[INFO] cloning repository https://github.com/mwolicki/mlisp_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mwolicki/mlisp_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmwolicki%2Fmlisp_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmwolicki%2Fmlisp_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 103fb4a30b0175fec4714bb69cc9a88fbbc2beca
[INFO] checking mwolicki/mlisp_rust against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmwolicki%2Fmlisp_rust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mwolicki/mlisp_rust on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mwolicki/mlisp_rust
[INFO] finished tweaking git repo https://github.com/mwolicki/mlisp_rust
[INFO] tweaked toml for git repo https://github.com/mwolicki/mlisp_rust written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/mwolicki/mlisp_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e94b383b25e43aa92dceafce0124c3306ad6136270cfe5a429b14041e700fc7a
[INFO] running `Command { std: "docker" "start" "-a" "e94b383b25e43aa92dceafce0124c3306ad6136270cfe5a429b14041e700fc7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e94b383b25e43aa92dceafce0124c3306ad6136270cfe5a429b14041e700fc7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e94b383b25e43aa92dceafce0124c3306ad6136270cfe5a429b14041e700fc7a", kill_on_drop: false }`
[INFO] [stdout] e94b383b25e43aa92dceafce0124c3306ad6136270cfe5a429b14041e700fc7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21d0d125f898c058537584a0a799e6e3f2a63b803046ac02a8e508126a0ae941
[INFO] running `Command { std: "docker" "start" "-a" "21d0d125f898c058537584a0a799e6e3f2a63b803046ac02a8e508126a0ae941", kill_on_drop: false }`
[INFO] [stderr]     Checking mlisp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser_combinators.rs:210:31
[INFO] [stdout]     |
[INFO] [stdout] 210 | pub type RcParser<'a, R> = Rc<Parser<'a, Return = R> + 'a>;
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Parser<'a, Return = R> + 'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `parser::parse`
[INFO] [stdout]  --> src/eval.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use parser::parse;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/eval.rs:100:18
[INFO] [stdout]     |
[INFO] [stdout] 100 |                 };
[INFO] [stdout]     |                  ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser_combinators.rs:210:31
[INFO] [stdout]     |
[INFO] [stdout] 210 | pub type RcParser<'a, R> = Rc<Parser<'a, Return = R> + 'a>;
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Parser<'a, Return = R> + 'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/eval.rs:100:18
[INFO] [stdout]     |
[INFO] [stdout] 100 |                 };
[INFO] [stdout]     |                  ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `p_str`
[INFO] [stdout]   --> src/parser_combinators.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn p_str<'a>(string: &'a str) -> RcParser<'a, &str> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `p_str`
[INFO] [stdout]   --> src/parser_combinators.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn p_str<'a>(string: &'a str) -> RcParser<'a, &str> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "21d0d125f898c058537584a0a799e6e3f2a63b803046ac02a8e508126a0ae941", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21d0d125f898c058537584a0a799e6e3f2a63b803046ac02a8e508126a0ae941", kill_on_drop: false }`
[INFO] [stdout] 21d0d125f898c058537584a0a799e6e3f2a63b803046ac02a8e508126a0ae941