A glimpse of sanity

  LLVM-MinGW is a toolchain built with Clang, LLD, libc++, targeting
  i686, x86_64, arm and aarch64 (ARM64) running on Windows.

  They say it supports Address Sanitizer und Undefined Behaviour
  Sanitizer.

  Whenever I add "-fsanitize=address" or "-fsanitize=undefined"
  on Windows, the executables will run, but not do anything,
  just return immediately. Neither is normal output printed nor
  are diagnostics when trying to trigger the sanitizers. Without
  those options, the programs will run fine.

  It tried adding "-lclang_rt.asan-x86_64", but then it complains
  about duplicate symbols, so I guess that this is not needed.

  I also made sure the directory containing
  "libclang_rt.asan_dynamic-x86_64.dll" is in the PATH.

  So, I can't get the sanitizers to work here! I'll just try
  downloading another version in a few months . . .