Integrate miri into build-manifest
This fixes a mistake where miri was accidentally left out of the
build-manifest parsing, meaning that today's nightly generated a
manifest with invalid urls!
Fixes#57488.
In functions with lots of region constraint, if the fixed point
iteration converges only slowly, a lot of the var/var constraints will
have equal regions most of the time. Yet, we still perform the LUB
calculation and try to intern the result. Especially the latter incurs
quite some overhead.
This reduces the take taken by the item bodies checking pass for the
unicode_normalization crate by about 75%.
Once a region has been expanded to cover a fixed region, a corresponding
RegSubVar constraint won't have any effect on the expansion anymore, the
same is true for constraints where the variable on the RHS has already
reached static scope. By removing those constraints from the set that
we're iterating over, we remove a lot of needless overhead in case of
slow convergences (i.e. lots of iterations).
For the unicode_normalization crate, this about cuts the time required
for item_bodies checking in half.
This fixes a mistake where miri was accidentally left out of the
build-manifest parsing, meaning that today's nightly generated a
manifest with invalid urls!
On Windows process exit codes are never signals but rather always 32-bit
integers. Most faults like segfaults and such end up having large
integers used to represent them, like STATUS_ACCESS_VIOLATION being
0xC0000005. Currently, however, when an `ExitStatus` is printed this
ends up getting rendered as 3221225477 which is somewhat more difficult
to debug.
This commit adds a branch in `Display for ExitStatus` on Windows which
handles exit statuses where the high bit is set and prints those exit
statuses as hex instead of with decimals. This will hopefully preserve
the current display for small exit statuses (like `exit code: 22`), but
assist in quickly debugging segfaults/access violations/etc. I've
found at least that the hex codes are easier to search for than decimal.
I wasn't able to find any official documentation saying that all system
exit codes have the high bit set, but I figure it's a good enough
heuristic for now.
This fixes#57462.
The relevant part from the hir type collector is:
```
DEBUG 2019-01-09T15:42:58Z: rustc::hir::map::collector: hir_map: NodeId(32) => Entry { parent: NodeId(33), dep_node: 4294967040, node: Expr(expr(32: <Foo>::new)) }
DEBUG 2019-01-09T15:42:58Z: rustc::hir::map::collector: hir_map: NodeId(48) => Entry { parent: NodeId(32), dep_node: 4294967040, node: Ty(type(Foo)) }
DEBUG 2019-01-09T15:42:58Z: rustc::hir::map::collector: hir_map: NodeId(30) => Entry { parent: NodeId(48), dep_node: 4294967040, node: PathSegment(PathSegment { ident: Foo#0, id: Some(NodeId(30)), def: Some(Err), args: None, infer_types: true }) }
DEBUG 2019-01-09T15:42:58Z: rustc::hir::map::collector: hir_map: NodeId(31) => Entry { parent: NodeId(32), dep_node: 4294967040, node: PathSegment(PathSegment { ident: new#0, id: Some(NodeId(31)), def: Some(Err), args: None, infer_types: true }) }
```
We have the right ID when looking for NodeId(31) and try with NodeId(32) (which
is the right thing to look for) from get_path_data, but not for the segments
that we write from `write_sub_paths_truncated`.
Basically `process_path` takes an id which is always the parent, and that we
fall back to in `get_path_data()`, so we get the right result for the last path
segment, but not for the other segments that get written to from
`write_sub_paths_truncated`.
I think we can stop passing the explicit id around to `get_path_data` now, will
consider sending that as a followup.
