Rust 1.20 regression, multiqueue 0.3.2, match arms have incompatible types

[brson]

https://github.com/schets/multiqueue

brian@ip-10-145-43-250:/mnt2/dev/multiqueue⟫ git log -1
commit f28f252a0c77d628d18192913d5a8049d85e9a1e
Merge: 133dc88 b3c40d6
Author: Samuel Schetterer <[email protected]>
Date:   Wed Apr 5 12:14:19 2017 -0400

    Merge pull request #12 from schets/fix_sync_req

    Added proper Sync requirements for Broadcast Queues

brian@ip-10-145-43-250:/mnt2/dev/euclid⟫ rustc +beta -Vv
rustc 1.19.0-beta.2 (a175ee509 2017-06-15)
binary: rustc
commit-hash: a175ee509bca5069b01cea9a35c6f333d2250eee
commit-date: 2017-06-15
host: x86_64-unknown-linux-gnu
release: 1.19.0-beta.2
LLVM version: 4.0

error[E0308]: match arms have incompatible types
   --> src/bin/example.rs:107:29
    |
107 |           scope.spawn(move || for val in single_recv.iter_with(|item_ref| 10 * *item_ref) {
    |  _____________________________^
108 | |             println!("{}", val);
109 | |         });
    | |_________^ expected (), found i32
    |
    = note: expected type `()`
               found type `i32`
note: match arm with an incompatible type
   --> src/bin/example.rs:107:29
    |
107 |           scope.spawn(move || for val in single_recv.iter_with(|item_ref| 10 * *item_ref) {
    |  _____________________________^
108 | |             println!("{}", val);
109 | |         });
    | |_________^

error[E0308]: match arms have incompatible types
   --> src/bin/example.rs:114:29
    |
114 |           scope.spawn(move || for val in
    |  _____________________________^
115 | |             single_recv_2.try_iter_with(|item_ref| 10 * *item_ref) {
116 | |             println!("{}", val);
117 | |         });
    | |_________^ expected (), found i32
    |
    = note: expected type `()`
               found type `i32`
note: match arm with an incompatible type
   --> src/bin/example.rs:114:29
    |
114 |           scope.spawn(move || for val in
    |  _____________________________^
115 | |             single_recv_2.try_iter_with(|item_ref| 10 * *item_ref) {
116 | |             println!("{}", val);
117 | |         });
    | |_________^

error: aborting due to previous error(s)

error: Could not compile `multiqueue`.

cc @schets

[Mark-Simulacrum]

#42265 -- currently being backported to beta.

[nikomatsakis]

@Mark-Simulacrum did it get backported? I don't see any links there...?

[nikomatsakis]

oh, looks like it landed in #42927 -- can someone verify if this is fixed?

[brson]

Seems like we need to get a new beta out asap.

[brson]

I've bumped the beta #43113

[brson]

I've confirmed the fix on beta.3. Thanks all.