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refactor: make sure getting a callback doesn't modify argument
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@@ -5511,7 +5511,7 @@ void get_system_output_as_rettv(typval_T *argvars, typval_T *rettv, bool retlist
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}
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/// Get a callback from "arg". It can be a Funcref or a function name.
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bool callback_from_typval(Callback *const callback, typval_T *const arg)
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bool callback_from_typval(Callback *const callback, const typval_T *const arg)
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FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT
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{
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int r = OK;
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@@ -1845,7 +1845,7 @@ static int nlua_is_thread(lua_State *lstate)
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return 1;
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}
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bool nlua_is_table_from_lua(typval_T *const arg)
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bool nlua_is_table_from_lua(const typval_T *const arg)
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{
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if (arg->v_type == VAR_DICT) {
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return arg->vval.v_dict->lua_table_ref != LUA_NOREF;
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@@ -1856,7 +1856,7 @@ bool nlua_is_table_from_lua(typval_T *const arg)
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}
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}
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char_u *nlua_register_table_as_callable(typval_T *const arg)
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char_u *nlua_register_table_as_callable(const typval_T *const arg)
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{
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LuaRef table_ref = LUA_NOREF;
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if (arg->v_type == VAR_DICT) {
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