Defailbloat fail!(&'static str)
auto merge of #17529 : nodakai/rust/rustdoc-div-in-h1, r=alexcrichton

W3C HTML5 spec states that H1 must enclose "phrasing content" which
doesn't include DIV.  But SPAN is OK.
http://www.w3.org/TR/html5/sections.html#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
Convert cfg syntax to new system

This removes the ability to use `foo(bar)` style cfgs. Switch them to
`foo_bar` or `foo="bar"` instead.

[breaking-change]
auto merge of #17527 : sfackler/rust/cfg-syntax, r=alexcrichton

We'll need a snapshot before we can convert the codebase over and turn on the deprecation warnings.

cc #17490

This is sitting on top of #17506
auto merge of #17532 : ahmedcharles/rust/typo, r=alexcrichton
Keep ExpnId abstract by providing conversions
Cleanup error messages for anonymous impl for types not declared in the current module

Followup to RFC 57.

Fixes #7607
Fixes #8767
Fixes #12729
Fixes #15060
Correctly populate trait impl map when checking for impl overlaps

Also fix an existing compile-fail test which was intended to cover
this case.

This closes issue #17593
Test for `..` in range patterns
Reject casts to unsized types and suggest use of reference or box

This prevents ICEs or less helpful diagnostics if typeck proceeds
further.  Closes issue #17441
Add regression test for issue #17441
auto merge of #17533 : michaelwoerister/rust/function-call-locs, r=luqmana

This PR makes rustc emit debug locations for *all* call and invoke statements in LLVM IR, if they are contained within a function that debuginfo is enabled for. This is important because LLVM does not handle the case where a function body containing debuginfo is inlined into another function with debuginfo, but the inlined call statement does not have a debug location. In this case, LLVM will not know where (in terms of source code coordinates) the function was inlined to and we end up with some statements still linked to the source locations in there original, non-inlined function without any indication that they are indeed an inline-copy. Later, when generating DWARF from the IR, LLVM will interpret this as corrupt IR and abort.

Unfortunately, the undesirable case described above can still occur when using LTO. If there is a crate compiled without debuginfo calling into a crate compiled with debuginfo, we again end up with the conditions triggering the error. This is why some LTO tests still fail with the dreaded assertion, if the standard library was built with debuginfo enabled. That is, `RUSTFLAGS_STAGE2=-g make rustc-stage2` will succeed but `RUSTFLAGS_STAGE2=-g make check` will still fail after this PR has been merged. I will open a separate issue for this problem.
Register new snapshots
Use the same JSON schema for encoding enums in PrettyEncoder as in Encoder

Closes issue #17607
auto merge of #17321 : apoelstra/rust/error-on-unknown-impl, r=alexcrichton

Followup to RFC 57.

Fixes #7607
Fixes #8767
Fixes #12729
Fixes #15060
auto merge of #17535 : Manishearth/rust/patch-2, r=steveklabnik

It's a rather useful syntax, and non-obvious.

A friend of mine is learning Rust and was trying to find a way to easily do such an initialization — he couldn't find it in the guide and was pretty surprised when I showed him. Looks like something that should be mentioned.

r? @steveklabnik
Fixed quote_method!() implementation

Parser.parse_method now has a second argument, I assume ast::Inherited is the correct visibility in this case.
auto merge of #17409 : farcaller/rust/patch-1, r=huonw

Parser.parse_method now has a second argument, I assume ast::Inherited is the correct visibility in this case.
Update ANTLR float suffix grammar

- Removes f128 from the grammar, which is no longer support in rustc
- The fragment modifier is added so it won't parse float suffix as a separate token
auto merge of #17538 : brson/rust/winmk, r=alexcrichton