[INFO] cloning repository https://github.com/srj31/rust_exp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/srj31/rust_exp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrj31%2Frust_exp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrj31%2Frust_exp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eca97c0570043fe1c64e9c1fc18f356102a7bdc9
[INFO] testing srj31/rust_exp against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrj31%2Frust_exp" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/srj31/rust_exp
[INFO] finished tweaking git repo https://github.com/srj31/rust_exp
[INFO] tweaked toml for git repo https://github.com/srj31/rust_exp written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/srj31/rust_exp on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/srj31/rust_exp 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing srj31/rust_exp against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsrj31%2Frust_exp" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/srj31/rust_exp
[INFO] finished tweaking git repo https://github.com/srj31/rust_exp
[INFO] tweaked toml for git repo https://github.com/srj31/rust_exp written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/srj31/rust_exp on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/srj31/rust_exp 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ee5317dbd563a823df818079c72c60e9261761eed31b471ae34d2d4c5ff0a2a
[INFO] running `Command { std: "docker" "start" "-a" "3ee5317dbd563a823df818079c72c60e9261761eed31b471ae34d2d4c5ff0a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ee5317dbd563a823df818079c72c60e9261761eed31b471ae34d2d4c5ff0a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ee5317dbd563a823df818079c72c60e9261761eed31b471ae34d2d4c5ff0a2a", kill_on_drop: false }`
[INFO] [stdout] 3ee5317dbd563a823df818079c72c60e9261761eed31b471ae34d2d4c5ff0a2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01b04142afa75eeff2ede7d5e2ef75b8ab75a73563245b191322dca45b8d74d6
[INFO] running `Command { std: "docker" "start" "-a" "01b04142afa75eeff2ede7d5e2ef75b8ab75a73563245b191322dca45b8d74d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_exp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> src/bin/smart_ptrs.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let c = Cell::new(1);
[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: field `value` is never read
[INFO] [stdout]  --> src/bin/interior_mutability/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Cell<T> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 4 |     value: UnsafeCell<T>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set` and `get` are never used
[INFO] [stdout]   --> src/bin/interior_mutability/cell.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | / impl<T> Cell<T>
[INFO] [stdout] 8  | | where
[INFO] [stdout] 9  | |     T: Copy,
[INFO] [stdout]    | |____________- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |       pub fn set(&self, value: T) {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |       pub fn get(&self) -> T {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RefState` is never used
[INFO] [stdout]  --> src/bin/interior_mutability/refcell.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum RefState {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefCell` is never constructed
[INFO] [stdout]   --> src/bin/interior_mutability/refcell.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct RefCell<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `borrow`, and `borrow_mut` are never used
[INFO] [stdout]   --> src/bin/interior_mutability/refcell.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<T> RefCell<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 17 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn borrow(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn borrow_mut(&self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "01b04142afa75eeff2ede7d5e2ef75b8ab75a73563245b191322dca45b8d74d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01b04142afa75eeff2ede7d5e2ef75b8ab75a73563245b191322dca45b8d74d6", kill_on_drop: false }`
[INFO] [stdout] 01b04142afa75eeff2ede7d5e2ef75b8ab75a73563245b191322dca45b8d74d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b98c491e90c61a071d05b3cdbb936e8e71f3a86fedb3f7b92b77f7dc1b78bcb
[INFO] running `Command { std: "docker" "start" "-a" "3b98c491e90c61a071d05b3cdbb936e8e71f3a86fedb3f7b92b77f7dc1b78bcb", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_exp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> src/bin/smart_ptrs.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let c = Cell::new(1);
[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: enum `RefState` is never used
[INFO] [stdout]  --> src/bin/interior_mutability/refcell.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum RefState {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefCell` is never constructed
[INFO] [stdout]   --> src/bin/interior_mutability/refcell.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct RefCell<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `borrow`, and `borrow_mut` are never used
[INFO] [stdout]   --> src/bin/interior_mutability/refcell.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<T> RefCell<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 17 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn borrow(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn borrow_mut(&self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "3b98c491e90c61a071d05b3cdbb936e8e71f3a86fedb3f7b92b77f7dc1b78bcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b98c491e90c61a071d05b3cdbb936e8e71f3a86fedb3f7b92b77f7dc1b78bcb", kill_on_drop: false }`
[INFO] [stdout] 3b98c491e90c61a071d05b3cdbb936e8e71f3a86fedb3f7b92b77f7dc1b78bcb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 59950ad701e9a67dcd78a15f5cdbf231989c219eb696cf94954a71f65bfa39c3
[INFO] running `Command { std: "docker" "start" "-a" "59950ad701e9a67dcd78a15f5cdbf231989c219eb696cf94954a71f65bfa39c3", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]  --> src/bin/smart_ptrs.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let c = Cell::new(1);
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `RefState` is never used
[INFO] [stderr]  --> src/bin/interior_mutability/refcell.rs:5:6
[INFO] [stderr]   |
[INFO] [stderr] 5 | enum RefState {
[INFO] [stderr]   |      ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `RefCell` is never constructed
[INFO] [stderr]   --> src/bin/interior_mutability/refcell.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct RefCell<T> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `borrow`, and `borrow_mut` are never used
[INFO] [stderr]   --> src/bin/interior_mutability/refcell.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl<T> RefCell<T> {
[INFO] [stderr]    | ------------------ associated items in this implementation
[INFO] [stderr] 17 |     pub fn new(value: T) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 |     pub fn borrow(&self) -> Option<&T> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 38 |     pub fn borrow_mut(&self) -> Option<&mut T> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_exp` (bin "smart_ptrs" test) generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/bin/smart_ptrs.rs (/opt/rustwide/target/debug/deps/smart_ptrs-62e4692460e5dabb)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test interior_mutability::tests::name ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "59950ad701e9a67dcd78a15f5cdbf231989c219eb696cf94954a71f65bfa39c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59950ad701e9a67dcd78a15f5cdbf231989c219eb696cf94954a71f65bfa39c3", kill_on_drop: false }`
[INFO] [stdout] 59950ad701e9a67dcd78a15f5cdbf231989c219eb696cf94954a71f65bfa39c3
