[INFO] fetching crate supervisor-rs 0.7.1...
[INFO] checking supervisor-rs-0.7.1 against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] extracting crate supervisor-rs 0.7.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate supervisor-rs 0.7.1 on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate supervisor-rs 0.7.1
[INFO] finished tweaking crates.io crate supervisor-rs 0.7.1
[INFO] tweaked toml for crates.io crate supervisor-rs 0.7.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate supervisor-rs 0.7.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linked-hash-map v0.5.3
[INFO] [stderr]   Downloaded num-integer v0.1.43
[INFO] [stderr]   Downloaded libc v0.2.78
[INFO] [stderr]   Downloaded yaml-rust v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2fd4a1ef058d286276dd93c6f6cc32f652468a228cce81d34abe01d8ccbb88e1
[INFO] running `Command { std: "docker" "start" "-a" "2fd4a1ef058d286276dd93c6f6cc32f652468a228cce81d34abe01d8ccbb88e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fd4a1ef058d286276dd93c6f6cc32f652468a228cce81d34abe01d8ccbb88e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fd4a1ef058d286276dd93c6f6cc32f652468a228cce81d34abe01d8ccbb88e1", kill_on_drop: false }`
[INFO] [stdout] 2fd4a1ef058d286276dd93c6f6cc32f652468a228cce81d34abe01d8ccbb88e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a3edc3a8f3afabea40a24b2c0f7aa033a017a5796dc21bd037e3b0754c55f6f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4a3edc3a8f3afabea40a24b2c0f7aa033a017a5796dc21bd037e3b0754c55f6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking supervisor-rs v0.7.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `command_argvs`
[INFO] [stdout]    --> src/child.rs:246:8
[INFO] [stdout]     |
[INFO] [stdout] 246 |     fn command_argvs() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_ls`
[INFO] [stdout]    --> src/child.rs:257:8
[INFO] [stdout]     |
[INFO] [stdout] 257 |     fn run_ls() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.71s
[INFO] running `Command { std: "docker" "inspect" "4a3edc3a8f3afabea40a24b2c0f7aa033a017a5796dc21bd037e3b0754c55f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a3edc3a8f3afabea40a24b2c0f7aa033a017a5796dc21bd037e3b0754c55f6f", kill_on_drop: false }`
[INFO] [stdout] 4a3edc3a8f3afabea40a24b2c0f7aa033a017a5796dc21bd037e3b0754c55f6f