…ustc source.

On my system, when the processor is already loaded, and I try to
run the test suite, e.g. compile-fail/dep-graph-assoc-type-trans.rs
fails because of undecodable JSON.

Running the compiler manually, I can see that the dep graph thread
panics (and puts non-JSON on stderr) while `send`ing on `swap_out`,
presumably because the other end has already quit.  I think that in
this case, we can just gracefully exit the thread.

Also move the "Thread type" section down a bit, since it is
not so important anymore.

Fixes: rust-lang#33321

The changed line makes it look like `unsafe` is allowed, but the
first statement of `parse_item_foreign_fn` is:

`self.expect_keyword(keywords::Fn)?;`

So we get the strange "expected one of `fn`, `pub`, `static`, or
`unsafe`, found `unsafe`".

Fixes: rust-lang#27361

For example, `Vec::len` is both a field and a method, and usually
encountering `vec.len` just means that the parens were forgotten.

Fixes: rust-lang#26472

We will no longer use `ccache` in the makefiles for our local dependencies like
miniz, but they're so small anyway it doesn't really matter.

Closes rust-lang#33285

The definition of this value recently changed slightly. It no
longer corresponds directly to the target triple.

Also shuffled things around to make the order of cfg descriptions more
logical and added text related them to the target triple.

cc rust-lang#33403

…les, r=nikomatsakis

Add `TAGS.rustc.emacs`/`TAGS.rustc.vi` make targets

Add `TAGS.rustc.emacs`/`TAGS.rustc.vi` make targets, (re-)including rustc source.

…klabnik

Add process types documentation

Part of rust-lang#29370.

r? @steveklabnik

…tsakis

dep_graph: avoid panicking in thread when channel closed

On my system, when the processor is already loaded, and I try to
run the test suite, e.g. compile-fail/dep-graph-assoc-type-trans.rs
fails because of undecodable JSON.

Running the compiler manually, I can see that the dep graph thread
panics (and puts non-JSON on stderr) while `send`ing on `swap_out`,
presumably because the other end has already quit.  I think that in
this case, we can just gracefully exit the thread.

…nkfelix

mk: Fix building with --enable-ccache

We will no longer use `ccache` in the makefiles for our local dependencies like
miniz, but they're so small anyway it doesn't really matter.

Closes rust-lang#33285

…Gomez

std::thread docs: spawn() does not return a Thread anymore

Also move the "Thread type" section down a bit, since it is not so important anymore.

Fixes: rust-lang#33321

parser: do not try to continue with `unsafe` on foreign fns

The changed line makes it look like `unsafe` is allowed, but the first statement of `parse_item_foreign_fn` is:

```
self.expect_keyword(keywords::Fn)?;
```

So we get the strange "expected one of `fn`, `pub`, `static`, or `unsafe`, found `unsafe`".

Fixes: rust-lang#27361

typeck: if a private field exists, also check for a public method

For example, `Vec::len` is both a field and a method, and usually encountering `vec.len` just means that the parens were forgotten.

Fixes: rust-lang#26472

NOTE: I added the parameter `allow_private` to `method::exists` since I don't want to suggest inaccessible methods. For the second case, where only the method exists, I think it would make sense to set it to `false` as well, but I wanted to preserve compatibility for this case.

…Manishearth

Replace copy-pasted variable name with relevant one

errors in the doc

Remove rust flags from doc block

Fixes rust-lang#33405

r? @Manishearth

…bnik

Add an example to Wrapping's documentation.

Such an example would have helped me understand `Wrapping` quicker.

r? @steveklabnik

[Doc] Default cpu is "generic" (and not "default")

See [line 305](https://github.com/phil-opp/rust/blob/a22ca2872ef6782306012e6817dc4b8b778c43e9/src/librustc_back/target/mod.rs#L305).

doc: Update reference with better description of target_env

The definition of this value recently changed slightly. It no
longer corresponds directly to the target triple.

Also shuffled things around to make the order of cfg descriptions more
logical and added text related them to the target triple.

cc rust-lang#33403

Fix some some duplicate words.