[INFO] fetching crate simple-message-channels 0.2.0...
[INFO] testing simple-message-channels-0.2.0 against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] extracting crate simple-message-channels 0.2.0 into /workspace/builds/worker-1-tc2/source
[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-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple-message-channels 0.2.0 on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simple-message-channels 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 2d6a5ecfd2b828737f3bb7ed41b6433290a3523dec7232af4bffc279b794d92b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6550c8751d337c0181a44faacb89cf2ce410277ea73126afabf629bde2b0a00
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[INFO] [stderr]    Compiling num_cpus v1.11.1
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[INFO] [stderr]    Compiling async-std v1.1.0
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[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] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/message.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let _ = &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.18s
[INFO] running `Command { std: "docker" "inspect" "f6550c8751d337c0181a44faacb89cf2ce410277ea73126afabf629bde2b0a00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6550c8751d337c0181a44faacb89cf2ce410277ea73126afabf629bde2b0a00", kill_on_drop: false }`
[INFO] [stdout] f6550c8751d337c0181a44faacb89cf2ce410277ea73126afabf629bde2b0a00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0d51f9fdc4b049f68c6a892a6867bebf44964f613ad5249b909c2581753f4b3
[INFO] running `Command { std: "docker" "start" "-a" "e0d51f9fdc4b049f68c6a892a6867bebf44964f613ad5249b909c2581753f4b3", kill_on_drop: false }`
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/message.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let _ = &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[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: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{:?}" format string to use the `Debug` implementation of `()`
[INFO] [stdout]    |
[INFO] [stdout] 46 |             _ => panic!("{:?}", usage()),
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 46 -             _ => panic!(usage()),
[INFO] [stdout] 46 +             _ => std::panic::panic_any(usage()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/message.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let _ = &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `Command { std: "docker" "inspect" "e0d51f9fdc4b049f68c6a892a6867bebf44964f613ad5249b909c2581753f4b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0d51f9fdc4b049f68c6a892a6867bebf44964f613ad5249b909c2581753f4b3", kill_on_drop: false }`
[INFO] [stdout] e0d51f9fdc4b049f68c6a892a6867bebf44964f613ad5249b909c2581753f4b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 55cb5e98ac08284c9ce22196e12ef498dfc4346c911d89998bb327272ebddc6f
[INFO] running `Command { std: "docker" "start" "-a" "55cb5e98ac08284c9ce22196e12ef498dfc4346c911d89998bb327272ebddc6f", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/message.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 80 |     let _ = &mut buf[end..].copy_from_slice(&msg.message);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `simple-message-channels` (lib) generated 1 warning
[INFO] [stderr] warning: `simple-message-channels` (lib test) generated 1 warning (1 duplicate)
[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: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: add a "{:?}" format string to use the `Debug` implementation of `()`
[INFO] [stderr]    |
[INFO] [stderr] 46 |             _ => panic!("{:?}", usage()),
[INFO] [stderr]    |                         +++++++
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 46 -             _ => panic!(usage()),
[INFO] [stderr] 46 +             _ => std::panic::panic_any(usage()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `simple-message-channels` (example "tcp") generated 1 warning (run `cargo fix --example "tcp" -p simple-message-channels` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/simple_message_channels-a70d2025499eaa70)
[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 unresolved module or unlinked crate `io`
[INFO] [stdout]   --> src/reader.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 | let stdin = io::stdin().lock().await;
[INFO] [stdout]    |             ^^ use of unresolved module or unlinked crate `io`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `io`, use `cargo add io` to add it to your `Cargo.toml`
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 20 - let stdin = io::stdin().lock().await;
[INFO] [stdout] 20 + let stdin = i8::stdin().lock().await;
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these modules
[INFO] [stdout]    |
[INFO] [stdout] 16 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 16 + use async_std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `text` in this scope
[INFO] [stdout]   --> src/reader.rs:24:71
[INFO] [stdout]    |
[INFO] [stdout] 24 |     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:20:32
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]    |                                      ------------------------------------- this is not `async`
[INFO] [stdout] 19 | use simple_message_channels::Reader;
[INFO] [stdout] 20 | 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:22:37
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]    |                                      ------------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 22 | while let Some(msg) = reader.next().await {
[INFO] [stdout]    |                                     ^^^^^ only allowed inside `async` functions and blocks
[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:23:18
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]    |                                      ------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 23 |     let msg = msg?;
[INFO] [stdout]    |                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425, E0433, 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 0.13s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "55cb5e98ac08284c9ce22196e12ef498dfc4346c911d89998bb327272ebddc6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55cb5e98ac08284c9ce22196e12ef498dfc4346c911d89998bb327272ebddc6f", kill_on_drop: false }`
[INFO] [stdout] 55cb5e98ac08284c9ce22196e12ef498dfc4346c911d89998bb327272ebddc6f
