Fold `MethodOrigin`s to resolve inference variables they may contain.
Fixes #17662.
Remove unnecessary allocation, update API name for starting the rustc driver.
Add missing case for pointer -> int when translating constant cast expressions

Closes issue #17458
Disallow casting directly between C-like enums and unsafe pointers

This closes issue #17444
Add regression test for issue #17458
Add regression test for issue #17444
Make find->tidy resilient to filenames with spaces
Fix async assertion in test_sendable_future
Make --dep-info escape spaces in filenames

Closes #17627
librustc/driver: expose build information of rustc.

CFG_RELEASE, CFG_VER_HASH and CFG_VER_DATE were only available as an output
to stdout from the driver::version() function that had an inconvenient
signature.
Guide: clarify exporting

Mention that using `pub` is called exporting.

Remove that `use` is called re-exporting, because `pub use` should be
called re-exporting. The guide currently doesn't cover `pub use`.
:fire: τ

Fixes #17674
use similar syntax in all arms

Fixes #17672
Don't compare () to null.

Fixes #17671.
Fix incorrect statement about ok()

Fixes #17676.
Output a note when lifetimes cannot be elided from functions
Add an explanatory note when calling a closure via `&`

Closes #15506.
Clarify some borrowck errors

Closes #17263.
Fix `make TAGS.vi` target

Remove superfluous parentheses from the CTAGS_LOCATIONS expression.
Fixes the following error when executing `make TAGS.vi`:

    /bin/sh: -c: line 0: syntax error near unexpected token `)'
Change the `use of moved value` error to be more accurate

Previously it output `partially moved` to eagerly. This updates it to be more
accurate and output `collaterally moved` for use of values that were invalidated
by moves out of different fields in the same struct.

Closes #15630.