Convert mutable statics error to have error code and add explanation.
Also changes 'owned pointers' => 'boxes' in the error message.
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@ -880,6 +880,19 @@ From [RFC 246]:
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> required that all references be borrowed.
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[RFC 246]: https://github.com/rust-lang/rfcs/pull/246
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"##,
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E0397: r##"
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It is not allowed for a mutable static to allocate or have destructors. For
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example:
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```
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// error: mutable statics are not allowed to have boxes
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static mut FOO: Option<Box<usize>> = None;
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// error: mutable statics are not allowed to have destructors
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static mut BAR: Option<Vec<i32>> = None;
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```
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"##
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}
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@ -249,13 +249,13 @@ impl<'a, 'tcx> CheckCrateVisitor<'a, 'tcx> {
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let suffix = if tcontents.has_dtor() {
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"destructors"
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} else if tcontents.owns_owned() {
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"owned pointers"
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"boxes"
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} else {
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return
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};
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self.tcx.sess.span_err(e.span, &format!("mutable statics are not allowed \
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to have {}", suffix));
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span_err!(self.tcx.sess, e.span, E0397,
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"mutable statics are not allowed to have {}", suffix);
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}
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fn check_static_type(&self, e: &ast::Expr) {
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@ -12,6 +12,6 @@
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static mut a: Box<isize> = box 3;
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//~^ ERROR allocations are not allowed in statics
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//~^^ ERROR mutable statics are not allowed to have owned pointers
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//~^^ ERROR mutable statics are not allowed to have boxes
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fn main() {}
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