Rewrite fmt::throw_exception destructor

Add _DEBUG in debug mode for consistency with MSVC.

CMakeLists.txt

@@ -36,6 +36,8 @@ endif()
 
 if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
 	add_definitions(-DNDEBUG)
+elseif(NOT MSVC)
+	add_definitions(-D_DEBUG)
 endif()
 
 if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)

Utilities/StrFmt.h

@@ -297,7 +297,18 @@ namespace fmt
 			raw_throw_exception({line, col, file, func}, reinterpret_cast<const char*>(fmt), type_list, fmt_args_t<Args...>{fmt_unveil<Args>::get(args)...});
 		}
 
-		[[noreturn]] ~throw_exception() { std::abort(); } // Unreachable
+#ifdef _DEBUG
+		[[noreturn]] ~throw_exception()
+		{
+#ifdef _MSC_VER
+			__assume(false);
+#else
+			__builtin_unreachable();
+#endif
+		}
+#else
+		[[noreturn]] ~throw_exception();
+#endif
 	};
 
 	template <typename CharT, usz N, typename... Args>