[INFO] cloning repository https://github.com/Yichangcs/Ruscheme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yichangcs/Ruscheme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYichangcs%2FRuscheme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYichangcs%2FRuscheme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72e78c39f2c56b6a64ab515c03289a0e7c9ea420
[INFO] testing Yichangcs/Ruscheme against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYichangcs%2FRuscheme" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yichangcs/Ruscheme 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/Yichangcs/Ruscheme
[INFO] finished tweaking git repo https://github.com/Yichangcs/Ruscheme
[INFO] tweaked toml for git repo https://github.com/Yichangcs/Ruscheme written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Yichangcs/Ruscheme 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] e51bfecbb9f4f24ccbec564d44b0cbf1213c721b798b3e2e189ed07c9ab801a5
[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" "e51bfecbb9f4f24ccbec564d44b0cbf1213c721b798b3e2e189ed07c9ab801a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e51bfecbb9f4f24ccbec564d44b0cbf1213c721b798b3e2e189ed07c9ab801a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e51bfecbb9f4f24ccbec564d44b0cbf1213c721b798b3e2e189ed07c9ab801a5", kill_on_drop: false }`
[INFO] [stdout] e51bfecbb9f4f24ccbec564d44b0cbf1213c721b798b3e2e189ed07c9ab801a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] e604afcd6987f53b5e8a1735714be3b1f89ed15166c0ec41a99c7d6c8f0ee8ee
[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" "e604afcd6987f53b5e8a1735714be3b1f89ed15166c0ec41a99c7d6c8f0ee8ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruscheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "e604afcd6987f53b5e8a1735714be3b1f89ed15166c0ec41a99c7d6c8f0ee8ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e604afcd6987f53b5e8a1735714be3b1f89ed15166c0ec41a99c7d6c8f0ee8ee", kill_on_drop: false }`
[INFO] [stdout] e604afcd6987f53b5e8a1735714be3b1f89ed15166c0ec41a99c7d6c8f0ee8ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] b3c82e215715e8e6bbe67974af7423fd67c1cb69d6b08bed0bc9a6f8e899827f
[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" "b3c82e215715e8e6bbe67974af7423fd67c1cb69d6b08bed0bc9a6f8e899827f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ruscheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `display::display::pretty_print`
[INFO] [stdout]    --> src/parser.rs:216:17
[INFO] [stdout]     |
[INFO] [stdout] 216 |     use crate::{display::display::pretty_print, scheme_list};
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tokens` is never read
[INFO] [stdout]    --> src/parser.rs:233:17
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let mut tokens: Vec<String> = vec![];
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ss` is never read
[INFO] [stdout]    --> src/parser.rs:240:17
[INFO] [stdout]     |
[INFO] [stdout] 240 |         let mut ss: Vec<String> = vec![];
[INFO] [stdout]     |                 ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tokens` is never read
[INFO] [stdout]    --> src/parser.rs:256:17
[INFO] [stdout]     |
[INFO] [stdout] 256 |         let mut tokens: Vec<String> = vec![];
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/core_of_interpreter.rs:577:13
[INFO] [stdout]     |
[INFO] [stdout] 577 | /             eval(
[INFO] [stdout] 578 | |                 scheme_list!(
[INFO] [stdout] 579 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 580 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 583 | |                 ENV.clone(),
[INFO] [stdout] 584 | |             );
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/core_of_interpreter.rs:597:13
[INFO] [stdout]     |
[INFO] [stdout] 597 | /             eval(
[INFO] [stdout] 598 | |                 scheme_list!(
[INFO] [stdout] 599 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 600 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 603 | |                 ENV.clone(),
[INFO] [stdout] 604 | |             );
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/core_of_interpreter.rs:623:13
[INFO] [stdout]     |
[INFO] [stdout] 623 | /             eval(
[INFO] [stdout] 624 | |                 scheme_list!(
[INFO] [stdout] 625 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 626 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 629 | |                 ENV.clone(),
[INFO] [stdout] 630 | |             );
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/core_of_interpreter.rs:674:13
[INFO] [stdout]     |
[INFO] [stdout] 674 | /             eval(
[INFO] [stdout] 675 | |                 scheme_list!(
[INFO] [stdout] 676 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 677 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 680 | |                 ENV.clone(),
[INFO] [stdout] 681 | |             );
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/core_of_interpreter.rs:724:13
[INFO] [stdout]     |
[INFO] [stdout] 724 | /             eval(
[INFO] [stdout] 725 | |                 scheme_list!(
[INFO] [stdout] 726 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 727 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 730 | |                 ENV.clone(),
[INFO] [stdout] 731 | |             );
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:220:9
[INFO] [stdout]     |
[INFO] [stdout] 220 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:234:9
[INFO] [stdout]     |
[INFO] [stdout] 234 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:248:9
[INFO] [stdout]     |
[INFO] [stdout] 248 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:257:9
[INFO] [stdout]     |
[INFO] [stdout] 257 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 21.34s
[INFO] running `Command { std: "docker" "inspect" "b3c82e215715e8e6bbe67974af7423fd67c1cb69d6b08bed0bc9a6f8e899827f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3c82e215715e8e6bbe67974af7423fd67c1cb69d6b08bed0bc9a6f8e899827f", kill_on_drop: false }`
[INFO] [stdout] b3c82e215715e8e6bbe67974af7423fd67c1cb69d6b08bed0bc9a6f8e899827f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 45a46dc05d42015200abcde4fd39b425ea02fa1637ff905d7f4a4101e4aa5517
[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" "45a46dc05d42015200abcde4fd39b425ea02fa1637ff905d7f4a4101e4aa5517", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `display::display::pretty_print`
[INFO] [stderr]    --> src/parser.rs:216:17
[INFO] [stderr]     |
[INFO] [stderr] 216 |     use crate::{display::display::pretty_print, scheme_list};
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tokens` is never read
[INFO] [stderr]    --> src/parser.rs:233:17
[INFO] [stderr]     |
[INFO] [stderr] 233 |         let mut tokens: Vec<String> = vec![];
[INFO] [stderr]     |                 ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `ss` is never read
[INFO] [stderr]    --> src/parser.rs:240:17
[INFO] [stderr]     |
[INFO] [stderr] 240 |         let mut ss: Vec<String> = vec![];
[INFO] [stderr]     |                 ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tokens` is never read
[INFO] [stderr]    --> src/parser.rs:256:17
[INFO] [stderr]     |
[INFO] [stderr] 256 |         let mut tokens: Vec<String> = vec![];
[INFO] [stderr]     |                 ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/core_of_interpreter.rs:577:13
[INFO] [stderr]     |
[INFO] [stderr] 577 | /             eval(
[INFO] [stderr] 578 | |                 scheme_list!(
[INFO] [stderr] 579 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 580 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 583 | |                 ENV.clone(),
[INFO] [stderr] 584 | |             );
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/core_of_interpreter.rs:597:13
[INFO] [stderr]     |
[INFO] [stderr] 597 | /             eval(
[INFO] [stderr] 598 | |                 scheme_list!(
[INFO] [stderr] 599 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 600 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 603 | |                 ENV.clone(),
[INFO] [stderr] 604 | |             );
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/core_of_interpreter.rs:623:13
[INFO] [stderr]     |
[INFO] [stderr] 623 | /             eval(
[INFO] [stderr] 624 | |                 scheme_list!(
[INFO] [stderr] 625 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 626 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 629 | |                 ENV.clone(),
[INFO] [stderr] 630 | |             );
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/core_of_interpreter.rs:674:13
[INFO] [stderr]     |
[INFO] [stderr] 674 | /             eval(
[INFO] [stderr] 675 | |                 scheme_list!(
[INFO] [stderr] 676 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 677 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 680 | |                 ENV.clone(),
[INFO] [stderr] 681 | |             );
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/core_of_interpreter.rs:724:13
[INFO] [stderr]     |
[INFO] [stderr] 724 | /             eval(
[INFO] [stderr] 725 | |                 scheme_list!(
[INFO] [stderr] 726 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 727 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 730 | |                 ENV.clone(),
[INFO] [stderr] 731 | |             );
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/parser.rs:220:9
[INFO] [stderr]     |
[INFO] [stderr] 220 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/parser.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/parser.rs:248:9
[INFO] [stderr]     |
[INFO] [stderr] 248 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/parser.rs:257:9
[INFO] [stderr]     |
[INFO] [stderr] 257 |         read_scheme_programs_from_file(&mut programs);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ruscheme-2db1b01f8d5d00ba)
[INFO] [stdout] 
[INFO] [stdout] running 37 tests
[INFO] [stdout] test core_of_interpreter::test::test_eval_self_evaluating_exp ... ok
[INFO] [stdout] test environment::test::test_lookup_variable_value ... ok
[INFO] [stderr] free(): double free detected in tcache 2
[INFO] [stderr] error: test failed, to rerun pass '--bin ruscheme'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/ruscheme-2db1b01f8d5d00ba` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "45a46dc05d42015200abcde4fd39b425ea02fa1637ff905d7f4a4101e4aa5517", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45a46dc05d42015200abcde4fd39b425ea02fa1637ff905d7f4a4101e4aa5517", kill_on_drop: false }`
[INFO] [stdout] 45a46dc05d42015200abcde4fd39b425ea02fa1637ff905d7f4a4101e4aa5517