problems using freeing allocator

[spoonincode]

Take this contract:

#include <eosio/eosio.hpp>

using namespace eosio;

class [[eosio::contract]] membloat : public contract {
   public:
      using contract::contract;

      [[eosio::action]]
      void nomnomnom() {
         for(size_t i = 0; i < 20000; ++i) {
            char* p = (char*)malloc(100000);
            eosio::check(p, "malloc failed yo");
            free(p);
         }
     } 
};

Compile via

~/cdt/bin/eosio-cpp membloat.cpp -o membloat.o -contract membloat -c
~/cdt/bin/eosio-ld membloat.o -o membloat.wasm -use-freeing-malloc

Expected behavior: runs to completion Observed behavior: access violation