Fix `Vec::map_in_place` not doing what is written in the comment
Fix for issue #17574
Look for standard crates in LIBDIR provided by --libdir option,
not in hardcoded libdir path. If there was no LIBDIR provided
during configuration fallback to hardcoded paths.

Thanks to Jan Niklas Hasse for solution and to Alex Crichton for improvements.

Closes #11671
Conformed the 100 char limit and changed colon to semicolon
Move closure checking into its own file. Shrink check/mod.rs!
Deduce the argument types based on the expected type, trawling through the fulfillment contect if necessary.
doc: clarifying unsafe code vs undefined behavior
Merge the ExprFnBlock and ExprUnboxedClosure into one ExprClosure with an optional unboxed closure kind.
Use the expected type to decide whether `||` is an unboxed or boxed closure.
auto merge of #19105 : alfie/rust/master, r=thestinger

As discussed in pull #19068, trying to make the wording more clear for unsafe code vs undefined behavior.
libcore: DST-ify AsSlice

This commit changes `AsSlice` to work on unsized types, and changes the
`impl` for `&[T]` to `[T]`. Aside from making the trait more general,
this also helps some ongoing work with method resolution changes.

This is a breaking change: code that uses generics bounded by `AsSlice`
will have to change. In particular, such code previously often took
arguments of type `V` where `V: AsSlice<T>` by value. These should now
be taken by reference:

```rust
fn foo<Sized? V: AsSlice<T>>(v: &V) { .. }
```

A few std lib functions have been changed accordingly.

[breaking-change]
libcore: DSTify ops traits, Equiv

This commit relaxes constraints on generics and traits within the
`core::ops` module and for the `Equiv` trait.
Rename `col!` to `column!`.

This macro is very rarely used, so there is no need (and it is better)
for it to avoid the abbreviation.

Closes rust-lang/rfcs#467.

[breaking-change]
auto merge of #18638 : aturon/rust/as_slice_dst, r=japaric

This PR changes `AsSlice` to work on unsized types, and changes the
`impl` for `&[T]` to `[T]`. Aside from making the trait more general,
this also helps some ongoing work with method resolution changes.

This is a breaking change: code that uses generics bounded by `AsSlice`
will have to change. In particular, such code previously often took
arguments of type `V` where `V: AsSlice<T>` by value. These should now
be taken by reference:

```rust
fn foo<Sized? V: AsSlice<T>>(v: &V) { .. }
```

A few std lib functions have been changed accordingly.

The PR also relaxes constraints on generics and traits within the
`core::ops` module and for the `Equiv` trait.

[breaking-change]

r? @nikomatsakis 
cc @japaric
auto merge of #19113 : nikomatsakis/rust/unboxed-boxed-closure-unification, r=acrichto

Use the expected type to infer the argument/return types of unboxed closures. Also, in `||` expressions, use the expected type to decide if the result should be a boxed or unboxed closure (and if an unboxed closure, what kind).

This supercedes PR #19089, which was already reviewed by @pcwalton.
Refactored new CodeExtent type for improved abstraction.

(Previously, statically identifiable scopes/regions were solely
identified with NodeId's; this refactoring prepares for a future
where that 1:1 correspondence does not hold.)
auto merge of #19033 : pnkfelix/rust/fsk-introduce-scopedata-via-refactor, r=nikomatsakis

(Previously, scopes were solely identified with NodeId's; this
refactoring prepares for a future where that does not hold.)

Ground work for a proper fix to #8861.
Require that objects can only be made from Sized types. Fixes #18333.
auto merge of #19071 : huonw/rust/col2column, r=nikomatsakis

This macro is very rarely used, so there is no need (and it is better)
for it to avoid the abbreviation.

Closes rust-lang/rfcs#467.
Rename remaining Failures to Panic