[INFO] fetching crate multhreadown 0.1.1...
[INFO] testing multhreadown-0.1.1 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate multhreadown 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate multhreadown 0.1.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate multhreadown 0.1.1
[INFO] tweaked toml for crates.io crate multhreadown 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate multhreadown 0.1.1 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate multhreadown 0.1.1 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-trait v0.1.84
[INFO] [stderr]   Downloaded syn v2.0.94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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_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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "f7cf0182b81d954f5e68f31622e9fde95a0e9c0919b49fee664278e53bce2fba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7cf0182b81d954f5e68f31622e9fde95a0e9c0919b49fee664278e53bce2fba", kill_on_drop: false }`
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[INFO] [stdout] aa37f005eaf2a26930b61d9c91fd465b850cb8c80d5a544653f718d92a6afabc
[INFO] running `Command { std: "docker" "start" "-a" "aa37f005eaf2a26930b61d9c91fd465b850cb8c80d5a544653f718d92a6afabc", kill_on_drop: false }`
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[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling multhreadown v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `IntegrityCheck` is never constructed
[INFO] [stdout]   --> src/config.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct IntegrityCheck {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChecksumAlgorithm` is never used
[INFO] [stdout]   --> src/config.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub enum ChecksumAlgorithm {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DownloadFilter` is never constructed
[INFO] [stdout]   --> src/config.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub struct DownloadFilter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 59.97s
[INFO] running `Command { std: "docker" "inspect" "aa37f005eaf2a26930b61d9c91fd465b850cb8c80d5a544653f718d92a6afabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa37f005eaf2a26930b61d9c91fd465b850cb8c80d5a544653f718d92a6afabc", kill_on_drop: false }`
[INFO] [stdout] aa37f005eaf2a26930b61d9c91fd465b850cb8c80d5a544653f718d92a6afabc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 909ff4e691f1eafa27b8d64a501245add8ea7dd8b3e6bdd998782354e6c73ccd
[INFO] running `Command { std: "docker" "start" "-a" "909ff4e691f1eafa27b8d64a501245add8ea7dd8b3e6bdd998782354e6c73ccd", kill_on_drop: false }`
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[INFO] [stderr]    Compiling h2 v0.3.26
[INFO] [stderr]    Compiling futures v0.3.31
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[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling serde_spanned v0.6.8
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling native-tls v0.2.12
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling criterion v0.5.1
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[INFO] [stderr]    Compiling toml v0.7.8
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling multhreadown v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `event_handler`
[INFO] [stdout]   --> examples/basic.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let event_handler = Arc::new(DefaultEventHandler);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_event_handler`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `command_rx` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> examples/basic.rs:59:31
[INFO] [stdout]    |
[INFO] [stdout] 59 |         while let Some(cmd) = command_rx.recv().await {
[INFO] [stdout]    |                               ^^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let (mut interactive_mode, status_tx, mut command_rx) = InteractiveMode::new();
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `multhreadown` (example "basic") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct `IntegrityCheck` is never constructed
[INFO] [stdout]   --> src/config.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct IntegrityCheck {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChecksumAlgorithm` is never used
[INFO] [stdout]   --> src/config.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub enum ChecksumAlgorithm {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DownloadFilter` is never constructed
[INFO] [stdout]   --> src/config.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub struct DownloadFilter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IntegrityCheck` is never constructed
[INFO] [stdout]   --> src/config.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct IntegrityCheck {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChecksumAlgorithm` is never used
[INFO] [stdout]   --> src/config.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub enum ChecksumAlgorithm {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DownloadFilter` is never constructed
[INFO] [stdout]   --> src/config.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub struct DownloadFilter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "909ff4e691f1eafa27b8d64a501245add8ea7dd8b3e6bdd998782354e6c73ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "909ff4e691f1eafa27b8d64a501245add8ea7dd8b3e6bdd998782354e6c73ccd", kill_on_drop: false }`
[INFO] [stdout] 909ff4e691f1eafa27b8d64a501245add8ea7dd8b3e6bdd998782354e6c73ccd