diff --git a/build.ninja b/build.ninja
index 747bcc33..984b2897 100644
--- a/build.ninja
+++ b/build.ninja
@@ -4,9 +4,11 @@ ninja_required_version = 1.3
 builddir = bin
 objdir = obj
 cxx = g++
+cxxflagsd = -std=c++11 -pedantic -pedantic-errors -g -Wextra -Wall -O0 -DEBUG
 cxxflags = -std=c++11 -pedantic -pedantic-errors -Wextra -Wall -O2 -DNDEBUG
 incflags = -I"." -I"./include" -I"." -I"/usr/include/lua5.2" -I"./lua-5.2.2/src/" -I"./Catch/include/"
 linkflags = -static -L"./lib" -llua5.2 -ldl
+linkflags_win = -static -L"./lib" -llua5.2
 
 rule compile
     command = $cxx -MMD -MF $out.d $cxxflags -c $in -o $out $incflags
@@ -14,14 +16,33 @@ rule compile
     depfile = $out.d
     description = Compiling $in
 
+rule compiled
+    command = $cxx -MMD -MF $out.d $cxxflagsd -c $in -o $out $incflags
+    deps = gcc
+    depfile = $out.d
+    description = Compiling $in
+
 rule link
     command = $cxx $in -o $out $linkflags
     description = Creating $out
 
+rule link_win
+    command = $cxx $in -o $out $linkflags_win
+    description = Creating $out
+
 build $objdir/tests.o: compile tests.cpp
+build $objdir/debug/tests.o: compiled tests.cpp
+build $objdir/win/tests.o: compile tests.cpp
+build $objdir/win/debug/tests.o: compiled tests.cpp
 
 build $builddir/tests: link $objdir/tests.o
+build $builddir/debug/tests: link $objdir/debug/tests.o
+build $builddir/win/tests: link_win $objdir/win/tests.o
+build $builddir/win/debug/tests: link_win $objdir/win/debug/tests.o
 
 build install: phony $builddir/tests
+build install_debug: phony $builddir/debug/tests
+build install_win: phony $builddir/win/tests
+build install_win_debug: phony $builddir/win/debug/tests
 
 default install
diff --git a/sol/function.hpp b/sol/function.hpp
index 228f7734..a3affe0a 100644
--- a/sol/function.hpp
+++ b/sol/function.hpp
@@ -108,7 +108,7 @@ inline std::function<Signature> get_std_func(types<FxArgs...> t, types<>, lua_St
 }
 
 template <typename Signature>
-inline std::function<Signature> get(types<std::function<Signature>>, lua_State* L, int index = -1) {
+inline std::function<Signature> get(types<std::function<Signature>>, lua_State* L, int index) {
     typedef function_traits<Signature> fx_t;
     typedef typename fx_t::args_type args_t;
     typedef typename tuple_types<typename fx_t::return_type>::type ret_t;
diff --git a/sol/stack.hpp b/sol/stack.hpp
index 4d004e00..b6d14f3f 100644
--- a/sol/stack.hpp
+++ b/sol/stack.hpp
@@ -29,6 +29,7 @@
 #include <utility>
 #include <array>
 #include <cstring>
+#include <functional>
 
 namespace sol {
 namespace stack {
@@ -78,6 +79,9 @@ inline auto get(types<T> t, lua_State* L, int index = -1) -> decltype(get_sol_ty
     return get_sol_type(std::is_base_of<sol::reference, U>(), t, L, index);
 }
 
+template <typename Signature>
+inline std::function<Signature> get(types<std::function<Signature>>, lua_State* L, int index = -1);
+
 template<typename T>
 inline T get_unsigned(std::true_type, lua_State* L, int index = -1) {
     return lua_tounsigned(L, index);
diff --git a/tests.cpp b/tests.cpp
index f415721e..11bc1af1 100644
--- a/tests.cpp
+++ b/tests.cpp
@@ -8,7 +8,8 @@ void test_free_func(std::function<void()> f) {
 
 void test_free_func2(std::function<int(int)> f, int arg1) {
     int val = f(arg1);
-    assert(arg1 == val);
+    if(val != arg1)
+        throw sol::error("failed function call!");
 }
 
 std::string free_function() {
@@ -30,8 +31,10 @@ struct self_test {
 
     void f(const self_test& t) {
         std::cout << "got test" << '\n';
-        assert(t.bark == bark);
-        assert(&t == this);
+        if (t.bark != bark)
+            throw sol::error("bark values are not the same for self_test f function");
+        if (&t != this)
+            throw sol::error("call does not reference self for self_test f function");
     }
 };