[INFO] cloning repository https://github.com/saurabhkaul/dist-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saurabhkaul/dist-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhkaul%2Fdist-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhkaul%2Fdist-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6166c86b44dc3104e49a9b81c82f3b5e29fdea5e
[INFO] checking saurabhkaul/dist-challenge against master#4ecd70ddd1039a3954056c1071e40278048476fa for pr-137633
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhkaul%2Fdist-challenge" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/saurabhkaul/dist-challenge on toolchain 4ecd70ddd1039a3954056c1071e40278048476fa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/saurabhkaul/dist-challenge
[INFO] finished tweaking git repo https://github.com/saurabhkaul/dist-challenge
[INFO] tweaked toml for git repo https://github.com/saurabhkaul/dist-challenge written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/saurabhkaul/dist-challenge 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" "+4ecd70ddd1039a3954056c1071e40278048476fa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple-error v0.3.0
[INFO] [stderr]   Downloaded rustix v0.38.22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45c43f18f20649af77e044014f3c96b7887b582b350f5b59746852bf7a623e70
[INFO] running `Command { std: "docker" "start" "-a" "45c43f18f20649af77e044014f3c96b7887b582b350f5b59746852bf7a623e70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45c43f18f20649af77e044014f3c96b7887b582b350f5b59746852bf7a623e70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45c43f18f20649af77e044014f3c96b7887b582b350f5b59746852bf7a623e70", kill_on_drop: false }`
[INFO] [stdout] 45c43f18f20649af77e044014f3c96b7887b582b350f5b59746852bf7a623e70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 904f5c785247ce1d4c6171f4d04a78e2e18c856f5343448a3e51f727695e391e
[INFO] running `Command { std: "docker" "start" "-a" "904f5c785247ce1d4c6171f4d04a78e2e18c856f5343448a3e51f727695e391e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]     Checking futures-sink v0.3.29
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking smallvec v1.11.2
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]    Compiling rustix v0.38.22
[INFO] [stderr]    Compiling serde v1.0.205
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]     Checking linux-raw-sys v0.4.11
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]     Checking mio v0.8.9
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling async-trait v0.1.74
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking termcolor v1.4.0
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking simple-error v0.3.0
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking env_logger v0.10.1
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling serde_derive v1.0.205
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.34.0
[INFO] [stderr]     Checking futures-executor v0.3.29
[INFO] [stderr]     Checking futures v0.3.29
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking tokio-context v0.1.3
[INFO] [stderr]     Checking serde_path_to_error v0.1.16
[INFO] [stderr]     Checking echo v0.1.0 (/opt/rustwide/workdir/src/echo)
[INFO] [stdout] warning: variant `echo` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     echo { msg_id: Option<usize>, echo: String },
[INFO] [stdout]    |     ^^^^ help: convert the identifier to upper camel case: `Echo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `echo_ok` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     echo_ok {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to upper camel case: `EchoOk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `init` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     init {
[INFO] [stdout]    |     ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `init_ok` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     init_ok {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to upper camel case: `InitOk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `echo` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     echo { msg_id: Option<usize>, echo: String },
[INFO] [stdout]    |     ^^^^ help: convert the identifier to upper camel case: `Echo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `echo_ok` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     echo_ok {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to upper camel case: `EchoOk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `init` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     init {
[INFO] [stdout]    |     ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `init_ok` should have an upper camel case name
[INFO] [stdout]   --> src/echo/src/lib.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     init_ok {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to upper camel case: `InitOk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_ids`
[INFO] [stdout]    --> src/echo/src/lib.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 node_ids,
[INFO] [stdout]     |                 ^^^^^^^^ help: try ignoring the field: `node_ids: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_ids`
[INFO] [stdout]    --> src/echo/src/lib.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 node_ids,
[INFO] [stdout]     |                 ^^^^^^^^ help: try ignoring the field: `node_ids: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking dist-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Message`
[INFO] [stdout]  --> src/main.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use echo::{EchoNode, Message, Node};
[INFO] [stdout]   |                      ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]  --> src/main.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{stdin, Read, Write};
[INFO] [stdout]   |                      ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Message`
[INFO] [stdout]  --> src/main.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use echo::{EchoNode, Message, Node};
[INFO] [stdout]   |                      ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]  --> src/main.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{stdin, Read, Write};
[INFO] [stdout]   |                      ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.56s
[INFO] running `Command { std: "docker" "inspect" "904f5c785247ce1d4c6171f4d04a78e2e18c856f5343448a3e51f727695e391e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "904f5c785247ce1d4c6171f4d04a78e2e18c856f5343448a3e51f727695e391e", kill_on_drop: false }`
[INFO] [stdout] 904f5c785247ce1d4c6171f4d04a78e2e18c856f5343448a3e51f727695e391e