diff --git a/src/stdlib.cpp b/src/stdlib.cpp
index 0eceffc..4b9a95e 100644
--- a/src/stdlib.cpp
+++ b/src/stdlib.cpp
@@ -20,24 +20,32 @@ Result<StackFrame> stdlib_unknown(const StackFrame& stack) {
 Result<StackFrame> stdlib_print(const StackFrame& stack) {
   auto params = TRY(stack.get(0));
   auto size = TRY(params.size());
+
+  String str = TRY(String::create(""));
+
   for (uint64_t i = 0; i < size; i++) {
     Value param = TRY(params.get(i));
 
     if (i != 0) {
-      std::cout << " ";
+      str = TRY(str.concat(" "));
     }
     if (param.is<String>()) {
-      TRY(print_string(*param.to<String>()));
+      str = TRY(str.concat(*param.to<String>()));
     } else {
       auto s = TRY(write_one(param));
-      TRY(print_string(s));
+      str = TRY(str.concat(s));
     }
   }
 
+  TRY(print_string(str));
+
   auto nil = Value(TRY(Nil::create()));
   auto res = TRY(stack.set(0, nil));
 
-  return res.ret(0);
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_println(const StackFrame& stack) {
@@ -64,7 +72,10 @@ Result<StackFrame> stdlib_assert(const StackFrame& stack) {
   auto nil = Value(TRY(Nil::create()));
   auto res = TRY(stack.set(0, nil));
 
-  return res.ret(0);
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_dict(const StackFrame& stack) {
@@ -73,7 +84,11 @@ Result<StackFrame> stdlib_dict(const StackFrame& stack) {
   Value d = TRY(Dict::create(*params.to<Array>()));
 
   auto res = TRY(stack.set(0, d));
-  return res.ret(0);
+
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_list(const StackFrame& stack) {
@@ -82,14 +97,22 @@ Result<StackFrame> stdlib_list(const StackFrame& stack) {
   Value d = TRY(Pair::create(*params.to<Array>()));
 
   auto res = TRY(stack.set(0, d));
-  return res.ret(0);
+
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_array(const StackFrame& stack) {
   auto params = TRY(stack.get(0));
 
   auto res = TRY(stack.set(0, params));
-  return res.ret(0);
+
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_get(const StackFrame& stack) {
@@ -103,7 +126,11 @@ Result<StackFrame> stdlib_get(const StackFrame& stack) {
   auto val = TRY(collection.get(key));
 
   auto res = TRY(stack.set(0, val));
-  return res.ret(0);
+
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_srcloc(const StackFrame& stack) {
@@ -143,7 +170,11 @@ Result<StackFrame> stdlib_srcloc(const StackFrame& stack) {
   auto val = Value(TRY(SrcLoc::create(sr)));
 
   auto res = TRY(stack.set(0, val));
-  return res.ret(0);
+
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_size(const StackFrame& stack) {
@@ -158,7 +189,11 @@ Result<StackFrame> stdlib_size(const StackFrame& stack) {
   auto val = Value(TRY(Int64::create((int64_t)psize)));
 
   auto res = TRY(stack.set(0, val));
-  return res.ret(0);
+
+  res = TRY(res.ret(0));
+  res = TRY(res.incpc());
+
+  return res;
 }
 
 Result<StackFrame> stdlib_map(const StackFrame& stack_param) {