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internal compiler error: trans_lvalue reached fall-through case #7507

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@DaGenix

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@DaGenix

When compiling the following code:

fn test() -> (u32, u32) {
    return (0, 0);
}

fn main() {
    let mut X0 = 0u32;
    let mut X1 = 0u32;
    (X0, X1) = test();
}

I get the error:

multi-bind-issue.rs:9:4: 9:12 error: internal compiler error: trans_lvalue reached fall-through case: expr_tup(~[@{id: 24, node: expr_path(@{span: {lo: {__field__: 113}, hi: {__field__: 115}, expn_info: None}, global: false, idents: ~[{name: 68, ctxt: 0}], rp: None, types: ~[]}), span: {lo: {__field__: 113}, hi: {__field__: 115}, expn_info: None}}, @{id: 25, node: expr_path(@{span: {lo: {__field__: 117}, hi: {__field__: 119}, expn_info: None}, global: false, idents: ~[{name: 69, ctxt: 0}], rp: None, types: ~[]}), span: {lo: {__field__: 117}, hi: {__field__: 119}, expn_info: None}}])
multi-bind-issue.rs:9     (X0, X1) = test();
                          ^~~~~~~~

Compiled with: 8883099

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