rustc: When encountering "mutable" as a tycon, parse it, drop it on the floor, and emit a warning
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@ -40,6 +40,14 @@ obj session(cfg targ) {
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fail;
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}
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fn span_warn(span sp, str msg) {
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log #fmt("%s:%u:%u:%u:%u: warning: %s",
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sp.filename,
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sp.lo.line, sp.lo.col,
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sp.hi.line, sp.hi.col,
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msg);
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}
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fn bug(str msg) {
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log #fmt("error: internal compiler error %s", msg);
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fail;
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@ -452,6 +452,15 @@ impure fn parse_ty(parser p) -> @ast.ty {
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t = ast.ty_path(parse_path(p, GREEDY), none[ast.def]);
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}
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case (token.MUTABLE) {
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p.bump();
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p.get_session().span_warn(p.get_span(),
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"ignoring deprecated 'mutable' type constructor");
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auto typ = parse_ty(p);
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t = typ.node;
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hi = typ.span;
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}
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case (_) {
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p.err("expecting type");
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t = ast.ty_nil;
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