[INFO] fetching crate serde-loader 0.2.0...
[INFO] building serde-loader-0.2.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate serde-loader 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate serde-loader 0.2.0
[INFO] finished tweaking crates.io crate serde-loader 0.2.0
[INFO] tweaked toml for crates.io crate serde-loader 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde-loader 0.2.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 42 packages to latest compatible versions
[INFO] [stderr]       Adding prost v0.11.9 (available: v0.14.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1384983f828b2c2bedea09afcc9e6d804c489f5eaf60e889143118a43d6fb39
[INFO] running `Command { std: "docker" "start" "-a" "a1384983f828b2c2bedea09afcc9e6d804c489f5eaf60e889143118a43d6fb39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1384983f828b2c2bedea09afcc9e6d804c489f5eaf60e889143118a43d6fb39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1384983f828b2c2bedea09afcc9e6d804c489f5eaf60e889143118a43d6fb39", kill_on_drop: false }`
[INFO] [stdout] a1384983f828b2c2bedea09afcc9e6d804c489f5eaf60e889143118a43d6fb39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06344c425e21be93bed4ad9c00c928d4592f05e2c916fa5c38dcaaa1a4c914f5
[INFO] running `Command { std: "docker" "start" "-a" "06344c425e21be93bed4ad9c00c928d4592f05e2c916fa5c38dcaaa1a4c914f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde-loader v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Context as _`
[INFO] [stdout]  --> src/common.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use anyhow::{format_err, Context as _, Result};
[INFO] [stdout]   |                              ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs`, `mem::ManuallyDrop`, `ptr::NonNull`, and `ptr`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fmt, fs, io,
[INFO] [stdout]    |          ^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     mem::ManuallyDrop,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     ptr,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 21 |     ptr::NonNull,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.70s
[INFO] running `Command { std: "docker" "inspect" "06344c425e21be93bed4ad9c00c928d4592f05e2c916fa5c38dcaaa1a4c914f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06344c425e21be93bed4ad9c00c928d4592f05e2c916fa5c38dcaaa1a4c914f5", kill_on_drop: false }`
[INFO] [stdout] 06344c425e21be93bed4ad9c00c928d4592f05e2c916fa5c38dcaaa1a4c914f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6da4b2bc1fdc7c098a321ed63f72326e6d49a8e347a0787bd17e44e300361ff1
[INFO] running `Command { std: "docker" "start" "-a" "6da4b2bc1fdc7c098a321ed63f72326e6d49a8e347a0787bd17e44e300361ff1", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `Context as _`
[INFO] [stdout]  --> src/common.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use anyhow::{format_err, Context as _, Result};
[INFO] [stdout]   |                              ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs`, `mem::ManuallyDrop`, `ptr::NonNull`, and `ptr`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fmt, fs, io,
[INFO] [stdout]    |          ^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     mem::ManuallyDrop,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     ptr,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 21 |     ptr::NonNull,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde-loader v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Context as _`
[INFO] [stdout]  --> src/common.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use anyhow::{format_err, Context as _, Result};
[INFO] [stdout]   |                              ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs`, `mem::ManuallyDrop`, `ptr::NonNull`, and `ptr`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fmt, fs, io,
[INFO] [stdout]    |          ^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     mem::ManuallyDrop,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     ptr,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 21 |     ptr::NonNull,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "6da4b2bc1fdc7c098a321ed63f72326e6d49a8e347a0787bd17e44e300361ff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6da4b2bc1fdc7c098a321ed63f72326e6d49a8e347a0787bd17e44e300361ff1", kill_on_drop: false }`
[INFO] [stdout] 6da4b2bc1fdc7c098a321ed63f72326e6d49a8e347a0787bd17e44e300361ff1