test fix

libredex/StlUtil.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <algorithm>
+#include <cstring>
 #include <deque>
 #include <vector>
 
@@ -45,9 +46,15 @@ size_t erase_if(Container& c, const Pred& pred) {
   return removed;
 }
 
-template <typename To, typename From>
-constexpr To bit_cast(const From& from) noexcept {
-  return __builtin_bit_cast(To, from);
+template <class To, class From>
+constexpr To bit_cast(const From& src) noexcept {
+  static_assert(std::is_trivially_constructible_v<To>,
+                "This implementation additionally requires "
+                "destination type to be trivially constructible");
+
+  To dst;
+  std::memcpy(&dst, &src, sizeof(To));
+  return dst;
 }
 
 } // namespace std20