-dse -fno-exceptions -fno-strict-aliasing -mms-bitfields -fno-rtti -fno-exceptions -fno-math-errno -pipe  -g -O -fomit-frame-pointer    /var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium-shim/base/files/file_path.cpp
In file included from /var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium/base/files/file_path.h:113:0,
                 from /var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium-shim/base/files/file_path.cpp:9:
/var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium/base/containers/hash_tables.h: In member function 'std::size_t base_hash::hash<T*>::operator()(T*) const':
/var/tmp/build/firefox-a99a3504e931/security/sandbox/chromium/base/containers/hash_tables.h:79:43: error: no match for call to '(__gnu_cxx::hash<long long unsigned int>)
 (uintptr_t)'
         reinterpret_cast<uintptr_t>(value));
                                           ^
/var/tmp/build/firefox-a99a3504e931/nsprpub/pr/src/io/prpolevt.c: In function 'PR_NewPollableEvent':
/var/tmp/build/firefox-a99a3504e931/nsprpub/pr/src/io/prpolevt.c:121:14: warning: variable 'rv' set but not used [-Wunused-but-set-variable]
     PRStatus rv;
              ^
make[5]: *** [file_path.o] Error 1
make[5]: Leaving directory `/var/tmp/build/firefox-a99a3504e931/obj-mingw/security/sandbox'
make[4]: *** [security/sandbox/target] Error 2