[INFO] cloning repository https://github.com/soedirgo/lox [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/soedirgo/lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsoedirgo%2Flox", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsoedirgo%2Flox'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 7b0c868222d8ca5669d2e176369bb0abd60861ab [INFO] testing soedirgo/lox against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_getrandom_patch_0 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsoedirgo%2Flox" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/soedirgo/lox [INFO] finished tweaking git repo https://github.com/soedirgo/lox [INFO] tweaked toml for git repo https://github.com/soedirgo/lox written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/soedirgo/lox on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/soedirgo/lox already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b52616038ed719e019284412705bd208c5b3ad23d0d560b2e3f7935e32e6830e [INFO] running `Command { std: "docker" "start" "-a" "b52616038ed719e019284412705bd208c5b3ad23d0d560b2e3f7935e32e6830e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b52616038ed719e019284412705bd208c5b3ad23d0d560b2e3f7935e32e6830e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b52616038ed719e019284412705bd208c5b3ad23d0d560b2e3f7935e32e6830e", kill_on_drop: false }` [INFO] [stdout] b52616038ed719e019284412705bd208c5b3ad23d0d560b2e3f7935e32e6830e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 0aa9ba3ab63c34044bdbe24a57ba41ead76081ef9b1b38aef4f4de14d5b90a2f [INFO] running `Command { std: "docker" "start" "-a" "0aa9ba3ab63c34044bdbe24a57ba41ead76081ef9b1b38aef4f4de14d5b90a2f", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.71 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling unicode-width v0.1.7 [INFO] [stderr] Compiling anyhow v1.0.31 [INFO] [stderr] Compiling vec_map v0.8.2 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling ansi_term v0.11.0 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling clap v2.33.1 [INFO] [stderr] Compiling lox v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: enum `Expr` is never used [INFO] [stdout] --> src/expr.rs:3:10 [INFO] [stdout] | [INFO] [stdout] 3 | pub enum Expr { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Literal` is never used [INFO] [stdout] --> src/expr.rs:21:10 [INFO] [stdout] | [INFO] [stdout] 21 | pub enum Literal { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Grouping` is never constructed [INFO] [stdout] --> src/expr.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub struct Grouping(Box); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Unary` is never constructed [INFO] [stdout] --> src/expr.rs:37:12 [INFO] [stdout] | [INFO] [stdout] 37 | pub struct Unary { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `UnaryOp` is never used [INFO] [stdout] --> src/expr.rs:48:10 [INFO] [stdout] | [INFO] [stdout] 48 | pub enum UnaryOp { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Binary` is never constructed [INFO] [stdout] --> src/expr.rs:53:12 [INFO] [stdout] | [INFO] [stdout] 53 | pub struct Binary { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Op` is never used [INFO] [stdout] --> src/expr.rs:65:10 [INFO] [stdout] | [INFO] [stdout] 65 | pub enum Op { [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/token.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | Str(String), [INFO] [stdout] | --- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Literal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 8 - Str(String), [INFO] [stdout] 8 + Str(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/token.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | Num(f64), [INFO] [stdout] | --- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Literal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 9 - Num(f64), [INFO] [stdout] 9 + Num(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/main.rs:43:20 [INFO] [stdout] | [INFO] [stdout] 43 | panic!(65); [INFO] [stdout] | ^^ [INFO] [stdout] | [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 [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] help: add a "{}" format string to `Display` the message [INFO] [stdout] | [INFO] [stdout] 43 | panic!("{}", 65); [INFO] [stdout] | +++++ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 43 - panic!(65); [INFO] [stdout] 43 + std::panic::panic_any(65); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.40s [INFO] running `Command { std: "docker" "inspect" "0aa9ba3ab63c34044bdbe24a57ba41ead76081ef9b1b38aef4f4de14d5b90a2f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0aa9ba3ab63c34044bdbe24a57ba41ead76081ef9b1b38aef4f4de14d5b90a2f", kill_on_drop: false }` [INFO] [stdout] 0aa9ba3ab63c34044bdbe24a57ba41ead76081ef9b1b38aef4f4de14d5b90a2f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 2c15dc037fc4c7b2a16a9e06f32d8109c0edcb8ce0331546a9e94da582952788 [INFO] running `Command { std: "docker" "start" "-a" "2c15dc037fc4c7b2a16a9e06f32d8109c0edcb8ce0331546a9e94da582952788", kill_on_drop: false }` [INFO] [stderr] Compiling lox v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: enum `Expr` is never used [INFO] [stdout] --> src/expr.rs:3:10 [INFO] [stdout] | [INFO] [stdout] 3 | pub enum Expr { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Literal` is never used [INFO] [stdout] --> src/expr.rs:21:10 [INFO] [stdout] | [INFO] [stdout] 21 | pub enum Literal { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Grouping` is never constructed [INFO] [stdout] --> src/expr.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub struct Grouping(Box); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Unary` is never constructed [INFO] [stdout] --> src/expr.rs:37:12 [INFO] [stdout] | [INFO] [stdout] 37 | pub struct Unary { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `UnaryOp` is never used [INFO] [stdout] --> src/expr.rs:48:10 [INFO] [stdout] | [INFO] [stdout] 48 | pub enum UnaryOp { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Binary` is never constructed [INFO] [stdout] --> src/expr.rs:53:12 [INFO] [stdout] | [INFO] [stdout] 53 | pub struct Binary { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Op` is never used [INFO] [stdout] --> src/expr.rs:65:10 [INFO] [stdout] | [INFO] [stdout] 65 | pub enum Op { [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/token.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | Str(String), [INFO] [stdout] | --- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Literal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 8 - Str(String), [INFO] [stdout] 8 + Str(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/token.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | Num(f64), [INFO] [stdout] | --- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Literal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 9 - Num(f64), [INFO] [stdout] 9 + Num(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/main.rs:43:20 [INFO] [stdout] | [INFO] [stdout] 43 | panic!(65); [INFO] [stdout] | ^^ [INFO] [stdout] | [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 [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] help: add a "{}" format string to `Display` the message [INFO] [stdout] | [INFO] [stdout] 43 | panic!("{}", 65); [INFO] [stdout] | +++++ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 43 - panic!(65); [INFO] [stdout] 43 + std::panic::panic_any(65); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.56s [INFO] running `Command { std: "docker" "inspect" "2c15dc037fc4c7b2a16a9e06f32d8109c0edcb8ce0331546a9e94da582952788", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2c15dc037fc4c7b2a16a9e06f32d8109c0edcb8ce0331546a9e94da582952788", kill_on_drop: false }` [INFO] [stdout] 2c15dc037fc4c7b2a16a9e06f32d8109c0edcb8ce0331546a9e94da582952788 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 540aacfa4f19836f0c0863d22630a8ffda377d9410f6f9bc0f0b315d65863218 [INFO] running `Command { std: "docker" "start" "-a" "540aacfa4f19836f0c0863d22630a8ffda377d9410f6f9bc0f0b315d65863218", kill_on_drop: false }` [INFO] [stderr] warning: enum `Expr` is never used [INFO] [stderr] --> src/expr.rs:3:10 [INFO] [stderr] | [INFO] [stderr] 3 | pub enum Expr { [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: enum `Literal` is never used [INFO] [stderr] --> src/expr.rs:21:10 [INFO] [stderr] | [INFO] [stderr] 21 | pub enum Literal { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Grouping` is never constructed [INFO] [stderr] --> src/expr.rs:29:12 [INFO] [stderr] | [INFO] [stderr] 29 | pub struct Grouping(Box); [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Unary` is never constructed [INFO] [stderr] --> src/expr.rs:37:12 [INFO] [stderr] | [INFO] [stderr] 37 | pub struct Unary { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `UnaryOp` is never used [INFO] [stderr] --> src/expr.rs:48:10 [INFO] [stderr] | [INFO] [stderr] 48 | pub enum UnaryOp { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Binary` is never constructed [INFO] [stderr] --> src/expr.rs:53:12 [INFO] [stderr] | [INFO] [stderr] 53 | pub struct Binary { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `Op` is never used [INFO] [stderr] --> src/expr.rs:65:10 [INFO] [stderr] | [INFO] [stderr] 65 | pub enum Op { [INFO] [stderr] | ^^ [INFO] [stderr] [INFO] [stderr] warning: field `0` is never read [INFO] [stderr] --> src/token.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | Str(String), [INFO] [stderr] | --- ^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | field in this variant [INFO] [stderr] | [INFO] [stderr] = note: `Literal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stderr] | [INFO] [stderr] 8 - Str(String), [INFO] [stderr] 8 + Str(()), [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: field `0` is never read [INFO] [stderr] --> src/token.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | Num(f64), [INFO] [stderr] | --- ^^^ [INFO] [stderr] | | [INFO] [stderr] | field in this variant [INFO] [stderr] | [INFO] [stderr] = note: `Literal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stderr] | [INFO] [stderr] 9 - Num(f64), [INFO] [stderr] 9 + Num(()), [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: panic message is not a string literal [INFO] [stderr] --> src/main.rs:43:20 [INFO] [stderr] | [INFO] [stderr] 43 | panic!(65); [INFO] [stderr] | ^^ [INFO] [stderr] | [INFO] [stderr] = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021 [INFO] [stderr] = note: for more information, see [INFO] [stderr] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stderr] help: add a "{}" format string to `Display` the message [INFO] [stderr] | [INFO] [stderr] 43 | panic!("{}", 65); [INFO] [stderr] | +++++ [INFO] [stderr] help: or use std::panic::panic_any instead [INFO] [stderr] | [INFO] [stderr] 43 - panic!(65); [INFO] [stderr] 43 + std::panic::panic_any(65); [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: `lox` (bin "lox" test) generated 10 warnings (run `cargo fix --bin "lox" --tests` to apply 1 suggestion) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/lox-ebc7a7777fe9b77d) [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" "540aacfa4f19836f0c0863d22630a8ffda377d9410f6f9bc0f0b315d65863218", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "540aacfa4f19836f0c0863d22630a8ffda377d9410f6f9bc0f0b315d65863218", kill_on_drop: false }` [INFO] [stdout] 540aacfa4f19836f0c0863d22630a8ffda377d9410f6f9bc0f0b315d65863218