Co-Authored-By: Mazdak Farrokhzad <twingoow@gmail.com>

This commit adds a reproduction of the error reported in servo which
demonstrates the current, incorrect behaviour.

Co-authored-by: Rémy Rakić <remy.rakic@gmail.com>

The Dumper no longer has anything to do specifically with JSON, it
merely represents processing into an `Analysis` output.

Move `source_uitil` macros into `syntax_ext`
Cleanup dependencies of `rustc_driver`

Few other minor renamings for consistency.
Remove one unused dependency from `rustc_passes`.
Fix libsyntax tests.
Fix rebase.

This commit implements a hacky fix for detecting when a span is pointing
at a macro call site so that bare trait lints are not made incorrectly.

…me-elision-2, r=Centril

Allow lifetime elision in `Pin<&(mut) Self>`

This PR changes `self: &(mut) S` elision rules to instead visit the type of `self` and look for `&(mut) S` (where `is_self_ty(S)`) within it

Replaces rust-lang#60944

Closes rust-lang#52675

r? @eddyb
cc @cramertj @Centril @withoutboats @scottmcm

Break dependencies between `syntax_ext` and other crates

Move `source_util` macros into `syntax_ext`.
Move other early code generation facilities like standard library injection into `syntax_ext`.

The only crate that depends on `syntax_ext` now is `rustc_interface` which is one of the "final" crates that depend on everything.

Minor: Cleanup dependencies of `rustc_driver`, many of them are no longer used after introduction of `rustc_interface`.

r? @eddyb

Re-enable assertions in PPC dist builder

Fixes rust-lang#36150

Log of successful build:
https://dev.azure.com/mati865/6518b167-4cf6-4587-b3d1-8e137f2fb2e4/_apis/build/builds/23/logs/825

bump crossbeam-epoch dependency

The new crossbeam-epoch release depends on a memoffset with a whole bunch of soundness holes fixed.

The old memoffset is still indirectly depended on (at least) by rustc-rayon, though -- a crate that looks rather unmaintained (no change in more than a year).

… r=Xanewok

Cleanup save-analysis JsonDumper

add `repr(transparent)` to `IoSliceMut` where missing

tried using `IoSliceMut` in FFI, got `improper_ctypes` warning.

according to the docs: `IoSliceMut` is  "guaranteed to be ABI compatible with the `iovec` type" so it should be usable in FFI.
`IoSlice` is also `repr(transparent)` for every platform where these types contain `iovec`-like types.
vxworks also has `IoSliceMut` as transparent so its not even consistently one or the other.

no comment about this next to the types or in the PR that introduced the types, so assuming this was just missed.

r? @sfackler

…gestion, r=estebank

Stop bare trait lint applying to macro call sites

Fixes rust-lang#61963. Apologies for the delay with in fixing this. If anyone has a better idea how to detect this macro call site case, I'd be happy to fix this in a more robust, less hacky way.

r? @estebank