[INFO] fetching crate simple-message-channels 0.2.0...
[INFO] testing simple-message-channels-0.2.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate simple-message-channels 0.2.0 into /workspace/builds/worker-86/source
[INFO] validating manifest of crates.io crate simple-message-channels 0.2.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-message-channels 0.2.0
[INFO] finished tweaking crates.io crate simple-message-channels 0.2.0
[INFO] tweaked toml for crates.io crate simple-message-channels 0.2.0 written to /workspace/builds/worker-86/source/Cargo.toml
[INFO] crate crates.io crate simple-message-channels 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4eba80a6a5d3679e6754da809d21f379017560118fa03d1dd7783a149b34bea
[INFO] running `Command { std: "docker" "start" "-a" "c4eba80a6a5d3679e6754da809d21f379017560118fa03d1dd7783a149b34bea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4eba80a6a5d3679e6754da809d21f379017560118fa03d1dd7783a149b34bea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4eba80a6a5d3679e6754da809d21f379017560118fa03d1dd7783a149b34bea", kill_on_drop: false }`
[INFO] [stdout] c4eba80a6a5d3679e6754da809d21f379017560118fa03d1dd7783a149b34bea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44b3fe2c9843757edbdd2535e9228f7ba792ad31704ccb29fc0f0acf4a002ded
[INFO] running `Command { std: "docker" "start" "-a" "44b3fe2c9843757edbdd2535e9228f7ba792ad31704ccb29fc0f0acf4a002ded", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling futures-core v0.3.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-sink v0.3.1
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-io v0.3.1
[INFO] [stderr]    Compiling futures-task v0.3.1
[INFO] [stderr]    Compiling pin-project-lite v0.1.1
[INFO] [stderr]    Compiling once_cell v1.2.0
[INFO] [stderr]    Compiling futures-timer v2.0.2
[INFO] [stderr]    Compiling varinteger v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
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[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling async-task v1.0.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.4
[INFO] [stderr]    Compiling crossbeam-channel v0.4.0
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[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling mio v0.6.20
[INFO] [stderr]    Compiling broadcaster v0.2.6
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling async-std v1.1.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling simple-message-channels v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.29s
[INFO] running `Command { std: "docker" "inspect" "44b3fe2c9843757edbdd2535e9228f7ba792ad31704ccb29fc0f0acf4a002ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44b3fe2c9843757edbdd2535e9228f7ba792ad31704ccb29fc0f0acf4a002ded", kill_on_drop: false }`
[INFO] [stdout] 44b3fe2c9843757edbdd2535e9228f7ba792ad31704ccb29fc0f0acf4a002ded
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e4f4923f62623a0f41886ffde52198af96edc73cd0d02a1981c03d349131db7
[INFO] running `Command { std: "docker" "start" "-a" "7e4f4923f62623a0f41886ffde52198af96edc73cd0d02a1981c03d349131db7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling simple-message-channels v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> examples/tcp.rs:46:25
[INFO] [stdout]    |
[INFO] [stdout] 46 |             _ => panic!(usage()),
[INFO] [stdout]    |                         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 46 |             _ => panic!("{}", usage()),
[INFO] [stdout]    |                         ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 46 |             _ => std::panic::panic_any(usage()),
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.80s
[INFO] running `Command { std: "docker" "inspect" "7e4f4923f62623a0f41886ffde52198af96edc73cd0d02a1981c03d349131db7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e4f4923f62623a0f41886ffde52198af96edc73cd0d02a1981c03d349131db7", kill_on_drop: false }`
[INFO] [stdout] 7e4f4923f62623a0f41886ffde52198af96edc73cd0d02a1981c03d349131db7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5469bbdba6d01de02469769b79cc2e8855617f8dfa79a69e2e107e7b04861b1b
[INFO] running `Command { std: "docker" "start" "-a" "5469bbdba6d01de02469769b79cc2e8855617f8dfa79a69e2e107e7b04861b1b", kill_on_drop: false }`
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> examples/tcp.rs:46:25
[INFO] [stderr]    |
[INFO] [stderr] 46 |             _ => panic!(usage()),
[INFO] [stderr]    |                         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 46 |             _ => panic!("{}", usage()),
[INFO] [stderr]    |                         ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 46 |             _ => std::panic::panic_any(usage()),
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/simple_message_channels-82ce5e95a87c8fcc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests simple-message-channels
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/reader.rs - reader::Reader (line 17) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/reader.rs - reader::Reader (line 17) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]  --> src/reader.rs:19:13
[INFO] [stdout]   |
[INFO] [stdout] 5 | let stdin = io::stdin().lock().await;
[INFO] [stdout]   |             ^^ use of undeclared crate or module `io`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `text` in this scope
[INFO] [stdout]  --> src/reader.rs:23:71
[INFO] [stdout]   |
[INFO] [stdout] 9 |     println!("Received: ch {} typ {} msg {:?}", msg.channel, msg.typ, text);
[INFO] [stdout]   |                                                                       ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]  --> src/reader.rs:19:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]   |                                         -------------------------------- this is not `async`
[INFO] [stdout] 4 | use simple_message_channels::Reader;
[INFO] [stdout] 5 | let stdin = io::stdin().lock().await;
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]  --> src/reader.rs:21:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]   |                                         -------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 7 | while let Some(msg) = reader.next().await {
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `next` found for struct `Reader` in the current scope
[INFO] [stdout]  --> src/reader.rs:21:30
[INFO] [stdout]   |
[INFO] [stdout] 7 | while let Some(msg) = reader.next().await {
[INFO] [stdout]   |                              ^^^^ method not found in `Reader<_>`
[INFO] [stdout]   |
[INFO] [stdout]   = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::str::pattern::Searcher;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use async_std::stream::stream::StreamExt;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures_util::stream::StreamExt;
[INFO] [stdout]   |
[INFO] [stdout]     and 1 other candidate
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/reader.rs:22:18
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | use simple_message_channels::Reader;
[INFO] [stdout] 5  | | let stdin = io::stdin().lock().await;
[INFO] [stdout] 6  | | let mut reader = Reader::new(stdin);
[INFO] [stdout] 7  | | while let Some(msg) = reader.next().await {
[INFO] [stdout] 8  | |     let msg = msg?;
[INFO] [stdout]    | |                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 9  | |     println!("Received: ch {} typ {} msg {:?}", msg.channel, msg.typ, text);
[INFO] [stdout] 10 | | }
[INFO] [stdout] 11 | | } _doctest_main_src_reader_rs_17_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425, E0433, E0599, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/reader.rs - reader::Reader (line 17)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.22s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "5469bbdba6d01de02469769b79cc2e8855617f8dfa79a69e2e107e7b04861b1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5469bbdba6d01de02469769b79cc2e8855617f8dfa79a69e2e107e7b04861b1b", kill_on_drop: false }`
[INFO] [stdout] 5469bbdba6d01de02469769b79cc2e8855617f8dfa79a69e2e107e7b04861b1b
