[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] 6f5a7a70181bdec1a9dab4ead63b2cc0d296a8bb
[INFO] checking Yichangcs/Ruscheme against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYichangcs%2FRuscheme" "/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/Yichangcs/Ruscheme on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", 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-8/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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74730815bac56856272946658e5f257c16f0112555d766bb320ca6ec232b666d
[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" "74730815bac56856272946658e5f257c16f0112555d766bb320ca6ec232b666d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74730815bac56856272946658e5f257c16f0112555d766bb320ca6ec232b666d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74730815bac56856272946658e5f257c16f0112555d766bb320ca6ec232b666d", kill_on_drop: false }`
[INFO] [stdout] 74730815bac56856272946658e5f257c16f0112555d766bb320ca6ec232b666d
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c0294d185040a47e5dca896753f167c3ca9c5030aacf56d8bedf2c33769ad4c
[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" "6c0294d185040a47e5dca896753f167c3ca9c5030aacf56d8bedf2c33769ad4c", 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] [stderr]     Checking ruscheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/lib.rs:109:23
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn eval(exp: Exp, env: Env) -> Result<Exp, &'static str> {Ok(exp)}
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/lib.rs:111:14
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn apply(p: Procedure, args: Exp) -> Result<Exp, &'static str> {Ok(args)}
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:169:26
[INFO] [stdout]     |
[INFO] [stdout] 169 |         pub fn is_tagged(exp: &Exp, tag: &'static str) -> bool { true }
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]    --> src/lib.rs:169:37
[INFO] [stdout]     |
[INFO] [stdout] 169 |         pub fn is_tagged(exp: &Exp, tag: &'static str) -> bool { true }
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:171:30
[INFO] [stdout]     |
[INFO] [stdout] 171 |         pub fn is_assignment(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                              ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:173:29
[INFO] [stdout]     |
[INFO] [stdout] 173 |         pub fn is_definiton(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:175:26
[INFO] [stdout]     |
[INFO] [stdout] 175 |         pub fn is_lambda(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:177:22
[INFO] [stdout]     |
[INFO] [stdout] 177 |         pub fn is_if(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:179:25
[INFO] [stdout]     |
[INFO] [stdout] 179 |         pub fn is_begin(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:181:31
[INFO] [stdout]     |
[INFO] [stdout] 181 |         pub fn is_application(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                               ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:183:24
[INFO] [stdout]     |
[INFO] [stdout] 183 |         pub fn is_cond(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lib.rs:273:42
[INFO] [stdout]     |
[INFO] [stdout] 273 |     pub fn assemble_abstract_syntax_tree(v: &Vec<String>) -> Exp {
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/lib.rs:109:23
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn eval(exp: Exp, env: Env) -> Result<Exp, &'static str> {Ok(exp)}
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/lib.rs:111:14
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn apply(p: Procedure, args: Exp) -> Result<Exp, &'static str> {Ok(args)}
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:169:26
[INFO] [stdout]     |
[INFO] [stdout] 169 |         pub fn is_tagged(exp: &Exp, tag: &'static str) -> bool { true }
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]    --> src/lib.rs:169:37
[INFO] [stdout]     |
[INFO] [stdout] 169 |         pub fn is_tagged(exp: &Exp, tag: &'static str) -> bool { true }
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:171:30
[INFO] [stdout]     |
[INFO] [stdout] 171 |         pub fn is_assignment(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                              ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:173:29
[INFO] [stdout]     |
[INFO] [stdout] 173 |         pub fn is_definiton(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:175:26
[INFO] [stdout]     |
[INFO] [stdout] 175 |         pub fn is_lambda(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:177:22
[INFO] [stdout]     |
[INFO] [stdout] 177 |         pub fn is_if(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:179:25
[INFO] [stdout]     |
[INFO] [stdout] 179 |         pub fn is_begin(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:181:31
[INFO] [stdout]     |
[INFO] [stdout] 181 |         pub fn is_application(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                               ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/lib.rs:183:24
[INFO] [stdout]     |
[INFO] [stdout] 183 |         pub fn is_cond(exp: &Exp) -> bool { true }
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lib.rs:273:42
[INFO] [stdout]     |
[INFO] [stdout] 273 |     pub fn assemble_abstract_syntax_tree(v: &Vec<String>) -> Exp {
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tokens` is never read
[INFO] [stdout]    --> src/lib.rs:500:13
[INFO] [stdout]     |
[INFO] [stdout] 500 |         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/lib.rs:508:13
[INFO] [stdout]     |
[INFO] [stdout] 508 |         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: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:487:9
[INFO] [stdout]     |
[INFO] [stdout] 487 |         read_scheme_programs_from_file(&mut programs);
[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 `std::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:501:9
[INFO] [stdout]     |
[INFO] [stdout] 501 |         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: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.36s
[INFO] running `Command { std: "docker" "inspect" "6c0294d185040a47e5dca896753f167c3ca9c5030aacf56d8bedf2c33769ad4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c0294d185040a47e5dca896753f167c3ca9c5030aacf56d8bedf2c33769ad4c", kill_on_drop: false }`
[INFO] [stdout] 6c0294d185040a47e5dca896753f167c3ca9c5030aacf56d8bedf2c33769ad4c