Unhide lines in rustdoc's doc -- Closes #11645
Add a limited prim type lookup for safer const expr evaluation
remove a layer of indirection from most intrinsics
Fix inconsistency in tutorial.md

Text refers to "the type shown earlier", when the type in
question was not in fact shown earlier.  I assume this is
an artifact of an earlier revision.
Add libc::consts::os::posix01::PTHREAD_STACK_MIN

Represents the minimum size of a thread's stack.  As such, it's both
platform and architecture-specific.

I put it under posix01 even though it predates POSIX.1-2001 by some
years.  I believe it was first formalized in SUSv2.  I doubt anyone
cares, though.
Retry on EINVAL from pthread_attr_setstacksize()

Enforce that the stack size is > RED_ZONE + PTHREAD_STACK_MIN.  If the
call to pthread_attr_setstacksize() subsequently fails with EINVAL, it
means that the platform requires the stack size to be a multiple of the
page size.  In that case, round up to the nearest page and retry.

Fixes #11694.
Use __pthread_get_minstack() when available.

glibc >= 2.15 has a __pthread_get_minstack() function that returns
PTHREAD_STACK_MIN plus however many bytes are needed for thread-local
storage.  Use it when it's available because just PTHREAD_STACK_MIN is
not enough in applications that have big thread-local storage
requirements.

Fixes #6233.
auto merge of #11933 : kini/rust/patch-1, r=alexcrichton

Text refers to "the type shown earlier", when the type in
question was not in fact shown earlier.  I assume this is
an artifact of an earlier revision.
auto merge of #11917 : thestinger/rust/intrinsic, r=alexcrichton
Disable fp elim on mac64

I believe that this is leading to lots of failures on the bots.

cc #11954
auto merge of #11955 : alexcrichton/rust/fix-unwinding-on-mac-64, r=cmr

I believe that this is leading to lots of failures on the bots.

cc #11954
auto merge of #11832 : jfager/rust/r5900, r=alexcrichton

I tried a couple of different ways to squash this, and still don't think this is ideal, but I wanted to get it out for feedback.

Closes #5900
Closes #9942

There are a few scenarios where the compiler tries to evaluate CastExprs without the corresponding types being available yet in the type context:  https://github.com/mozilla/rust/issues/10618, https://github.com/mozilla/rust/issues/5900, https://github.com/mozilla/rust/issues/9942

This PR takes the approach of having eval_const_expr_partial's CastExpr arm fall back to a limited ast_ty_to_ty call that only checks for (a subset of) valid const types, when the direct type lookup fails.  It's kind of hacky, so I understand if you don't want to take this as is.  I'd need a little mentoring to get this into better shape, as figuring out the proper fix has been a little daunting. I'm also happy if someone else wants to pick this up and run with it.

This closes 5900 and 9942, but only moves the goalposts a little on 10618, which now falls over in a later phase of the compiler.
auto merge of #11810 : Armavica/rust/issue-11645, r=alexcrichton

The doc-generating tool comments out the lines that match `/$# /` (note the space), which is not what is wanted here. And it lets live the lines matching `/$#[^ ]/`. But we still want to see a space. So I replaced the normal space by a non breakable one, which fools the parser into displaying the line.
Introduce marker types for indicating variance and for opting out
of builtin bounds.

Fixes #10834.
Fixes #11385.
cc #5922.
auto merge of #11885 : bnoordhuis/rust/issue11694, r=alexcrichton

EINVAL means that the requested stack size is either not a multiple
of the system page size or that it's smaller than PTHREAD_STACK_MIN.
Figure out what the case is, fix it up and retry.  If it still fails,
give up, like before.

Suggestions for future improvements:

  * don't fail!() but instead signal a condition, or
  * silently ignore the error and use a default sized stack.

Fixes #11694.

The first two commits put the framework in place, the third one contains the meat.
auto merge of #11768 : nikomatsakis/rust/issue-11385-cell-and-variance, r=pnkfelix

Introduce marker types for indicating variance and for opting out
of builtin bounds.

Fixes #10834.
Fixes #11385.
cc #5922.

r? @pnkfelix (since you reviewed the variance inference in the first place)