[INFO] fetching crate hc 0.1.2...
[INFO] checking hc-0.1.2 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate hc 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate hc 0.1.2 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hc 0.1.2
[INFO] finished tweaking crates.io crate hc 0.1.2
[INFO] tweaked toml for crates.io crate hc 0.1.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7db5758f101ae80bc1c0adb727615d9533d0f3fa0c6e701e01befd682153c29
[INFO] running `Command { std: "docker" "start" "-a" "a7db5758f101ae80bc1c0adb727615d9533d0f3fa0c6e701e01befd682153c29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7db5758f101ae80bc1c0adb727615d9533d0f3fa0c6e701e01befd682153c29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7db5758f101ae80bc1c0adb727615d9533d0f3fa0c6e701e01befd682153c29", kill_on_drop: false }`
[INFO] [stdout] a7db5758f101ae80bc1c0adb727615d9533d0f3fa0c6e701e01befd682153c29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2329ade1ec7a54ed37259bda8cda3fdd3541fa787f0713f3c2de2cd31b9f4e54
[INFO] running `Command { std: "docker" "start" "-a" "2329ade1ec7a54ed37259bda8cda3fdd3541fa787f0713f3c2de2cd31b9f4e54", kill_on_drop: false }`
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking encode_unicode v0.1.3
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking rustyline v1.0.0
[INFO] [stderr]     Checking hc v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:125:17
[INFO] [stdout]     |
[INFO] [stdout] 125 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:126:17
[INFO] [stdout]     |
[INFO] [stdout] 126 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:135:17
[INFO] [stdout]     |
[INFO] [stdout] 135 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:160:17
[INFO] [stdout]     |
[INFO] [stdout] 160 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:169:17
[INFO] [stdout]     |
[INFO] [stdout] 169 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:170:17
[INFO] [stdout]     |
[INFO] [stdout] 170 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:180:17
[INFO] [stdout]     |
[INFO] [stdout] 180 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:190:17
[INFO] [stdout]     |
[INFO] [stdout] 190 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:199:17
[INFO] [stdout]     |
[INFO] [stdout] 199 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:209:17
[INFO] [stdout]     |
[INFO] [stdout] 209 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:210:17
[INFO] [stdout]     |
[INFO] [stdout] 210 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:219:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 220 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:229:17
[INFO] [stdout]     |
[INFO] [stdout] 229 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:125:17
[INFO] [stdout]     |
[INFO] [stdout] 125 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:126:17
[INFO] [stdout]     |
[INFO] [stdout] 126 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:135:17
[INFO] [stdout]     |
[INFO] [stdout] 135 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:160:17
[INFO] [stdout]     |
[INFO] [stdout] 160 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:169:17
[INFO] [stdout]     |
[INFO] [stdout] 169 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:170:17
[INFO] [stdout]     |
[INFO] [stdout] 170 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:180:17
[INFO] [stdout]     |
[INFO] [stdout] 180 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:190:17
[INFO] [stdout]     |
[INFO] [stdout] 190 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:199:17
[INFO] [stdout]     |
[INFO] [stdout] 199 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:209:17
[INFO] [stdout]     |
[INFO] [stdout] 209 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:210:17
[INFO] [stdout]     |
[INFO] [stdout] 210 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:219:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |       let lhs = try!(execute(ctx, &*l));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 220 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/executor.rs:229:17
[INFO] [stdout]     |
[INFO] [stdout] 229 |       let rhs = try!(execute(ctx, &*r));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Err(f) => { panic!(f.to_string()) }
[INFO] [stdout]    |                        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Err(f) => { panic!("{}", f.to_string()) }
[INFO] [stdout]    |                        ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Err(f) => { std::panic::panic_any(f.to_string()) }
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Err(f) => { panic!(f.to_string()) }
[INFO] [stdout]    |                        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Err(f) => { panic!("{}", f.to_string()) }
[INFO] [stdout]    |                        ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Err(f) => { std::panic::panic_any(f.to_string()) }
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.09s
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2329ade1ec7a54ed37259bda8cda3fdd3541fa787f0713f3c2de2cd31b9f4e54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2329ade1ec7a54ed37259bda8cda3fdd3541fa787f0713f3c2de2cd31b9f4e54", kill_on_drop: false }`
[INFO] [stdout] 2329ade1ec7a54ed37259bda8cda3fdd3541fa787f0713f3c2de2cd31b9f4e54