test_dbg complaining about invalid casts

[Stan]

If you run the debug tests on windows you'll get two annoying popups about data loss (which is what the test does). The message states

Run-Time Check Failure #1 - A cast to a smaller data type has caused a
loss of data.  If this was intentional, you should mask the source of
the cast with the appropriate bitmask.  For example:

char c = (i & 0xFF);

There is probably some kind of stuff to write to fix it, and it would be nice to have it. Else you can just press ignore.

Call Stack:

test_dbg.exe!`anonymous namespace'::ArgConverter<int>::visit_any_int<unsigned __int64>(unsigned __int64 value) Line 260	C++
test_dbg.exe!fmt::internal::ArgVisitor<`anonymous namespace'::ArgConverter<int>,void>::visit_ulong_long(unsigned __int64 value) Line 760	C++
test_dbg.exe!fmt::internal::ArgVisitor<`anonymous namespace'::ArgConverter<int>,void>::visit(const fmt::internal::Arg & arg) Line 805	C++
test_dbg.exe!fmt::internal::PrintfFormatter<char>::format(fmt::BasicWriter<char> & writer, fmt::BasicStringRef<char> format, const fmt::ArgList & args) Line 991	C++
test_dbg.exe!fmt::printf<char>(fmt::BasicWriter<char> & w, fmt::BasicStringRef<char> format, const fmt::ArgList & args) Line 1816	C++
test_dbg.exe!fmt::sprintf(fmt::BasicStringRef<char> format, const fmt::ArgList & args) Line 1829	C++
test_dbg.exe!fmt::sprintf<unsigned __int64>(fmt::BasicStringRef<char> arg0, const unsigned __int64 & v0) Line 2067	C++
test_dbg.exe!TestCppformat::test_basic() Line 39	C++
test_dbg.exe!TestDescription_suite_TestCppformat_test_basic::runTest() Line 27	C++
test_dbg.exe!CxxTest::RealTestDescription::run() Line 121	C++
test_dbg.exe!CxxTest::TestRunner::runTest(CxxTest::TestDescription & td) Line 105	C++
test_dbg.exe!CxxTest::TestRunner::runSuite(CxxTest::SuiteDescription & sd) Line 91	C++
test_dbg.exe!CxxTest::TestRunner::runWorld() Line 71	C++
test_dbg.exe!CxxTest::TestRunner::runAllTests(CxxTest::TestListener & listener) Line 42	C++
test_dbg.exe!CxxTest::ErrorFormatter::run() Line 63	C++
test_dbg.exe!CxxTest::Main<CxxTest::ErrorPrinter>(CxxTest::ErrorPrinter & tmp, int argc, char * * argv) Line 148	C++
test_dbg.exe!SDL_main(int argc, char * * argv) Line 21	C++
test_dbg.exe!main_utf8(int argc, char * * argv) Line 126	C
test_dbg.exe!main(int argc, char * * argv) Line 134	C
[External Code]	
[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]

[Sandarac]

This is a duplicate of #3753. Please try to search to check if there are any relevant existing tickets before you create a new one.

[Stan]

Ah right sorry I missed that one.