[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] d9456af5f880ee3b5ee8600412a55173b489e3e8
[INFO] testing Yichangcs/Ruscheme against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYichangcs%2FRuscheme" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yichangcs/Ruscheme on toolchain fc4ba03ef77ca5018fb78a097d3b924d30f15bfc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "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-1/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" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be14fa4412e7ffd8ef69f395fa5dfa0d1dd49e16f90307543390c6529dc4cd22
[INFO] running `Command { std: "docker" "start" "-a" "be14fa4412e7ffd8ef69f395fa5dfa0d1dd49e16f90307543390c6529dc4cd22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be14fa4412e7ffd8ef69f395fa5dfa0d1dd49e16f90307543390c6529dc4cd22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be14fa4412e7ffd8ef69f395fa5dfa0d1dd49e16f90307543390c6529dc4cd22", kill_on_drop: false }`
[INFO] [stdout] be14fa4412e7ffd8ef69f395fa5dfa0d1dd49e16f90307543390c6529dc4cd22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "build" "--frozen" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 5b7d8fc3df515f175f9341f5142b70387b22d9105411d932a116c7dec2fca97b
[INFO] running `Command { std: "docker" "start" "-a" "5b7d8fc3df515f175f9341f5142b70387b22d9105411d932a116c7dec2fca97b", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruscheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "5b7d8fc3df515f175f9341f5142b70387b22d9105411d932a116c7dec2fca97b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b7d8fc3df515f175f9341f5142b70387b22d9105411d932a116c7dec2fca97b", kill_on_drop: false }`
[INFO] [stdout] 5b7d8fc3df515f175f9341f5142b70387b22d9105411d932a116c7dec2fca97b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--no-run" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 28983ebde355535147789dd462a4baf739fc21d2271da64f7993f23f62410f22
[INFO] running `Command { std: "docker" "start" "-a" "28983ebde355535147789dd462a4baf739fc21d2271da64f7993f23f62410f22", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruscheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `display::display::pretty_print`
[INFO] [stdout]    --> src/parser.rs:284:17
[INFO] [stdout]     |
[INFO] [stdout] 284 |     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:301:17
[INFO] [stdout]     |
[INFO] [stdout] 301 |         let mut tokens: Vec<String> = vec![];
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ss` is never read
[INFO] [stdout]    --> src/parser.rs:308:17
[INFO] [stdout]     |
[INFO] [stdout] 308 |         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:324:17
[INFO] [stdout]     |
[INFO] [stdout] 324 |         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:520:13
[INFO] [stdout]     |
[INFO] [stdout] 520 | /             eval(
[INFO] [stdout] 521 | |                 scheme_list!(
[INFO] [stdout] 522 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 523 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 526 | |                 ENV.clone(),
[INFO] [stdout] 527 | |             );
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/core_of_interpreter.rs:540:13
[INFO] [stdout]     |
[INFO] [stdout] 540 | /             eval(
[INFO] [stdout] 541 | |                 scheme_list!(
[INFO] [stdout] 542 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 543 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 546 | |                 ENV.clone(),
[INFO] [stdout] 547 | |             );
[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:566:13
[INFO] [stdout]     |
[INFO] [stdout] 566 | /             eval(
[INFO] [stdout] 567 | |                 scheme_list!(
[INFO] [stdout] 568 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 569 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 572 | |                 ENV.clone(),
[INFO] [stdout] 573 | |             );
[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:617:13
[INFO] [stdout]     |
[INFO] [stdout] 617 | /             eval(
[INFO] [stdout] 618 | |                 scheme_list!(
[INFO] [stdout] 619 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 620 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 623 | |                 ENV.clone(),
[INFO] [stdout] 624 | |             );
[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:667:13
[INFO] [stdout]     |
[INFO] [stdout] 667 | /             eval(
[INFO] [stdout] 668 | |                 scheme_list!(
[INFO] [stdout] 669 | |                     Exp::Symbol("define".to_string()),
[INFO] [stdout] 670 | |                     Exp::Symbol("x".to_string()),
[INFO] [stdout] ...   |
[INFO] [stdout] 673 | |                 ENV.clone(),
[INFO] [stdout] 674 | |             );
[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:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         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:302:9
[INFO] [stdout]     |
[INFO] [stdout] 302 |         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:316:9
[INFO] [stdout]     |
[INFO] [stdout] 316 |         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:325:9
[INFO] [stdout]     |
[INFO] [stdout] 325 |         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 0.66s
[INFO] running `Command { std: "docker" "inspect" "28983ebde355535147789dd462a4baf739fc21d2271da64f7993f23f62410f22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28983ebde355535147789dd462a4baf739fc21d2271da64f7993f23f62410f22", kill_on_drop: false }`
[INFO] [stdout] 28983ebde355535147789dd462a4baf739fc21d2271da64f7993f23f62410f22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 9a18581fd33939508fb10c3244b2a98a6ef487a05c5305d654cea1fb0c6dcae9
[INFO] running `Command { std: "docker" "start" "-a" "9a18581fd33939508fb10c3244b2a98a6ef487a05c5305d654cea1fb0c6dcae9", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `display::display::pretty_print`
[INFO] [stderr]    --> src/parser.rs:284:17
[INFO] [stderr]     |
[INFO] [stderr] 284 |     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:301:17
[INFO] [stderr]     |
[INFO] [stderr] 301 |         let mut tokens: Vec<String> = vec![];
[INFO] [stderr]     |                 ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `ss` is never read
[INFO] [stderr]    --> src/parser.rs:308:17
[INFO] [stderr]     |
[INFO] [stderr] 308 |         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:324:17
[INFO] [stderr]     |
[INFO] [stderr] 324 |         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:520:13
[INFO] [stderr]     |
[INFO] [stderr] 520 | /             eval(
[INFO] [stderr] 521 | |                 scheme_list!(
[INFO] [stderr] 522 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 523 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 526 | |                 ENV.clone(),
[INFO] [stderr] 527 | |             );
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/core_of_interpreter.rs:540:13
[INFO] [stderr]     |
[INFO] [stderr] 540 | /             eval(
[INFO] [stderr] 541 | |                 scheme_list!(
[INFO] [stderr] 542 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 543 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 546 | |                 ENV.clone(),
[INFO] [stderr] 547 | |             );
[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:566:13
[INFO] [stderr]     |
[INFO] [stderr] 566 | /             eval(
[INFO] [stderr] 567 | |                 scheme_list!(
[INFO] [stderr] 568 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 569 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 572 | |                 ENV.clone(),
[INFO] [stderr] 573 | |             );
[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:617:13
[INFO] [stderr]     |
[INFO] [stderr] 617 | /             eval(
[INFO] [stderr] 618 | |                 scheme_list!(
[INFO] [stderr] 619 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 620 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 623 | |                 ENV.clone(),
[INFO] [stderr] 624 | |             );
[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:667:13
[INFO] [stderr]     |
[INFO] [stderr] 667 | /             eval(
[INFO] [stderr] 668 | |                 scheme_list!(
[INFO] [stderr] 669 | |                     Exp::Symbol("define".to_string()),
[INFO] [stderr] 670 | |                     Exp::Symbol("x".to_string()),
[INFO] [stderr] ...   |
[INFO] [stderr] 673 | |                 ENV.clone(),
[INFO] [stderr] 674 | |             );
[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:288:9
[INFO] [stderr]     |
[INFO] [stderr] 288 |         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:302:9
[INFO] [stderr]     |
[INFO] [stderr] 302 |         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:316:9
[INFO] [stderr]     |
[INFO] [stderr] 316 |         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:325:9
[INFO] [stderr]     |
[INFO] [stderr] 325 |         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: `ruscheme` (bin "ruscheme" test) generated 13 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/ruscheme-6ee130af018d0742)
[INFO] [stdout] 
[INFO] [stdout] running 37 tests
[INFO] [stdout] test core_of_interpreter::test::test_eval_assignment ... ok
[INFO] [stdout] test core_of_interpreter::test::test_eval_self_evaluating_exp ... ok
[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/i686-unknown-linux-musl/debug/deps/ruscheme-6ee130af018d0742` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "9a18581fd33939508fb10c3244b2a98a6ef487a05c5305d654cea1fb0c6dcae9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a18581fd33939508fb10c3244b2a98a6ef487a05c5305d654cea1fb0c6dcae9", kill_on_drop: false }`
[INFO] [stdout] 9a18581fd33939508fb10c3244b2a98a6ef487a05c5305d654cea1fb0c6dcae9