[INFO] cloning repository https://github.com/shengg-ww/interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shengg-ww/interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshengg-ww%2Finterpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshengg-ww%2Finterpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6a4f47fb7c3c15d689a772d708410de17282b082
[INFO] checking shengg-ww/interpreter against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshengg-ww%2Finterpreter" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/shengg-ww/interpreter
[INFO] finished tweaking git repo https://github.com/shengg-ww/interpreter
[INFO] tweaked toml for git repo https://github.com/shengg-ww/interpreter written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/shengg-ww/interpreter on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/shengg-ww/interpreter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcc4cc074e2acc4a35b6d7db0cb448e3b507ce104d247ad93b56505c87ed7610
[INFO] running `Command { std: "docker" "start" "-a" "dcc4cc074e2acc4a35b6d7db0cb448e3b507ce104d247ad93b56505c87ed7610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcc4cc074e2acc4a35b6d7db0cb448e3b507ce104d247ad93b56505c87ed7610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc4cc074e2acc4a35b6d7db0cb448e3b507ce104d247ad93b56505c87ed7610", kill_on_drop: false }`
[INFO] [stdout] dcc4cc074e2acc4a35b6d7db0cb448e3b507ce104d247ad93b56505c87ed7610
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fd3dd068806a70ecfbdbb75fae5ef058c51226e647d55753cbe2d59a258444d
[INFO] running `Command { std: "docker" "start" "-a" "4fd3dd068806a70ecfbdbb75fae5ef058c51226e647d55753cbe2d59a258444d", kill_on_drop: false }`
[INFO] [stderr]     Checking interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/parser.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |     else if let Ok(s) = token.parse:: <String> (){
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `List` is never constructed
[INFO] [stdout]   --> src/lexer.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum FlareLangExp {
[INFO] [stdout]    |          ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 15 |   List(Vec<FlareLangExp>),
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FlareLangExp` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_seq` is never used
[INFO] [stdout]  --> src/parser.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn read_seq<'a>(tokens: &'a [String]) -> Result<(FlareLangExp, &'a [String]), FlareLangErr> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/parser.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |     else if let Ok(s) = token.parse:: <String> (){
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `List` is never constructed
[INFO] [stdout]   --> src/lexer.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum FlareLangExp {
[INFO] [stdout]    |          ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 15 |   List(Vec<FlareLangExp>),
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FlareLangExp` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_seq` is never used
[INFO] [stdout]  --> src/parser.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn read_seq<'a>(tokens: &'a [String]) -> Result<(FlareLangExp, &'a [String]), FlareLangErr> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "4fd3dd068806a70ecfbdbb75fae5ef058c51226e647d55753cbe2d59a258444d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd3dd068806a70ecfbdbb75fae5ef058c51226e647d55753cbe2d59a258444d", kill_on_drop: false }`
[INFO] [stdout] 4fd3dd068806a70ecfbdbb75fae5ef058c51226e647d55753cbe2d59a258444d