[INFO] cloning repository https://github.com/super-phreak/serde-fans1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/super-phreak/serde-fans1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuper-phreak%2Fserde-fans1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuper-phreak%2Fserde-fans1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b9b56c785f5df2802abaaa91c305d33caadc61f
[INFO] checking super-phreak/serde-fans1 against try#804fff1ae95da9d03bd44eee27f258020a575dab for pr-146013
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuper-phreak%2Fserde-fans1" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/super-phreak/serde-fans1
[INFO] finished tweaking git repo https://github.com/super-phreak/serde-fans1
[INFO] tweaked toml for git repo https://github.com/super-phreak/serde-fans1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/super-phreak/serde-fans1 on toolchain 804fff1ae95da9d03bd44eee27f258020a575dab
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+804fff1ae95da9d03bd44eee27f258020a575dab" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/super-phreak/serde-fans1 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" "+804fff1ae95da9d03bd44eee27f258020a575dab" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+804fff1ae95da9d03bd44eee27f258020a575dab" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 874fb935cfa79531e887d522d73d4f51f7204519c6373d0a2e44ade56db2d96f
[INFO] running `Command { std: "docker" "start" "-a" "874fb935cfa79531e887d522d73d4f51f7204519c6373d0a2e44ade56db2d96f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "874fb935cfa79531e887d522d73d4f51f7204519c6373d0a2e44ade56db2d96f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "874fb935cfa79531e887d522d73d4f51f7204519c6373d0a2e44ade56db2d96f", kill_on_drop: false }`
[INFO] [stdout] 874fb935cfa79531e887d522d73d4f51f7204519c6373d0a2e44ade56db2d96f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+804fff1ae95da9d03bd44eee27f258020a575dab" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 658d3f337d66c76b98a679bd1601a04751bfdaafebd872fb1517b6fcc74bcbff
[INFO] running `Command { std: "docker" "start" "-a" "658d3f337d66c76b98a679bd1601a04751bfdaafebd872fb1517b6fcc74bcbff", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]     Checking serde-fans1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `code` is never read
[INFO] [stdout]   --> src/error.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct ErrorImpl {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 12 |     code: ErrorCode,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Message`, `Io`, `EofWhileParsingValue`, `InvalidTag`, and `InvalidLength` are never constructed
[INFO] [stdout]   --> src/error.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub(crate) enum ErrorCode {
[INFO] [stdout]    |                 --------- variants in this enum
[INFO] [stdout] 27 |     Message(Box<str>),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 28 |     Io(Box<io::Error>),
[INFO] [stdout]    |     ^^
[INFO] [stdout] 29 |     EofWhileParsingValue,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     InvalidTag,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 31 |     InvalidLength, 
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `code` is never read
[INFO] [stdout]   --> src/error.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct ErrorImpl {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 12 |     code: ErrorCode,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Message`, `Io`, `EofWhileParsingValue`, `InvalidTag`, and `InvalidLength` are never constructed
[INFO] [stdout]   --> src/error.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub(crate) enum ErrorCode {
[INFO] [stdout]    |                 --------- variants in this enum
[INFO] [stdout] 27 |     Message(Box<str>),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 28 |     Io(Box<io::Error>),
[INFO] [stdout]    |     ^^
[INFO] [stdout] 29 |     EofWhileParsingValue,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     InvalidTag,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 31 |     InvalidLength, 
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "658d3f337d66c76b98a679bd1601a04751bfdaafebd872fb1517b6fcc74bcbff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "658d3f337d66c76b98a679bd1601a04751bfdaafebd872fb1517b6fcc74bcbff", kill_on_drop: false }`
[INFO] [stdout] 658d3f337d66c76b98a679bd1601a04751bfdaafebd872fb1517b6fcc74bcbff