[INFO] cloning repository https://github.com/justiceb/TOML2JSON_DLL
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/justiceb/TOML2JSON_DLL" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjusticeb%2FTOML2JSON_DLL", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjusticeb%2FTOML2JSON_DLL'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e44f3263d42eda239d78bb1314a04e724036b415
[INFO] checking justiceb/TOML2JSON_DLL against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjusticeb%2FTOML2JSON_DLL" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/justiceb/TOML2JSON_DLL on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/justiceb/TOML2JSON_DLL
[INFO] finished tweaking git repo https://github.com/justiceb/TOML2JSON_DLL
[INFO] tweaked toml for git repo https://github.com/justiceb/TOML2JSON_DLL written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/justiceb/TOML2JSON_DLL 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking justiceb/TOML2JSON_DLL against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjusticeb%2FTOML2JSON_DLL" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/justiceb/TOML2JSON_DLL on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/justiceb/TOML2JSON_DLL
[INFO] finished tweaking git repo https://github.com/justiceb/TOML2JSON_DLL
[INFO] tweaked toml for git repo https://github.com/justiceb/TOML2JSON_DLL written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/justiceb/TOML2JSON_DLL 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 118ebf9c10ee820dfeb40ce4d944de19d71a78412bd75e52f8d6221730f75ed2
[INFO] running `Command { std: "docker" "start" "-a" "118ebf9c10ee820dfeb40ce4d944de19d71a78412bd75e52f8d6221730f75ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "118ebf9c10ee820dfeb40ce4d944de19d71a78412bd75e52f8d6221730f75ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "118ebf9c10ee820dfeb40ce4d944de19d71a78412bd75e52f8d6221730f75ed2", kill_on_drop: false }`
[INFO] [stdout] 118ebf9c10ee820dfeb40ce4d944de19d71a78412bd75e52f8d6221730f75ed2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dtail_expr_drop_order" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d291cc0c6115fd5d419781ba1b9914cd8f09e28ea1338fd3cd2c68f28753976b
[INFO] running `Command { std: "docker" "start" "-a" "d291cc0c6115fd5d419781ba1b9914cd8f09e28ea1338fd3cd2c68f28753976b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]     Checking winnow v0.5.19
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]     Checking serde_spanned v0.6.4
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking toml_edit v0.21.0
[INFO] [stderr]     Checking toml v0.8.8
[INFO] [stderr]     Checking TOML2JSON_dll v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `json_string` is never read
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut json_string = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `json_string` is never read
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut json_string = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `TOML2JSON` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `toml2_json`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.98s
[INFO] running `Command { std: "docker" "inspect" "d291cc0c6115fd5d419781ba1b9914cd8f09e28ea1338fd3cd2c68f28753976b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d291cc0c6115fd5d419781ba1b9914cd8f09e28ea1338fd3cd2c68f28753976b", kill_on_drop: false }`
[INFO] [stdout] d291cc0c6115fd5d419781ba1b9914cd8f09e28ea1338fd3cd2c68f28753976b