Rollup of 9 pull requests

[Manishearth]

• Successful merges: std: Optimize panic::catch_unwind slightly #35444, Introduce as_slice/as_mut_slice methods on std::vec::IntoIter struct. #35447, Correct span for pub_restricted field #35491, Add regression test for #22894. #35533, [MIR] track Location in MirVisitor, combine Location #35542, Improve &-ptr printing #35611, Fix incorrect unused import warnings on cfg_attred path attributes #35617, Upgrade linkchecker to url 1.2.0. #35638, compiletest: Remove dead code. #35640
• Failed merges:

[Manishearth]

@bors r+ p=10

[rust-highfive]

r? @nikomatsakis

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[bors]

📌 Commit 570c79d has been approved by Manishearth

[sophiajt]

@bors r-

This fails travis

src/librustc/mir/visit.rs:348:30: 348:42 error: this function takes 3 parameters but 2 parameters were supplied [E0061]

src/librustc/mir/visit.rs:348                         self.visit_lvalue(lvalue, LvalueContext::Store);

                                                           ^~~~~~~~~~~~

src/librustc/mir/visit.rs:767:1: 767:29 note: in this expansion of make_mir_visitor! (defined in src/librustc/mir/visit.rs)

src/librustc/mir/visit.rs:348:30: 348:42 help: run `rustc --explain E0061` to see a detailed explanation

src/librustc/mir/visit.rs:348:30: 348:42 note: the following parameter types were expected: &mir::repr::Lvalue<'tcx>, mir::visit::LvalueContext, mir::repr::Location

src/librustc/mir/visit.rs:348:30: 348:42 error: this function takes 3 parameters but 2 parameters were supplied [E0061]

src/librustc/mir/visit.rs:348                         self.visit_lvalue(lvalue, LvalueContext::Store);

                                                           ^~~~~~~~~~~~

src/librustc/mir/visit.rs:768:1: 768:35 note: in this expansion of make_mir_visitor! (defined in src/librustc/mir/visit.rs)

src/librustc/mir/visit.rs:348:30: 348:42 help: run `rustc --explain E0061` to see a detailed explanation

src/librustc/mir/visit.rs:348:30: 348:42 note: the following parameter types were expected: &mut mir::repr::Lvalue<'tcx>, mir::visit::LvalueContext, mir::repr::Location

cp: x86_64-unknown-linux-gnu/stage1/lib/libsyntax_ext

[eddyb]

Looks like #35542 has problems after merging.