[INFO] cloning repository https://github.com/P-bibs/skiff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/P-bibs/skiff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FP-bibs%2Fskiff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FP-bibs%2Fskiff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff75190b21359992c44407466249d2f0cef3417a
[INFO] testing P-bibs/skiff against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FP-bibs%2Fskiff" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/P-bibs/skiff on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/P-bibs/skiff
[INFO] finished tweaking git repo https://github.com/P-bibs/skiff
[INFO] tweaked toml for git repo https://github.com/P-bibs/skiff written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/P-bibs/skiff already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded logos-derive v0.12.0
[INFO] [stderr]   Downloaded beef v0.5.0
[INFO] [stderr]   Downloaded sized-chunks v0.6.5
[INFO] [stderr]   Downloaded logos v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8f20536d4302c553eada1bd47d1f5c933916c2229fa444e3abb1b551e138f2c
[INFO] running `Command { std: "docker" "start" "-a" "d8f20536d4302c553eada1bd47d1f5c933916c2229fa444e3abb1b551e138f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8f20536d4302c553eada1bd47d1f5c933916c2229fa444e3abb1b551e138f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8f20536d4302c553eada1bd47d1f5c933916c2229fa444e3abb1b551e138f2c", kill_on_drop: false }`
[INFO] [stdout] d8f20536d4302c553eada1bd47d1f5c933916c2229fa444e3abb1b551e138f2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f34aa1cfe61348ded5572f3486a4844d44342577c37a5150534616765d26d1f
[INFO] running `Command { std: "docker" "start" "-a" "2f34aa1cfe61348ded5572f3486a4844d44342577c37a5150534616765d26d1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling beef v0.5.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling sized-chunks v0.6.5
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling logos-derive v0.12.0
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling logos v0.12.0
[INFO] [stderr]    Compiling skiff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> src/parser/parse.rs:158:29
[INFO] [stdout]     |
[INFO] [stdout] 158 |         Some((Token::Comma, span)) => {
[INFO] [stdout]     |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser/parse.rs:21:21
[INFO] [stdout]    |
[INFO] [stdout] 21 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[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] 21 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 21 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser/patterns/parse.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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] 10 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.12s
[INFO] running `Command { std: "docker" "inspect" "2f34aa1cfe61348ded5572f3486a4844d44342577c37a5150534616765d26d1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f34aa1cfe61348ded5572f3486a4844d44342577c37a5150534616765d26d1f", kill_on_drop: false }`
[INFO] [stdout] 2f34aa1cfe61348ded5572f3486a4844d44342577c37a5150534616765d26d1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b8ba49c9b3dffd5125b5a2256008612bb05429d9adca178bd226df59593b9d3
[INFO] running `Command { std: "docker" "start" "-a" "7b8ba49c9b3dffd5125b5a2256008612bb05429d9adca178bd226df59593b9d3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> src/parser/parse.rs:158:29
[INFO] [stdout]     |
[INFO] [stdout] 158 |         Some((Token::Comma, span)) => {
[INFO] [stdout]     |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling skiff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser/parse.rs:21:21
[INFO] [stdout]    |
[INFO] [stdout] 21 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[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] 21 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 21 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser/patterns/parse.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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] 10 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> src/parser/parse.rs:158:29
[INFO] [stdout]     |
[INFO] [stdout] 158 |         Some((Token::Comma, span)) => {
[INFO] [stdout]     |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser/parse.rs:21:21
[INFO] [stdout]    |
[INFO] [stdout] 21 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[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] 21 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 21 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser/patterns/parse.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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] 10 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 10 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `Command { std: "docker" "inspect" "7b8ba49c9b3dffd5125b5a2256008612bb05429d9adca178bd226df59593b9d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b8ba49c9b3dffd5125b5a2256008612bb05429d9adca178bd226df59593b9d3", kill_on_drop: false }`
[INFO] [stdout] 7b8ba49c9b3dffd5125b5a2256008612bb05429d9adca178bd226df59593b9d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] af1e833ebfb65a9e6a5180d29f3f32c1e3e6f3c8164d357ba86430fa4d7666aa
[INFO] running `Command { std: "docker" "start" "-a" "af1e833ebfb65a9e6a5180d29f3f32c1e3e6f3c8164d357ba86430fa4d7666aa", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `span`
[INFO] [stderr]    --> src/parser/parse.rs:158:29
[INFO] [stderr]     |
[INFO] [stderr] 158 |         Some((Token::Comma, span)) => {
[INFO] [stderr]     |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/parser/parse.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[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] 21 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |                     ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 21 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/parser/patterns/parse.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] 10 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |                     ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 10 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `span`
[INFO] [stderr]    --> src/parser/parse.rs:158:29
[INFO] [stderr]     |
[INFO] [stderr] 158 |         Some((Token::Comma, span)) => {
[INFO] [stderr]     |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/parser/parse.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[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] 21 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |                     ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 21 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/parser/patterns/parse.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 |         _ => panic!(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] 10 |         _ => panic!("{}", format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout] 
[INFO] [stderr]    |                     ^^^^^
[INFO] [stdout] running 3 tests
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stdout] test lexer::lex::tests::lexes_identifiers ... ok
[INFO] [stderr]    |
[INFO] [stdout] test lexer::lex::tests::lexes_number ... ok
[INFO] [stderr] 10 |         _ => std::panic::panic_any(format!("Tried to get binding power of non-op token {:?}", op).to_string()),
[INFO] [stdout] test lexer::lex::tests::lexes_numbers_and_ops ... ok
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/skiff-6b9414530507d596)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/skiff-70a8eb1998999c7d)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]      Running tests/diff_test.rs (/opt/rustwide/target/debug/deps/diff_test-73f2cbe7fc21aa43)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test diff_test ... 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] [stderr]    Doc-tests skiff
[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] running `Command { std: "docker" "inspect" "af1e833ebfb65a9e6a5180d29f3f32c1e3e6f3c8164d357ba86430fa4d7666aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af1e833ebfb65a9e6a5180d29f3f32c1e3e6f3c8164d357ba86430fa4d7666aa", kill_on_drop: false }`
[INFO] [stdout] af1e833ebfb65a9e6a5180d29f3f32c1e3e6f3c8164d357ba86430fa4d7666aa