[INFO] cloning repository https://github.com/aptend/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aptend/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 04bc68c436826c76a648bacc401fe6e1ece4294c
[INFO] checking aptend/rlox against try#3fada14ee01d755dc8076e611f11bf65b28ffd21 for pr-154971
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faptend%2Frlox" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/aptend/rlox
[INFO] finished tweaking git repo https://github.com/aptend/rlox
[INFO] tweaked toml for git repo https://github.com/aptend/rlox written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/aptend/rlox on toolchain 3fada14ee01d755dc8076e611f11bf65b28ffd21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/aptend/rlox 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" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47b7c660d90df0ef6e6a31c1a462244b538ccf7821529936375f8f1f01c4d53b
[INFO] running `Command { std: "docker" "start" "-a" "47b7c660d90df0ef6e6a31c1a462244b538ccf7821529936375f8f1f01c4d53b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47b7c660d90df0ef6e6a31c1a462244b538ccf7821529936375f8f1f01c4d53b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47b7c660d90df0ef6e6a31c1a462244b538ccf7821529936375f8f1f01c4d53b", kill_on_drop: false }`
[INFO] [stdout] 47b7c660d90df0ef6e6a31c1a462244b538ccf7821529936375f8f1f01c4d53b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 478fe051fc02362c7b2fb1161785c98594157e4a5d0d5f0102b3d95c17d2c202
[INFO] running `Command { std: "docker" "start" "-a" "478fe051fc02362c7b2fb1161785c98594157e4a5d0d5f0102b3d95c17d2c202", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking vm v0.1.0 (/opt/rustwide/workdir/vm)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> vm/src/scanner/scan.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]    |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]    |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/interpreter/value.rs:46:62
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Callable` does not implement `Deref`, so calling `deref` on `&Callable` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 46 -             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout] 46 +             Value::Callable(c) => write!(f, "{:?}", c.deref()),
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Callable`, implement `Clone` for it
[INFO] [stdout]   --> src/interpreter/callable.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 + #[derive(Clone)]
[INFO] [stdout] 25 | pub struct Callable {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&&Callable` instead of dereferencing the inner type
[INFO] [stdout]   --> src/interpreter/value.rs:46:54
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/scanner.rs:183:24
[INFO] [stdout]     |
[INFO] [stdout] 183 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]     |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 183 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/interpreter/value.rs:46:62
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Callable` does not implement `Deref`, so calling `deref` on `&Callable` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 46 -             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout] 46 +             Value::Callable(c) => write!(f, "{:?}", c.deref()),
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Callable`, implement `Clone` for it
[INFO] [stdout]   --> src/interpreter/callable.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 + #[derive(Clone)]
[INFO] [stdout] 25 | pub struct Callable {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&&Callable` instead of dereferencing the inner type
[INFO] [stdout]   --> src/interpreter/value.rs:46:54
[INFO] [stdout]    |
[INFO] [stdout] 46 |             Value::Callable(c) => write!(f, "{:?}", c.deref().deref()),
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/scanner.rs:183:24
[INFO] [stdout]     |
[INFO] [stdout] 183 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]     |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 183 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.41s
[INFO] running `Command { std: "docker" "inspect" "478fe051fc02362c7b2fb1161785c98594157e4a5d0d5f0102b3d95c17d2c202", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "478fe051fc02362c7b2fb1161785c98594157e4a5d0d5f0102b3d95c17d2c202", kill_on_drop: false }`
[INFO] [stdout] 478fe051fc02362c7b2fb1161785c98594157e4a5d0d5f0102b3d95c17d2c202
