diff --git a/src/cs_gen.cc b/src/cs_gen.cc
index 3cc3a91..f681492 100644
--- a/src/cs_gen.cc
+++ b/src/cs_gen.cc
@@ -326,6 +326,16 @@ void gen_state::gen_local(std::uint32_t nargs) {
     code.push_back(BC_INST_LOCAL | (nargs << 8));
 }
 
+void gen_state::gen_main(std::string_view v, std::string_view src) {
+    parser_state ps{ts, *this};
+    ps.source = v.data();
+    ps.send = v.data() + v.size();
+    ps.src_name = src;
+    code.push_back(BC_INST_START);
+    ps.parse_block(VAL_ANY);
+    code.push_back(BC_INST_EXIT);
+}
+
 void gen_state::gen_main_null() {
     code.reserve(code.size() + 4);
     code.push_back(BC_INST_START);
diff --git a/src/cs_gen.hh b/src/cs_gen.hh
index 9636b48..ccd6565 100644
--- a/src/cs_gen.hh
+++ b/src/cs_gen.hh
@@ -75,6 +75,9 @@ struct gen_state {
 
     void gen_local(std::uint32_t nargs);
 
+    void gen_main(
+        std::string_view s, std::string_view src = std::string_view{}
+    );
     void gen_main_null();
     void gen_main_integer(integer_type v);
     void gen_main_float(float_type v);
diff --git a/src/cs_parser.cc b/src/cs_parser.cc
index f3a31db..35f9230 100644
--- a/src/cs_parser.cc
+++ b/src/cs_parser.cc
@@ -1483,15 +1483,6 @@ endstatement:
     }
 }
 
-void parser_state::gen_main(std::string_view s, int ret_type) {
-    source = s.data();
-    send = s.data() + s.size();
-    gs.code.reserve(gs.code.size() + 8);
-    gs.code.push_back(BC_INST_START);
-    parse_block(VAL_ANY);
-    gs.code.push_back(BC_INST_EXIT | ((ret_type < VAL_ANY) ? (ret_type << BC_INST_RET) : 0));
-}
-
 /* list parser public implementation */
 
 LIBCUBESCRIPT_EXPORT bool list_parser::parse() {
diff --git a/src/cs_parser.hh b/src/cs_parser.hh
index 578afde..0583299 100644
--- a/src/cs_parser.hh
+++ b/src/cs_parser.hh
@@ -51,7 +51,6 @@ struct parser_state {
     std::string_view get_word();
 
     void parse_block(int ret_type, int term = '\0');
-    void gen_main(std::string_view s, int ret_type = VAL_ANY);
 
     void next_char() {
         if (source == send) {
diff --git a/src/cs_state.cc b/src/cs_state.cc
index 295afb8..310c094 100644
--- a/src/cs_state.cc
+++ b/src/cs_state.cc
@@ -656,11 +656,7 @@ static any_value do_run(
 ) {
     any_value ret{*ts.pstate};
     gen_state gs{ts};
-    {
-        parser_state ps{ts, gs};
-        ps.src_name = file;
-        ps.gen_main(code, VAL_ANY);
-    }
+    gs.gen_main(code, file);
     auto cref = gs.steal_ref();
     bcode *p = cref;
     vm_exec(ts, p->get_raw(), ret);
diff --git a/src/cs_val.cc b/src/cs_val.cc
index 5d2de16..15963c6 100644
--- a/src/cs_val.cc
+++ b/src/cs_val.cc
@@ -270,7 +270,7 @@ bcode_ref any_value::force_code(state &cs) {
             break;
     }
     gen_state gs{state_p{cs}.ts()};
-    parser_state{state_p{cs}.ts(), gs}.gen_main(get_string());
+    gs.gen_main(get_string());
     auto bc = gs.steal_ref();
     set_code(bc);
     return bc;
diff --git a/src/cs_vm.cc b/src/cs_vm.cc
index 5b3f3c5..b8ebb09 100644
--- a/src/cs_vm.cc
+++ b/src/cs_vm.cc
@@ -240,7 +240,7 @@ bool exec_alias(
     ts.callstack = &aliaslink;
     if (!aast.node->code) {
         gen_state gs{ts};
-        parser_state{ts, gs}.gen_main(aast.node->val_s.get_string());
+        gs.gen_main(aast.node->val_s.get_string());
         aast.node->code = gs.steal_ref();
     }
     bcode_ref coderef = aast.node->code;
@@ -692,7 +692,7 @@ std::uint32_t *vm_exec(
                         gs.gen_main_float(arg.get_float());
                         break;
                     case value_type::STRING:
-                        parser_state{ts, gs}.gen_main(arg.get_string());
+                        gs.gen_main(arg.get_string());
                         break;
                     default:
                         gs.gen_main_null();
@@ -709,7 +709,7 @@ std::uint32_t *vm_exec(
                         std::string_view s = arg.get_string();
                         if (!s.empty()) {
                             gen_state gs{ts};
-                            parser_state{ts, gs}.gen_main(s);
+                            gs.gen_main(s);
                             arg.set_code(gs.steal_ref());
                         } else {
                             arg.force_none();