[INFO] fetching crate ron 0.6.5...
[INFO] checking ron-0.6.5 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate ron 0.6.5 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate ron 0.6.5 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ron 0.6.5
[INFO] finished tweaking crates.io crate ron 0.6.5
[INFO] tweaked toml for crates.io crate ron 0.6.5 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate crates.io crate ron 0.6.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5d62301f290431fefe9d93b0944a0acb37c8677a9f093095f9084abdaa23d6d
[INFO] running `Command { std: "docker" "start" "-a" "f5d62301f290431fefe9d93b0944a0acb37c8677a9f093095f9084abdaa23d6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5d62301f290431fefe9d93b0944a0acb37c8677a9f093095f9084abdaa23d6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5d62301f290431fefe9d93b0944a0acb37c8677a9f093095f9084abdaa23d6d", kill_on_drop: false }`
[INFO] [stdout] f5d62301f290431fefe9d93b0944a0acb37c8677a9f093095f9084abdaa23d6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1f1dea45a6cd59356ebdc029e247492daa6fd060c007c395d6f8b6ed2da56bd
[INFO] running `Command { std: "docker" "start" "-a" "e1f1dea45a6cd59356ebdc029e247492daa6fd060c007c395d6f8b6ed2da56bd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Checking ron v0.6.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `boolean`
[INFO] [stdout]  --> examples/decode.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     boolean: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `float`
[INFO] [stdout]  --> examples/decode.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     float: f32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `map`
[INFO] [stdout]  --> examples/decode.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     map: HashMap<u8, char>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `nested`
[INFO] [stdout]   --> examples/decode.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     nested: Nested,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `option`
[INFO] [stdout]   --> examples/decode.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     option: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tuple`
[INFO] [stdout]   --> examples/decode.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     tuple: (u32, u32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]   --> examples/decode.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     a: String,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `b`
[INFO] [stdout]   --> examples/decode.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     b: char,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `boolean`
[INFO] [stdout]  --> examples/decode_file.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     boolean: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `float`
[INFO] [stdout]  --> examples/decode_file.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     float: f32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `map`
[INFO] [stdout]  --> examples/decode_file.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     map: HashMap<u8, char>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `nested`
[INFO] [stdout]   --> examples/decode_file.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     nested: Nested,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tuple`
[INFO] [stdout]   --> examples/decode_file.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     tuple: (u32, u32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]   --> examples/decode_file.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     a: String,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `b`
[INFO] [stdout]   --> examples/decode_file.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     b: char,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.28s
[INFO] running `Command { std: "docker" "inspect" "e1f1dea45a6cd59356ebdc029e247492daa6fd060c007c395d6f8b6ed2da56bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1f1dea45a6cd59356ebdc029e247492daa6fd060c007c395d6f8b6ed2da56bd", kill_on_drop: false }`
[INFO] [stdout] e1f1dea45a6cd59356ebdc029e247492daa6fd060c007c395d6f8b6ed2da56bd