the Deref and DerefMut impls previously always read from the index -1, which would be incorrect if the userdata were stored elsewhere. This adds an index field to UserdataOnStack which is filled in when it is created in lua_read_at_position, so that the value is always read from the correct position. This allows having userdata in function arguments aside from the first, for example.
tomaka
commented
7 years ago
the
DerefandDerefMutimpls previously always read from the index -1, which would be incorrect if the userdata were stored elsewhere. This adds anindexfield toUserdataOnStackwhich is filled in when it is created inlua_read_at_position, so that the value is always read from the correct position. This allows having userdata in function arguments aside from the first, for example.