[INFO] cloning repository https://github.com/mathlet/lisp-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mathlet/lisp-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathlet%2Flisp-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathlet%2Flisp-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ad46239caaf87b0783cbb0344c37b54e1df9fee
[INFO] checking mathlet/lisp-rs against try#3f7b27fe41ccd116a4c0829bd9a14b65bada4578 for pr-96970
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathlet%2Flisp-rs" "/workspace/builds/worker-67/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-67/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mathlet/lisp-rs on toolchain 3f7b27fe41ccd116a4c0829bd9a14b65bada4578
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3f7b27fe41ccd116a4c0829bd9a14b65bada4578" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mathlet/lisp-rs
[INFO] finished tweaking git repo https://github.com/mathlet/lisp-rs
[INFO] tweaked toml for git repo https://github.com/mathlet/lisp-rs written to /workspace/builds/worker-67/source/Cargo.toml
[INFO] crate git repo https://github.com/mathlet/lisp-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3f7b27fe41ccd116a4c0829bd9a14b65bada4578" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+3f7b27fe41ccd116a4c0829bd9a14b65bada4578" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 899792dc66eb053dabe00a6a23b77744f4d0b0a8a9c132096aed5e8fd9840b98
[INFO] running `Command { std: "docker" "start" "-a" "899792dc66eb053dabe00a6a23b77744f4d0b0a8a9c132096aed5e8fd9840b98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "899792dc66eb053dabe00a6a23b77744f4d0b0a8a9c132096aed5e8fd9840b98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "899792dc66eb053dabe00a6a23b77744f4d0b0a8a9c132096aed5e8fd9840b98", kill_on_drop: false }`
[INFO] [stdout] 899792dc66eb053dabe00a6a23b77744f4d0b0a8a9c132096aed5e8fd9840b98
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+3f7b27fe41ccd116a4c0829bd9a14b65bada4578" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b35deab57d98c35f6e4b9a19ade68216c76c11cf94c5229dcc9dfa5c89e29676
[INFO] running `Command { std: "docker" "start" "-a" "b35deab57d98c35f6e4b9a19ade68216c76c11cf94c5229dcc9dfa5c89e29676", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking unindent v0.1.9
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking lisp-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::token::TokenKind::Number`
[INFO] [stdout]  --> src/lexer/rules.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::token::TokenKind::Number;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::token::TokenKind::Number`
[INFO] [stdout]  --> src/lexer/rules.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::token::TokenKind::Number;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenKind`
[INFO] [stdout]  --> src/parser/sexpr.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::token::{Token, TokenKind};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenKind`
[INFO] [stdout]  --> src/parser/sexpr.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::token::{Token, TokenKind};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lexer::Lexer`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::lexer::Lexer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lexer::Lexer`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::lexer::Lexer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/parser/env.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut data: HashMap<String, Sexpr> = HashMap::new();
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut input = fs::read_to_string(format!(
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut ast = parser.parse();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/parser/env.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut data: HashMap<String, Sexpr> = HashMap::new();
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut input = fs::read_to_string(format!(
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut ast = parser.parse();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]    --> src/token.rs:171:12
[INFO] [stdout]     |
[INFO] [stdout] 171 |     pub fn len(&self) -> usize {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tokenize`
[INFO] [stdout]   --> src/lexer/mod.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn tokenize(&mut self) -> Vec<Token> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_single_char`
[INFO] [stdout]   --> src/lexer/rules.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn match_single_char(input: &str, c: char) -> Option<u32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `at`
[INFO] [stdout]   --> src/parser/mod.rs:60:19
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub(crate) fn at(&mut self, kind: TokenKind) -> bool {
[INFO] [stdout]    |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `consume`
[INFO] [stdout]   --> src/parser/mod.rs:71:19
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub(crate) fn consume(&mut self, expected: TokenKind) {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Env`
[INFO] [stdout]  --> src/parser/env.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Env {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `default_env`
[INFO] [stdout]  --> src/parser/env.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn default_env() -> Env {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]    --> src/token.rs:171:12
[INFO] [stdout]     |
[INFO] [stdout] 171 |     pub fn len(&self) -> usize {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tokenize`
[INFO] [stdout]   --> src/lexer/mod.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn tokenize(&mut self) -> Vec<Token> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_single_char`
[INFO] [stdout]   --> src/lexer/rules.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn match_single_char(input: &str, c: char) -> Option<u32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `at`
[INFO] [stdout]   --> src/parser/mod.rs:60:19
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub(crate) fn at(&mut self, kind: TokenKind) -> bool {
[INFO] [stdout]    |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `consume`
[INFO] [stdout]   --> src/parser/mod.rs:71:19
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub(crate) fn consume(&mut self, expected: TokenKind) {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Env`
[INFO] [stdout]  --> src/parser/env.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Env {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `default_env`
[INFO] [stdout]  --> src/parser/env.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn default_env() -> Env {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.40s
[INFO] running `Command { std: "docker" "inspect" "b35deab57d98c35f6e4b9a19ade68216c76c11cf94c5229dcc9dfa5c89e29676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b35deab57d98c35f6e4b9a19ade68216c76c11cf94c5229dcc9dfa5c89e29676", kill_on_drop: false }`
[INFO] [stdout] b35deab57d98c35f6e4b9a19ade68216c76c11cf94c5229dcc9dfa5c89e29676