[INFO] fetching crate simple-message-channels 0.2.0...
[INFO] testing simple-message-channels-0.2.0 against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] extracting crate simple-message-channels 0.2.0 into /workspace/builds/worker-6-tc1/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-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple-message-channels 0.2.0 on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] [stdout] e8b7c0e734baafad3e8da8b046d1f42085a8a1166db82d2f4705521d5cca4ae0
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[INFO] [stdout] 1b8ef344239f1faeb4dac2feea53620e51ac445d56998d3e2470f83dd4c13a76
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[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)]` 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 1m 13s
[INFO] running `Command { std: "docker" "inspect" "1b8ef344239f1faeb4dac2feea53620e51ac445d56998d3e2470f83dd4c13a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b8ef344239f1faeb4dac2feea53620e51ac445d56998d3e2470f83dd4c13a76", kill_on_drop: false }`
[INFO] [stdout] 1b8ef344239f1faeb4dac2feea53620e51ac445d56998d3e2470f83dd4c13a76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c218907b65e9f02d4037f8cf3a8027f4ec2b82fcd6b30940ed2bc5bc6020473
[INFO] running `Command { std: "docker" "start" "-a" "7c218907b65e9f02d4037f8cf3a8027f4ec2b82fcd6b30940ed2bc5bc6020473", kill_on_drop: false }`
[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)]` 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] [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)]` 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] [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: 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/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 8.65s
[INFO] running `Command { std: "docker" "inspect" "7c218907b65e9f02d4037f8cf3a8027f4ec2b82fcd6b30940ed2bc5bc6020473", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c218907b65e9f02d4037f8cf3a8027f4ec2b82fcd6b30940ed2bc5bc6020473", kill_on_drop: false }`
[INFO] [stdout] 7c218907b65e9f02d4037f8cf3a8027f4ec2b82fcd6b30940ed2bc5bc6020473
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 947f18a5fc3878a58775b1f750508210f246919e0ea59e16335e96ecea297130
[INFO] running `Command { std: "docker" "start" "-a" "947f18a5fc3878a58775b1f750508210f246919e0ea59e16335e96ecea297130", 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)]` 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: 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/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` 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"` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/simple_message_channels-13b79543e8bdc54e)
[INFO] [stderr]    Doc-tests simple_message_channels
[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] [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] 6 | 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] 6 - let stdin = io::stdin().lock().await;
[INFO] [stdout] 6 + let stdin = i8::stdin().lock().await;
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these modules
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::io;
[INFO] [stdout]   |
[INFO] [stdout] 2 + 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] 10 |     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] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]   |                                      ------------------------------------- this is not `async`
[INFO] [stdout] 5 | use simple_message_channels::Reader;
[INFO] [stdout] 6 | 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] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_reader_rs_17_0() {
[INFO] [stdout]   |                                      ------------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 8 | 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] 4 | 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] 9 |     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 0.24s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "947f18a5fc3878a58775b1f750508210f246919e0ea59e16335e96ecea297130", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "947f18a5fc3878a58775b1f750508210f246919e0ea59e16335e96ecea297130", kill_on_drop: false }`
[INFO] [stdout] 947f18a5fc3878a58775b1f750508210f246919e0ea59e16335e96ecea297130
