[INFO] fetching crate contracts 0.6.2...
[INFO] testing contracts-0.6.2 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate contracts 0.6.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate contracts 0.6.2 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate contracts 0.6.2
[INFO] finished tweaking crates.io crate contracts 0.6.2
[INFO] tweaked toml for crates.io crate contracts 0.6.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate contracts 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85689402ac30e851344060555b9de9c58f083227fbaebb642a5f087bc4825769
[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" "85689402ac30e851344060555b9de9c58f083227fbaebb642a5f087bc4825769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85689402ac30e851344060555b9de9c58f083227fbaebb642a5f087bc4825769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85689402ac30e851344060555b9de9c58f083227fbaebb642a5f087bc4825769", kill_on_drop: false }`
[INFO] [stdout] 85689402ac30e851344060555b9de9c58f083227fbaebb642a5f087bc4825769
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--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] 9333a820efac8f66b7694341d40ffc8af01ebdbdbaf054b2531483f35b09ad2e
[INFO] running `Command { std: "docker" "start" "-a" "9333a820efac8f66b7694341d40ffc8af01ebdbdbaf054b2531483f35b09ad2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.50
[INFO] [stderr]    Compiling contracts v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `span`
[INFO] [stdout]    --> src/implementation/mod.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     pub(crate) span: Span,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Contract` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> src/implementation/mod.rs:126:10
[INFO] [stdout]     |
[INFO] [stdout] 126 | #[derive(Debug)]
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.64s
[INFO] running `Command { std: "docker" "inspect" "9333a820efac8f66b7694341d40ffc8af01ebdbdbaf054b2531483f35b09ad2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9333a820efac8f66b7694341d40ffc8af01ebdbdbaf054b2531483f35b09ad2e", kill_on_drop: false }`
[INFO] [stdout] 9333a820efac8f66b7694341d40ffc8af01ebdbdbaf054b2531483f35b09ad2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "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] fe90c561070804c7a57859cd9d9aba27d4a6d4ea611ba7a966ea15542143d0a7
[INFO] running `Command { std: "docker" "start" "-a" "fe90c561070804c7a57859cd9d9aba27d4a6d4ea611ba7a966ea15542143d0a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling contracts v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `span`
[INFO] [stdout]    --> src/implementation/mod.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     pub(crate) span: Span,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Contract` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> src/implementation/mod.rs:126:10
[INFO] [stdout]     |
[INFO] [stdout] 126 | #[derive(Debug)]
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> tests/functions.rs:121:18
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn impl_test(x: isize) -> impl Clone + PartialEq + std::fmt::Debug {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> tests/implication.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn only_true(t: bool) -> bool {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `span`
[INFO] [stdout]    --> src/implementation/mod.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     pub(crate) span: Span,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Contract` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> src/implementation/mod.rs:126:10
[INFO] [stdout]     |
[INFO] [stdout] 126 | #[derive(Debug)]
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.24s
[INFO] running `Command { std: "docker" "inspect" "fe90c561070804c7a57859cd9d9aba27d4a6d4ea611ba7a966ea15542143d0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe90c561070804c7a57859cd9d9aba27d4a6d4ea611ba7a966ea15542143d0a7", kill_on_drop: false }`
[INFO] [stdout] fe90c561070804c7a57859cd9d9aba27d4a6d4ea611ba7a966ea15542143d0a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6d9fbdd703a27351e93a03f38513d3b8cd864c7a8cc9f06a0b9e63d32b84ae89
[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" "6d9fbdd703a27351e93a03f38513d3b8cd864c7a8cc9f06a0b9e63d32b84ae89", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `span`
[INFO] [stderr]    --> src/implementation/mod.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub(crate) span: Span,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Contract` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    --> src/implementation/mod.rs:126:10
[INFO] [stderr]     |
[INFO] [stderr] 126 | #[derive(Debug)]
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `contracts` (lib) generated 1 warning
[INFO] [stderr] warning: `contracts` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> tests/implication.rs:56:18
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn only_true(t: bool) -> bool {
[INFO] [stderr]    |                  ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> tests/functions.rs:121:18
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn impl_test(x: isize) -> impl Clone + PartialEq + std::fmt::Debug {
[INFO] [stderr]     |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `contracts` (test "implication") generated 1 warning
[INFO] [stderr] warning: `contracts` (test "functions") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/contracts-0843b32916d8fdee)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test implementation::traits::tests::attributes_stay_on_trait_impl ... ok
[INFO] [stdout] test implementation::traits::tests::attributes_stay_on_trait_def ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test test_a_thing ... ok
[INFO] [stdout] test test_invariant ... ok
[INFO] [stdout] test test_mut_ref_and_lifetimes ... ok
[INFO] [stdout] test test_pattern_match ... ok
[INFO] [stdout] test test_sort ... ok
[INFO] [stderr]      Running tests/functions.rs (/opt/rustwide/target/debug/deps/functions-8d22d360fcbf19ab)
[INFO] [stdout] test test_impl_trait_arg ... ok
[INFO] [stderr]      Running tests/implication.rs (/opt/rustwide/target/debug/deps/implication-4689a13e2981691e)
[INFO] [stdout] test test_impl_trait_return ... ok
[INFO] [stdout] test test_early_return - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test test_nested_implication ... ok
[INFO] [stdout] test test_requires_implication ... ok
[INFO] [stdout] test test_ret_implication ... ok
[INFO] [stdout] test test_ret_implication_old ... ok
[INFO] [stderr]      Running tests/methods.rs (/opt/rustwide/target/debug/deps/methods-49794a1218e6928c)
[INFO] [stdout] test test_failing_implication - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running tests/old.rs (/opt/rustwide/target/debug/deps/old-14b69d3a25320673)
[INFO] [stdout] test impl_invariant ... ok
[INFO] [stdout] test methods ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_old_nested ... ok
[INFO] [stdout] test test_old_simple ... ok
[INFO] [stderr]      Running tests/ranged_int.rs (/opt/rustwide/target/debug/deps/ranged_int-526da6bbdcabe6e7)
[INFO] [stdout] test test_violation - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test ranged_int_add_reassign ... ok
[INFO] [stdout] test ranged_int_add ... ok
[INFO] [stderr]      Running tests/traits.rs (/opt/rustwide/target/debug/deps/traits-875d1f1aee288b69)
[INFO] [stdout] test construction_underflow - should panic ... ok
[INFO] [stderr]    Doc-tests contracts
[INFO] [stdout] test construction_overflow - should panic ... ok
[INFO] [stdout] test ranged_overflow - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test adder_example ... ok
[INFO] [stdout] test interpolate_example ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test src/lib.rs - (line 116) ... ok
[INFO] [stdout] test src/lib.rs - (line 22) ... ok
[INFO] [stdout] test src/lib.rs - (line 151) ... ok
[INFO] [stdout] test src/lib.rs - requires (line 190) ... ok
[INFO] [stdout] test src/lib.rs - ensures (line 246) ... ok
[INFO] [stdout] test src/lib.rs - invariant (line 293) ... ok
[INFO] [stdout] test src/lib.rs - (line 102) ... ok
[INFO] [stdout] test src/lib.rs - invariant (line 304) ... ok
[INFO] [stdout] test src/lib.rs - (line 32) ... ok
[INFO] [stdout] test src/lib.rs - ensures (line 238) ... ok
[INFO] [stdout] test src/lib.rs - contract_trait (line 371) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.93s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6d9fbdd703a27351e93a03f38513d3b8cd864c7a8cc9f06a0b9e63d32b84ae89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d9fbdd703a27351e93a03f38513d3b8cd864c7a8cc9f06a0b9e63d32b84ae89", kill_on_drop: false }`
[INFO] [stdout] 6d9fbdd703a27351e93a03f38513d3b8cd864c7a8cc9f06a0b9e63d32b84ae89