[INFO] cloning repository https://github.com/tuxxi/Risp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tuxxi/Risp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftuxxi%2FRisp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftuxxi%2FRisp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 150af8f63e3774ba5e459db174093b517184d13b
[INFO] checking tuxxi/Risp against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftuxxi%2FRisp" "/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/tuxxi/Risp 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/tuxxi/Risp
[INFO] finished tweaking git repo https://github.com/tuxxi/Risp
[INFO] tweaked toml for git repo https://github.com/tuxxi/Risp written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/tuxxi/Risp 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] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2e47fd57713cb4f7e4a8643adec4d869804830c211f0b9e052a521d40bd6332
[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" "d2e47fd57713cb4f7e4a8643adec4d869804830c211f0b9e052a521d40bd6332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2e47fd57713cb4f7e4a8643adec4d869804830c211f0b9e052a521d40bd6332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2e47fd57713cb4f7e4a8643adec4d869804830c211f0b9e052a521d40bd6332", kill_on_drop: false }`
[INFO] [stdout] d2e47fd57713cb4f7e4a8643adec4d869804830c211f0b9e052a521d40bd6332
[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" "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] 358bad8c12f42e9752dfea0b9129d6ae1b001299de5e526b3a41c46dd6dd6a55
[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" "358bad8c12f42e9752dfea0b9129d6ae1b001299de5e526b3a41c46dd6dd6a55", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rustyline v6.0.0
[INFO] [stderr]     Checking risp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/parse.rs:97:18
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn get_string<T>(c: char, iter: &mut Peekable<T>) -> Token
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Builtin`
[INFO] [stdout]  --> src/expr.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Builtin(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Boolean`
[INFO] [stdout]  --> src/expr.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Boolean(bool),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Char`
[INFO] [stdout]  --> src/expr.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Char(u8),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Number`
[INFO] [stdout]   --> src/expr.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Number(f64),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Str`
[INFO] [stdout]   --> src/expr.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Str(String),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Symbol`
[INFO] [stdout]   --> src/expr.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Symbol(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Atom`
[INFO] [stdout]   --> src/expr.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Atom(Atom),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SExpr`
[INFO] [stdout]   --> src/expr.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     SExpr(List<SExpr>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/list.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cons`
[INFO] [stdout]   --> src/list.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn cons(&self, elem: T) -> Self { 
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/list.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn tail(&self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `head`
[INFO] [stdout]   --> src/list.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn head(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `nil`
[INFO] [stdout]   --> src/list.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn nil() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LParen`
[INFO] [stdout]  --> src/parse.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     LParen,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RParen`
[INFO] [stdout]  --> src/parse.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     RParen,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quasiquote`
[INFO] [stdout]  --> src/parse.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Quasiquote,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unquote`
[INFO] [stdout]   --> src/parse.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Unquote,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Atom`
[INFO] [stdout]   --> src/parse.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Atom(Atom),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `lex`
[INFO] [stdout]   --> src/parse.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn lex(input: &String) -> Result<Vec<Token>, String> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_paren`
[INFO] [stdout]   --> src/parse.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn is_paren(c: char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_number`
[INFO] [stdout]   --> src/parse.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn get_number<T>(c: char, iter: &mut Peekable<T>) -> Token
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_string`
[INFO] [stdout]   --> src/parse.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn get_string<T>(c: char, iter: &mut Peekable<T>) -> Token
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_symbol`
[INFO] [stdout]    --> src/parse.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn get_symbol<T>(c: char, iter: &mut Peekable<T>) -> Token
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/parse.rs:97:18
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn get_string<T>(c: char, iter: &mut Peekable<T>) -> Token
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Boolean`
[INFO] [stdout]  --> src/expr.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Boolean(bool),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Char`
[INFO] [stdout]  --> src/expr.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Char(u8),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `nil`
[INFO] [stdout]   --> src/list.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn nil() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.64s
[INFO] running `Command { std: "docker" "inspect" "358bad8c12f42e9752dfea0b9129d6ae1b001299de5e526b3a41c46dd6dd6a55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "358bad8c12f42e9752dfea0b9129d6ae1b001299de5e526b3a41c46dd6dd6a55", kill_on_drop: false }`
[INFO] [stdout] 358bad8c12f42e9752dfea0b9129d6ae1b001299de5e526b3a41c46dd6dd6a55