[INFO] cloning repository https://github.com/sagarreddypatil/language
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sagarreddypatil/language" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29bd8e578ce0a93f8b5159cd7dbec5e2b3692014
[INFO] checking sagarreddypatil/language against 4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d for pr-159598
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sagarreddypatil/language
[INFO] finished tweaking git repo https://github.com/sagarreddypatil/language
[INFO] tweaked toml for git repo https://github.com/sagarreddypatil/language written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sagarreddypatil/language on toolchain 4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sagarreddypatil/language 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" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking sagarreddypatil/language against 4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d for pr-159598
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sagarreddypatil/language
[INFO] finished tweaking git repo https://github.com/sagarreddypatil/language
[INFO] tweaked toml for git repo https://github.com/sagarreddypatil/language written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sagarreddypatil/language on toolchain 4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sagarreddypatil/language 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" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded logos-derive v0.14.2
[INFO] [stderr]   Downloaded logos-codegen v0.14.2
[INFO] [stderr]   Downloaded logos v0.14.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb
[INFO] running `Command { std: "docker" "start" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb" "/opt/rustwide/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb" "/opt/rustwide/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling beef v0.5.2
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]     Checking phf_shared v0.11.2
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling logos-codegen v0.14.2
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]    Compiling logos-derive v0.14.2
[INFO] [stderr]     Checking logos v0.14.2
[INFO] [stderr]     Checking language v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::Rem`
[INFO] [stdout]  --> src/passes.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, ops::Rem};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         "&&" => (args[0] & args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -         "&&" => (args[0] & args[1]),
[INFO] [stdout] 127 +         "&&" => args[0] & args[1],
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |         "||" => (args[0] | args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 128 -         "||" => (args[0] | args[1]),
[INFO] [stdout] 128 +         "||" => args[0] | args[1],
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Rem`
[INFO] [stdout]  --> src/passes.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, ops::Rem};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         "&&" => (args[0] & args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -         "&&" => (args[0] & args[1]),
[INFO] [stdout] 127 +         "&&" => args[0] & args[1],
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |         "||" => (args[0] | args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 128 -         "||" => (args[0] | args[1]),
[INFO] [stdout] 128 +         "||" => args[0] | args[1],
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/checker.rs:312:42
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn infer_constraints_simp(&mut self, mut env: TyEnv, simp: &Simp) -> (Type, TyConstraints) {
[INFO] [stdout]     |                                          ----^^^
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 265 |             Pattern::Var(name, _) => CpsExpr::Prim {
[INFO] [stdout]     |             --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 271 |             Pattern::Int(n) => {
[INFO] [stdout]     |             --------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 296 |             Pattern::Bool(b) => {
[INFO] [stdout]     |             ---------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 301 |             Pattern::Data(data_def, tag, pats) => {
[INFO] [stdout]     |             ---------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut pass = Shrinking::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TypeDef` is never constructed
[INFO] [stdout]   --> src/ast.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct TypeDef {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]    --> src/cps.rs:154:12
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl Subst {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 154 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub fn insert(&mut self, key: Name, value: Name) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:333:12
[INFO] [stdout]     |
[INFO] [stdout] 317 | impl<Lit> CpsExpr<Lit> {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:372:12
[INFO] [stdout]     |
[INFO] [stdout] 367 | impl<Lit> CntDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 372 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:382:12
[INFO] [stdout]     |
[INFO] [stdout] 377 | impl<Lit> FunDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 382 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/checker.rs:312:42
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn infer_constraints_simp(&mut self, mut env: TyEnv, simp: &Simp) -> (Type, TyConstraints) {
[INFO] [stdout]     |                                          ----^^^
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 265 |             Pattern::Var(name, _) => CpsExpr::Prim {
[INFO] [stdout]     |             --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 271 |             Pattern::Int(n) => {
[INFO] [stdout]     |             --------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 296 |             Pattern::Bool(b) => {
[INFO] [stdout]     |             ---------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 301 |             Pattern::Data(data_def, tag, pats) => {
[INFO] [stdout]     |             ---------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut pass = Shrinking::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TypeDef` is never constructed
[INFO] [stdout]   --> src/ast.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct TypeDef {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]    --> src/cps.rs:154:12
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl Subst {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 154 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub fn insert(&mut self, key: Name, value: Name) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:333:12
[INFO] [stdout]     |
[INFO] [stdout] 317 | impl<Lit> CpsExpr<Lit> {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:372:12
[INFO] [stdout]     |
[INFO] [stdout] 367 | impl<Lit> CntDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 372 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:382:12
[INFO] [stdout]     |
[INFO] [stdout] 377 | impl<Lit> FunDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 382 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.38s
[INFO] running `Command { std: "docker" "inspect" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb", kill_on_drop: false }`
[INFO] [stdout] f142ce514a151f9d395ef5359334ff5267e64f8224919ab9fce698c6940da3fb
