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auto merge of rust-lang#16452 : epdtry/rust/unreachable-item-ice, r=p…
…cwalton This code produces an ICE: ```rust #![crate_type = "rlib"] fn main() { if true { return } // remaining code is unreachable match () { () => { static MAGIC: uint = 0; } } } ``` ([playpen](http://is.gd/iwOISB)) The error is "encode_symbol: id not found 18", where 18 is the `NodeId` of the declaration of `MAGIC`. The problem is that `rustc` tries to emit metadata for `MAGIC`, but some of the information is missing because `MAGIC` never gets translated by `trans_item` - the entire body of the `match` gets skipped because the `match` itself is unreachable. This branch simplifies the handling of inner items by always processing them using the `trans_item` visitor, instead of sometimes using the visitor and sometimes waiting until `trans_stmt` encounters the item. This fixes the ICE by making the translation of the item no longer depend on the declaration being reachable code. This branch also reverts rust-lang#16059 and rust-lang#16359, since the new change to item translation fixes the same problems as those but is simpler.
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