[INFO] cloning repository https://github.com/yelcat/iot_hub
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yelcat/iot_hub" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyelcat%2Fiot_hub", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyelcat%2Fiot_hub'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d289d83665018ae062190551425188eb09c76b46
[INFO] checking yelcat/iot_hub against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyelcat%2Fiot_hub" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yelcat/iot_hub on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yelcat/iot_hub
[INFO] finished tweaking git repo https://github.com/yelcat/iot_hub
[INFO] tweaked toml for git repo https://github.com/yelcat/iot_hub written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/yelcat/iot_hub already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded net2 v0.2.31
[INFO] [stderr]   Downloaded fuchsia-zircon v0.2.1
[INFO] [stderr]   Downloaded serde v1.0.23
[INFO] [stderr]   Downloaded serde_derive_internals v0.17.0
[INFO] [stderr]   Downloaded serde_derive v1.0.23
[INFO] [stderr]   Downloaded thread_local v0.3.4
[INFO] [stderr]   Downloaded bytes v0.4.5
[INFO] [stderr]   Downloaded tokio-io v0.1.4
[INFO] [stderr]   Downloaded lazycell v0.5.1
[INFO] [stderr]   Downloaded mio v0.6.11
[INFO] [stderr]   Downloaded regex v0.2.3
[INFO] [stderr]   Downloaded fuchsia-zircon-sys v0.2.0
[INFO] [stderr]   Downloaded libc v0.2.34
[INFO] [stderr]   Downloaded tokio-core v0.1.11
[INFO] [stderr]   Downloaded slab v0.4.0
[INFO] [stderr]   Downloaded scoped-tls v0.1.0
[INFO] [stderr]   Downloaded serde_json v1.0.6
[INFO] [stderr]   Downloaded iovec v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 932dd370d49477839c671849639c9c1691f9f1c58d4285390a127e2ca0a95d61
[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" "932dd370d49477839c671849639c9c1691f9f1c58d4285390a127e2ca0a95d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "932dd370d49477839c671849639c9c1691f9f1c58d4285390a127e2ca0a95d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "932dd370d49477839c671849639c9c1691f9f1c58d4285390a127e2ca0a95d61", kill_on_drop: false }`
[INFO] [stdout] 932dd370d49477839c671849639c9c1691f9f1c58d4285390a127e2ca0a95d61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37aa96143038b45f38d14f22937bfd09bd164045b8746a3b10c43e7f162fcb0b
[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" "37aa96143038b45f38d14f22937bfd09bd164045b8746a3b10c43e7f162fcb0b", 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]     Checking libc v0.2.34
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking lazycell v0.5.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking futures v0.1.17
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking serde v1.0.23
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]    Compiling serde_derive_internals v0.17.0
[INFO] [stderr]     Checking iovec v0.1.1
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking bytes v0.4.5
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking mio v0.6.11
[INFO] [stderr]    Compiling serde_derive v1.0.23
[INFO] [stderr]     Checking regex v0.2.3
[INFO] [stderr]     Checking tokio-io v0.1.4
[INFO] [stderr]     Checking tokio-core v0.1.11
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking serde_json v1.0.6
[INFO] [stderr]     Checking iot_hub v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/proto.rs:39:25
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => panic!(format!("Invalid message type {}", buf[0])),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => panic!("Invalid message type {}", buf[0]),
[INFO] [stdout]    |                        --                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/proto.rs:39:25
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => panic!(format!("Invalid message type {}", buf[0])),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => panic!("Invalid message type {}", buf[0]),
[INFO] [stdout]    |                        --                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.66s
[INFO] running `Command { std: "docker" "inspect" "37aa96143038b45f38d14f22937bfd09bd164045b8746a3b10c43e7f162fcb0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37aa96143038b45f38d14f22937bfd09bd164045b8746a3b10c43e7f162fcb0b", kill_on_drop: false }`
[INFO] [stdout] 37aa96143038b45f38d14f22937bfd09bd164045b8746a3b10c43e7f162fcb0b