[INFO] fetching crate rtic-core 0.3.1...
[INFO] testing rtic-core-0.3.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate rtic-core 0.3.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rtic-core 0.3.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rtic-core 0.3.1
[INFO] finished tweaking crates.io crate rtic-core 0.3.1
[INFO] tweaked toml for crates.io crate rtic-core 0.3.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb0e1966a5d284ce3c0dbee8e46d260a154be5f11b98da575b9514d3e21a415f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cb0e1966a5d284ce3c0dbee8e46d260a154be5f11b98da575b9514d3e21a415f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb0e1966a5d284ce3c0dbee8e46d260a154be5f11b98da575b9514d3e21a415f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb0e1966a5d284ce3c0dbee8e46d260a154be5f11b98da575b9514d3e21a415f", kill_on_drop: false }`
[INFO] [stdout] cb0e1966a5d284ce3c0dbee8e46d260a154be5f11b98da575b9514d3e21a415f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f883f8ba12ff8556a3a0430abb17c4cec85b17a806ec651696b9aed6d31bd819
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f883f8ba12ff8556a3a0430abb17c4cec85b17a806ec651696b9aed6d31bd819", kill_on_drop: false }`
[INFO] [stderr]    Compiling rtic-core v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "f883f8ba12ff8556a3a0430abb17c4cec85b17a806ec651696b9aed6d31bd819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f883f8ba12ff8556a3a0430abb17c4cec85b17a806ec651696b9aed6d31bd819", kill_on_drop: false }`
[INFO] [stdout] f883f8ba12ff8556a3a0430abb17c4cec85b17a806ec651696b9aed6d31bd819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 363d0aff2717966b85070ef5403ae3ac93c38c56ff7ae1d613b7b667fd09d234
[INFO] running `Command { std: "docker" "start" "-a" "363d0aff2717966b85070ef5403ae3ac93c38c56ff7ae1d613b7b667fd09d234", kill_on_drop: false }`
[INFO] [stderr]    Compiling rtic-core v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "363d0aff2717966b85070ef5403ae3ac93c38c56ff7ae1d613b7b667fd09d234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "363d0aff2717966b85070ef5403ae3ac93c38c56ff7ae1d613b7b667fd09d234", kill_on_drop: false }`
[INFO] [stdout] 363d0aff2717966b85070ef5403ae3ac93c38c56ff7ae1d613b7b667fd09d234
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a98641aa0edfcf00c0c8603fa215a5b7d52018d70759e79b567307149803290c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a98641aa0edfcf00c0c8603fa215a5b7d52018d70759e79b567307149803290c", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rtic_core-a73d2a04094839c3
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rtic-core
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - prelude (line 100) ... FAILED
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stdout] test src/lib.rs - prelude (line 77) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - prelude (line 100) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `mutex_trait`?
[INFO] [stdout]  --> src/lib.rs:101:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mutex_trait::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^ maybe a missing crate `mutex_trait`?
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Mutex` in this scope
[INFO] [stdout]  --> src/lib.rs:104:18
[INFO] [stdout]   |
[INFO] [stdout] 6 |     a: &mut impl Mutex<T = i32>,
[INFO] [stdout]   |                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Mutex` in this scope
[INFO] [stdout]  --> src/lib.rs:105:18
[INFO] [stdout]   |
[INFO] [stdout] 7 |     b: &mut impl Mutex<T = i32>,
[INFO] [stdout]   |                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Mutex` in this scope
[INFO] [stdout]  --> src/lib.rs:106:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |     c: &mut impl Mutex<T = i32>
[INFO] [stdout]   |                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0405, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0405`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - prelude (line 77) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `mutex_trait`?
[INFO] [stdout]  --> src/lib.rs:78:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mutex_trait::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^ maybe a missing crate `mutex_trait`?
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Mutex` in this scope
[INFO] [stdout]  --> src/lib.rs:81:18
[INFO] [stdout]   |
[INFO] [stdout] 6 |     a: &mut impl Mutex<T = i32>,
[INFO] [stdout]   |                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Mutex` in this scope
[INFO] [stdout]  --> src/lib.rs:82:18
[INFO] [stdout]   |
[INFO] [stdout] 7 |     b: &mut impl Mutex<T = i32>,
[INFO] [stdout]   |                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Mutex` in this scope
[INFO] [stdout]  --> src/lib.rs:83:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |     c: &mut impl Mutex<T = i32>
[INFO] [stdout]   |                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0405, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0405`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - prelude (line 100)
[INFO] [stdout]     src/lib.rs - prelude (line 77)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a98641aa0edfcf00c0c8603fa215a5b7d52018d70759e79b567307149803290c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a98641aa0edfcf00c0c8603fa215a5b7d52018d70759e79b567307149803290c", kill_on_drop: false }`
[INFO] [stdout] a98641aa0edfcf00c0c8603fa215a5b7d52018d70759e79b567307149803290c