[INFO] fetching crate pack-db 0.2.0...
[INFO] testing pack-db-0.2.0 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate pack-db 0.2.0 into /workspace/builds/worker-95/source
[INFO] validating manifest of crates.io crate pack-db 0.2.0 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pack-db 0.2.0
[INFO] finished tweaking crates.io crate pack-db 0.2.0
[INFO] tweaked toml for crates.io crate pack-db 0.2.0 written to /workspace/builds/worker-95/source/Cargo.toml
[INFO] crate crates.io crate pack-db 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rmp-serde v1.0.0-beta.2
[INFO] [stderr]   Downloaded rmp v0.8.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9176b6052affaeff5c324cab0ad6da41ca91915170d3a843c09286a6ce1ed3d7
[INFO] running `Command { std: "docker" "start" "-a" "9176b6052affaeff5c324cab0ad6da41ca91915170d3a843c09286a6ce1ed3d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9176b6052affaeff5c324cab0ad6da41ca91915170d3a843c09286a6ce1ed3d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9176b6052affaeff5c324cab0ad6da41ca91915170d3a843c09286a6ce1ed3d7", kill_on_drop: false }`
[INFO] [stdout] 9176b6052affaeff5c324cab0ad6da41ca91915170d3a843c09286a6ce1ed3d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6b5a5420a7c7f1e7d6b4e908ef8fb3221e5d6d5cd7ae03ed66d8979562a2dfe
[INFO] running `Command { std: "docker" "start" "-a" "c6b5a5420a7c7f1e7d6b4e908ef8fb3221e5d6d5cd7ae03ed66d8979562a2dfe", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling anyhow v1.0.45
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling rmp v0.8.10
[INFO] [stderr]    Compiling rmp-serde v1.0.0-beta.2
[INFO] [stderr]    Compiling pack-db v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.13s
[INFO] running `Command { std: "docker" "inspect" "c6b5a5420a7c7f1e7d6b4e908ef8fb3221e5d6d5cd7ae03ed66d8979562a2dfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6b5a5420a7c7f1e7d6b4e908ef8fb3221e5d6d5cd7ae03ed66d8979562a2dfe", kill_on_drop: false }`
[INFO] [stdout] c6b5a5420a7c7f1e7d6b4e908ef8fb3221e5d6d5cd7ae03ed66d8979562a2dfe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03d1f4c519dc281c41e9e27b858fdaa1bec0ad99deb5b8fbc27af4a33cb2c597
[INFO] running `Command { std: "docker" "start" "-a" "03d1f4c519dc281c41e9e27b858fdaa1bec0ad99deb5b8fbc27af4a33cb2c597", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pack-db v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `serde_json`
[INFO] [stdout]  --> examples/serde_json.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serde_json::{json, Value};
[INFO] [stdout]   |     ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the macro `json`
[INFO] [stdout]  --> examples/serde_json.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |         json!({
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]  --> examples/serde_json.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pack-db` due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "03d1f4c519dc281c41e9e27b858fdaa1bec0ad99deb5b8fbc27af4a33cb2c597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03d1f4c519dc281c41e9e27b858fdaa1bec0ad99deb5b8fbc27af4a33cb2c597", kill_on_drop: false }`
[INFO] [stdout] 03d1f4c519dc281c41e9e27b858fdaa1bec0ad99deb5b8fbc27af4a33cb2c597