[INFO] cloning repository https://github.com/onContentStop/silver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/onContentStop/silver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FonContentStop%2Fsilver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FonContentStop%2Fsilver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e51c32189839b24c029eb52c87f9b4ed3b0c75a0
[INFO] checking onContentStop/silver against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FonContentStop%2Fsilver" "/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/onContentStop/silver
[INFO] finished tweaking git repo https://github.com/onContentStop/silver
[INFO] tweaked toml for git repo https://github.com/onContentStop/silver written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/onContentStop/silver on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/onContentStop/silver 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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 onContentStop/silver against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FonContentStop%2Fsilver" "/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/onContentStop/silver
[INFO] finished tweaking git repo https://github.com/onContentStop/silver
[INFO] tweaked toml for git repo https://github.com/onContentStop/silver written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/onContentStop/silver on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/onContentStop/silver 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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 anyhow v1.0.35
[INFO] [stderr]   Downloaded ctor v0.1.16
[INFO] [stderr]   Downloaded mio v0.7.6
[INFO] [stderr]   Downloaded crossterm v0.18.2
[INFO] [stderr]   Downloaded proptest v0.10.1
[INFO] [stderr]   Downloaded credibility v0.1.3
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5e3d5990c0dc84a040f27f7fb9bc415ddd4cd1dcf1dbde8bfecf1d7773a1cef
[INFO] running `Command { std: "docker" "start" "-a" "c5e3d5990c0dc84a040f27f7fb9bc415ddd4cd1dcf1dbde8bfecf1d7773a1cef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5e3d5990c0dc84a040f27f7fb9bc415ddd4cd1dcf1dbde8bfecf1d7773a1cef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5e3d5990c0dc84a040f27f7fb9bc415ddd4cd1dcf1dbde8bfecf1d7773a1cef", kill_on_drop: false }`
[INFO] [stdout] c5e3d5990c0dc84a040f27f7fb9bc415ddd4cd1dcf1dbde8bfecf1d7773a1cef
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c54a8ad2c95c7c7f45e8845d17f853b82e9eb4215bd478169a61fcf0d78d1bd1
[INFO] running `Command { std: "docker" "start" "-a" "c54a8ad2c95c7c7f45e8845d17f853b82e9eb4215bd478169a61fcf0d78d1bd1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking smallvec v1.5.1
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling anyhow v1.0.35
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking mio v0.7.6
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking parking_lot_core v0.8.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking crossterm v0.18.2
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]     Checking backtrace v0.3.55
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking credibility v0.1.3
[INFO] [stderr]     Checking silver-language v0.1.0 (/opt/rustwide/workdir/silver-language)
[INFO] [stdout] warning: trait `BoundNode` is never used
[INFO] [stdout]  --> silver-language/src/analysis/binding/bound_node.rs:3:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) trait BoundNode {
[INFO] [stdout]   |                  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BoundNodeKind` is never used
[INFO] [stdout]  --> silver-language/src/analysis/binding/bound_node_kind.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) enum BoundNodeKind {
[INFO] [stdout]   |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SyntaxKindWithText` is never used
[INFO] [stdout]   --> silver-language/src/analysis/syntax/syntax_facts.rs:35:18
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub(crate) trait SyntaxKindWithText {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `text` and `span` are never used
[INFO] [stdout]   --> silver-language/src/analysis/syntax/syntax_node.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait SyntaxNodeExt {
[INFO] [stdout]    |           ------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn text(&self) -> Option<&str>;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 16 |     fn span(&self) -> TextSpan;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking silver v0.1.0 (/opt/rustwide/workdir/silver)
[INFO] [stdout] warning: trait `BoundNode` is never used
[INFO] [stdout]  --> silver-language/src/analysis/binding/bound_node.rs:3:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) trait BoundNode {
[INFO] [stdout]   |                  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BoundNodeKind` is never used
[INFO] [stdout]  --> silver-language/src/analysis/binding/bound_node_kind.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) enum BoundNodeKind {
[INFO] [stdout]   |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `span` is never used
[INFO] [stdout]   --> silver-language/src/analysis/syntax/syntax_node.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait SyntaxNodeExt {
[INFO] [stdout]    |           ------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn span(&self) -> TextSpan;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.32s
[INFO] running `Command { std: "docker" "inspect" "c54a8ad2c95c7c7f45e8845d17f853b82e9eb4215bd478169a61fcf0d78d1bd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c54a8ad2c95c7c7f45e8845d17f853b82e9eb4215bd478169a61fcf0d78d1bd1", kill_on_drop: false }`
[INFO] [stdout] c54a8ad2c95c7c7f45e8845d17f853b82e9eb4215bd478169a61fcf0d78d1bd1