rustc: check instantiability of fixed length vectors properly. #11661
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Previously, they were treated like ~[] and &[] (which can have length 0), but fixed length vectors are fixed length, i.e. we know at compile time if it's possible to have length zero (which is only for [T, .. 0]). Fixes rust-lang#11659.
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…inger Previously, they were treated like ~[] and &[] (which can have length 0), but fixed length vectors are fixed length, i.e. we know at compile time if it's possible to have length zero (which is only for [T, .. 0]). Fixes #11659.
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Previously, they were treated like ~[] and &[](which can have length
0), but fixed length vectors are fixed length, i.e. we know at compile
time if it's possible to have length zero (which is only for [T, .. 0]).
Fixes #11659.