[INFO] fetching crate contrafact 0.1.0-dev.1...
[INFO] testing contrafact-0.1.0-dev.1 against 1.54.0 for beta-1.55-2
[INFO] extracting crate contrafact 0.1.0-dev.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate contrafact 0.1.0-dev.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate contrafact 0.1.0-dev.1
[INFO] finished tweaking crates.io crate contrafact 0.1.0-dev.1
[INFO] tweaked toml for crates.io crate contrafact 0.1.0-dev.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe60bb41709ae401f1150e00b3372cc321120cf25accfcd749d99b29a4cdafca
[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" "fe60bb41709ae401f1150e00b3372cc321120cf25accfcd749d99b29a4cdafca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe60bb41709ae401f1150e00b3372cc321120cf25accfcd749d99b29a4cdafca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe60bb41709ae401f1150e00b3372cc321120cf25accfcd749d99b29a4cdafca", kill_on_drop: false }`
[INFO] [stdout] fe60bb41709ae401f1150e00b3372cc321120cf25accfcd749d99b29a4cdafca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c4574e61424f81f6b0d81e83ff67adb16ef6ef6b960c4d46eb1aae0dd897f60
[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" "3c4574e61424f81f6b0d81e83ff67adb16ef6ef6b960c4d46eb1aae0dd897f60", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling derive_arbitrary v1.0.2
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling arbitrary v1.0.2
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling tracing v0.1.26
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling contrafact v0.1.0-dev.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/check.rs:35:20
[INFO] [stdout]    |
[INFO] [stdout] 35 |             panic!(msg);
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 35 |             panic!("{}", msg);
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 35 |             std::panic::panic_any(msg);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/fact.rs:49:16
[INFO] [stdout]    |
[INFO] [stdout] 49 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 50 | |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stdout] 51 | |             SATISFY_ATTEMPTS, last_failure
[INFO] [stdout] 52 | |         ));
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 49 |         panic!(
[INFO] [stdout] 50 |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stdout] 51 |             SATISFY_ATTEMPTS, last_failure
[INFO] [stdout] 52 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.91s
[INFO] running `Command { std: "docker" "inspect" "3c4574e61424f81f6b0d81e83ff67adb16ef6ef6b960c4d46eb1aae0dd897f60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c4574e61424f81f6b0d81e83ff67adb16ef6ef6b960c4d46eb1aae0dd897f60", kill_on_drop: false }`
[INFO] [stdout] 3c4574e61424f81f6b0d81e83ff67adb16ef6ef6b960c4d46eb1aae0dd897f60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 6984b66d8915a44048d4424c20aa67a8a9b91d8a88bdd654bf9f4eb7d262183a
[INFO] running `Command { std: "docker" "start" "-a" "6984b66d8915a44048d4424c20aa67a8a9b91d8a88bdd654bf9f4eb7d262183a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling bytemuck v1.7.2
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling str_stack v0.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling ahash v0.6.3
[INFO] [stderr]    Compiling sharded-slab v0.1.3
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling rgb v0.8.27
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling quick-xml v0.20.0
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling tracing-log v0.1.2
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling rmp v0.8.10
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling holochain_serialized_bytes_derive v0.0.51
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/check.rs:35:20
[INFO] [stdout]    |
[INFO] [stdout] 35 |             panic!(msg);
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 35 |             panic!("{}", msg);
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 35 |             std::panic::panic_any(msg);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/fact.rs:49:16
[INFO] [stdout]    |
[INFO] [stdout] 49 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 50 | |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stdout] 51 | |             SATISFY_ATTEMPTS, last_failure
[INFO] [stdout] 52 | |         ));
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 49 |         panic!(
[INFO] [stdout] 50 |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stdout] 51 |             SATISFY_ATTEMPTS, last_failure
[INFO] [stdout] 52 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-format v0.4.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling const-random v0.1.13
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling dashmap v3.11.10
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling pin-project v0.4.28
[INFO] [stderr]    Compiling futures-executor v0.3.16
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling rmp-serde v0.15.5
[INFO] [stderr]    Compiling serde-transcode v1.1.1
[INFO] [stderr]    Compiling serde_bytes v0.11.5
[INFO] [stderr]    Compiling futures v0.3.16
[INFO] [stderr]    Compiling structopt v0.3.22
[INFO] [stderr]    Compiling inferno v0.10.6
[INFO] [stderr]    Compiling opentelemetry v0.8.0
[INFO] [stderr]    Compiling tracing-subscriber v0.2.20
[INFO] [stderr]    Compiling holochain_serialized_bytes v0.0.51
[INFO] [stderr]    Compiling tracing-opentelemetry v0.8.0
[INFO] [stderr]    Compiling observability v0.1.3
[INFO] [stderr]    Compiling contrafact v0.1.0-dev.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/check.rs:35:20
[INFO] [stdout]    |
[INFO] [stdout] 35 |             panic!(msg);
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 35 |             panic!("{}", msg);
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 35 |             std::panic::panic_any(msg);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/fact.rs:49:16
[INFO] [stdout]    |
[INFO] [stdout] 49 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 50 | |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stdout] 51 | |             SATISFY_ATTEMPTS, last_failure
[INFO] [stdout] 52 | |         ));
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 49 |         panic!(
[INFO] [stdout] 50 |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stdout] 51 |             SATISFY_ATTEMPTS, last_failure
[INFO] [stdout] 52 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1m 47s
[INFO] running `Command { std: "docker" "inspect" "6984b66d8915a44048d4424c20aa67a8a9b91d8a88bdd654bf9f4eb7d262183a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6984b66d8915a44048d4424c20aa67a8a9b91d8a88bdd654bf9f4eb7d262183a", kill_on_drop: false }`
[INFO] [stdout] 6984b66d8915a44048d4424c20aa67a8a9b91d8a88bdd654bf9f4eb7d262183a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a0ea8d660201cb4b0866668c9a4a034be330426c801d2d87a205048d2de6cf49
[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" "a0ea8d660201cb4b0866668c9a4a034be330426c801d2d87a205048d2de6cf49", kill_on_drop: false }`
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/check.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |             panic!(msg);
[INFO] [stderr]    |                    ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 35 |             panic!("{}", msg);
[INFO] [stderr]    |                    ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 35 |             std::panic::panic_any(msg);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/fact.rs:49:16
[INFO] [stderr]    |
[INFO] [stderr] 49 |           panic!(format!(
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 50 | |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stderr] 51 | |             SATISFY_ATTEMPTS, last_failure
[INFO] [stderr] 52 | |         ));
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]    |
[INFO] [stderr] 49 |         panic!(
[INFO] [stderr] 50 |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stderr] 51 |             SATISFY_ATTEMPTS, last_failure
[INFO] [stderr] 52 |         );
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/check.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |             panic!(msg);
[INFO] [stderr]    |                    ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 35 |             panic!("{}", msg);
[INFO] [stderr]    |                    ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 35 |             std::panic::panic_any(msg);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/fact.rs:49:16
[INFO] [stderr]    |
[INFO] [stderr] 49 |           panic!(format!(
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 50 | |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stderr] 51 | |             SATISFY_ATTEMPTS, last_failure
[INFO] [stderr] 52 | |         ));
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]    |
[INFO] [stderr] 49 |         panic!(
[INFO] [stderr] 50 |             "Could not satisfy a constraint even after {} iterations. Last check failure: {:?}",
[INFO] [stderr] 51 |             SATISFY_ATTEMPTS, last_failure
[INFO] [stderr] 52 |         );
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.31s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/contrafact-23543512cad47fc6)
[INFO] [stdout] running 8 tests
[INFO] [stdout] test check::tests::test_check_fallible ... ok
[INFO] [stdout] test impls::primitives::tests::test_not ... ok
[INFO] [stdout] test impls::lens::tests::test ... ok
[INFO] [stdout] test impls::primitives::tests::test_eq ... ok
[INFO] [stdout] test impls::primitives::tests::test_or ... ok
[INFO] [stdout] test impls::prism::tests::stateless ... ok
[INFO] [stdout] test impls::mapped::test_mapped_fact ... ok
[INFO] [stdout] test impls::prism::tests::stateful ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.76s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running tests/chainlink.rs (/opt/rustwide/target/debug/deps/chainlink-ac61b1ef8c3e2f77)
[INFO] [stdout] test test_link ... ok
[INFO] [stderr]      Running tests/complex.rs (/opt/rustwide/target/debug/deps/complex-f864cce3f31a1259)
[INFO] [stdout] test test_wrapper ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.69s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests contrafact
[INFO] [stdout] test test_omega_fact ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.66s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test src/check.rs - check::Check::check (line 66) ... ok
[INFO] [stdout] test src/check.rs - check::Check::pass (line 81) ... ok
[INFO] [stdout] test src/check.rs - check::Check::fail (line 93) ... ok
[INFO] [stdout] test src/check.rs - check::Check::result (line 51) ... ok
[INFO] [stdout] test src/check.rs - check_fallible (line 118) ... ok
[INFO] [stdout] test src/lib.rs - (line 13) ... ok
[INFO] [stdout] test src/satisfy.rs - facts (line 51) ... ok
[INFO] [stdout] test src/impls/lens.rs - impls::lens::lens (line 18) ... ok
[INFO] [stdout] test src/impls/brute.rs - impls::brute::brute (line 37) ... ok
[INFO] [stdout] test src/impls/prism.rs - impls::prism::prism (line 21) ... ok
[INFO] [stdout] test src/impls/mapped.rs - impls::mapped::mapped (line 31) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 5.82s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a0ea8d660201cb4b0866668c9a4a034be330426c801d2d87a205048d2de6cf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0ea8d660201cb4b0866668c9a4a034be330426c801d2d87a205048d2de6cf49", kill_on_drop: false }`
[INFO] [stdout] a0ea8d660201cb4b0866668c9a4a034be330426c801d2d87a205048d2de6cf49
