Incompatibilities in the API

• The function lua_call no longer has the parameter nparam.
• The function lua_pop is no longer available, since it could lead to strange behavior. In particular, to access results returned from a Lua function, the new macro lua_getresult should be used.
• The old functions lua_storefield and lua_storeindexed have been replaced by

  int lua_storesubscript (void);

  with the parameters explicitly pushed on the stack.
• The functionality of the function lua_errorfunction has been replaced by the fallback mechanism; see Section 4.8.
• When calling a function from the Lua library, parameters passed through the stack must be pushed just before the correspondent call, with no intermediate calls to Lua. Special care should be taken with macros like lua_getindexed and lua_getfield.

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