Issue 1:
I tried this code:

fn main() {
let st = "this is a string";
let a: Vec(&str) = st.split(' ').collect();
println!("{:?}", a);
}

and got this compiler output:

$ rustc str.rs
str.rs:3:12: 3:21 error: parenthesized parameters may only be used with a trait [E0214]
str.rs:3 let a: Vec(&str) = st.split(' ').collect();
^~~~~~~~~
str.rs:3:15: 3:21 error: associated type bindings are not allowed here [E0229]
str.rs:3 let a: Vec(&str) = st.split(' ').collect();
^~~~~~
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'assertion failed: !predicates.has_escaping_regions()', /Users/rustbuild/src/rust-buildbot/slave/beta-dist-rustc-mac/build/src/librustc_typeck/check/mod.rs:1885

so here is my bug report!

Meta

$ rustc --verbose --version
rustc 1.0.0-beta (9854143cb 2015-04-02) (built 2015-04-02)
binary: rustc
commit-hash: 9854143cba679834bc4ef932858cd5303f015a0e
commit-date: 2015-04-02
build-date: 2015-04-02
host: x86_64-apple-darwin
release: 1.0.0-beta

$ RUST_BACKTRACE=1 rustc str.rs
str.rs:3:12: 3:21 error: parenthesized parameters may only be used with a trait [E0214]
str.rs:3 let a: Vec(&str) = st.split(' ').collect();
^~~~~~~~~
str.rs:3:15: 3:21 error: associated type bindings are not allowed here [E0229]
str.rs:3 let a: Vec(&str) = st.split(' ').collect();
^~~~~~
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'assertion failed: !predicates.has_escaping_regions()', /Users/rustbuild/src/rust-buildbot/slave/beta-dist-rustc-mac/build/src/librustc_typeck/check/mod.rs:1885

stack backtrace:
1: 0x109886f77 - sys::backtrace::write::h799ab135045ca9ca1LC
2: 0x1098b4e4d - panicking::on_panic::h9502e488a92fc8bcHAI
3: 0x1097d92de - rt::unwind::begin_unwind_inner::hf0537788ee16eadbiiI
4: 0x105def32f - rt::unwind::begin_unwind::h4512943908055748573
5: 0x105e654c9 - check::FnCtxt<'a, 'tcx>::add_obligations_for_parameters::hce6795515219f2632Ep
6: 0x105eac589 - check::wf::BoundsChecker<'cx, 'tcx>.TypeFolder<'tcx>::fold_ty::h64128c0bf80f4889MBl
7: 0x105ed7a92 - check::GatherLocalsVisitor<'a, 'tcx>.Visitor<'tcx>::visit_local::h83d3d99027249c87yUn
8: 0x105eb5d85 - check::check_fn::h410d0ffafb47f675l1n
9: 0x105ed432e - check::check_bare_fn::h05c77be534ada2cfUQn
10: 0x105ecdee2 - check::check_item::h9d89bedf29e4fe82F9n
11: 0x105faa676 - check_crate::closure.36302
12: 0x105fa4ae7 - check_crate::h09aa7856a322fd44bwC
13: 0x105cc7355 - driver::phase_3_run_analysis_passes::h1af60e7c926ca39dgGa
14: 0x105caba85 - driver::compile_input::h27cf4320fd56e5cbQba
15: 0x105d69a15 - run_compiler::h93c68a2a3c26052bV4b
16: 0x105d671e2 - boxed::F.FnBox<A>::call_box::h4498816167135712709
17: 0x105d666d7 - rt::unwind::try::try_fn::h2387014819904265058
18: 0x10993eea8 - rust_try_inner
19: 0x10993ee95 - rust_try
20: 0x105d669ca - boxed::F.FnBox<A>::call_box::h4850138824497903476
21: 0x10989e37d - sys::thread::create::thread_start::h42d6d904fce5365aihH
22: 0x7fff9112f267 - _pthread_body
23: 0x7fff9112f1e4 - _pthread_start

Issue 2:
Minimal example to reproduce (using parenthesis instead of <> ):

fn main() {
let v: Vec(&str) = vec!['1','2'];
}

~/D/s/o/test-rs git:master ❯❯❯ RUST_BACKTRACE=1 rustc src/main.rs
src/main.rs:2:12: 2:21 error: parenthesized parameters may only be used with a trait [E0214]
src/main.rs:2 let v: Vec(&str) = vec!['1','2'];
^~~~~~~~~
src/main.rs:2:15: 2:21 error: associated type bindings are not allowed here [E0229]
src/main.rs:2 let v: Vec(&str) = vec!['1','2'];
^~~~~~
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'assertion failed: !predicates.has_escaping_regions()', /Users/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-mac/build/src/librustc_typeck/check/mod.rs:1887

stack backtrace:
1: 0x103b1725b - sys::backtrace::write::hf72be5f813c90d15u5C
2: 0x103b42918 - panicking::on_panic::h357b9ffd8bc8f79dSWI
3: 0x103a5f7f7 - rt::unwind::begin_unwind_inner::h12b438ebbd8042edUFI
4: 0x100184bbf - rt::unwind::begin_unwind::h4407626155523256809
5: 0x1001f01b1 - check::FnCtxt<'a, 'tcx>::add_obligations_for_parameters::hedc68c4e9f8bb7eaR3o
6: 0x1002348de - check::wf::BoundsChecker<'cx, 'tcx>.TypeFolder<'tcx>::fold_ty::h81005dd8c26ce0f4dxl
7: 0x100259d85 - check::GatherLocalsVisitor<'a, 'tcx>.Visitor<'tcx>::visit_local::hbbae7f527d661f07Jln
8: 0x10023d4d5 - check::check_fn::h1d6196fc5f338991ssn
9: 0x1002583ef - check::check_bare_fn::h866934e1757608268hn
10: 0x100250650 - check::check_item::h403800fd4efc7443MAn
11: 0x100328962 - check_crate::closure.36029
12: 0x1003235ca - check_crate::hae957740b683eaa4IhC
13: 0x10005b6e7 - driver::phase_3_run_analysis_passes::hdf5ccffdc8a743bcsGa
14: 0x100041f96 - driver::compile_input::h7fdf739785f6d9d4Rba
15: 0x1001027d3 - run_compiler::hb484336e43423a0fv2b
16: 0x1001002f5 - thunk::F.Invoke<A, R>::invoke::h11654417678186204529
17: 0x1000ff6b7 - rt::unwind::try::try_fn::h10741634765121132143
18: 0x103bc6f68 - rust_try_inner
19: 0x103bc6f55 - rust_try
20: 0x1000ffa55 - thunk::F.Invoke<A, R>::invoke::h13457747256212984027
21: 0x103b2d83d - sys::thread::create::thread_start::h937519545136f3ecJBH
22: 0x7fff94a06267 - _pthread_body
23: 0x7fff94a061e4 - _pthread_start

rustc --version
rustc 1.0.0-nightly (f4e0ce66a 2015-03-19) (built 2015-03-20)