Issue 11913 borrow in aliasable loc #12117
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…ble-loc, r=pcwalton Repair a rather embarassingly obvious hole that I created as part of #9629. In particular, prevent `&mut` borrows of data in an aliasable location. This used to be prevented through the restrictions mechanism, but in #9629 I modified those rules incorrectly. r? @pcwalton Fixes #11913
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minor: Insert whitespace after const token when formatting macro expansions
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Repair a rather embarassingly obvious hole that I created as part of #9629. In particular, prevent
&mutborrows of data in an aliasable location. This used to be prevented through the restrictions mechanism, but in #9629 I modified those rules incorrectly.r? @pcwalton
Fixes #11913