[INFO] cloning repository https://github.com/ElPicador/rust_db
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ElPicador/rust_db" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElPicador%2Frust_db", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElPicador%2Frust_db'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7841d44fdd358d344d2bc69055860328fb65f064
[INFO] testing ElPicador/rust_db against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElPicador%2Frust_db" "/workspace/builds/worker-110/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-110/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ElPicador/rust_db on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ElPicador/rust_db
[INFO] finished tweaking git repo https://github.com/ElPicador/rust_db
[INFO] tweaked toml for git repo https://github.com/ElPicador/rust_db written to /workspace/builds/worker-110/source/Cargo.toml
[INFO] crate git repo https://github.com/ElPicador/rust_db already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 195d50878a1e482c661e922fcedb96f238ae92e620f0fbf2138a7428bb8cb585
[INFO] running `Command { std: "docker" "start" "-a" "195d50878a1e482c661e922fcedb96f238ae92e620f0fbf2138a7428bb8cb585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "195d50878a1e482c661e922fcedb96f238ae92e620f0fbf2138a7428bb8cb585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "195d50878a1e482c661e922fcedb96f238ae92e620f0fbf2138a7428bb8cb585", kill_on_drop: false }`
[INFO] [stdout] 195d50878a1e482c661e922fcedb96f238ae92e620f0fbf2138a7428bb8cb585
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e43104be6219eaa98c407608afbee98478c79a99c5a5672d3d19d77e970c993
[INFO] running `Command { std: "docker" "start" "-a" "4e43104be6219eaa98c407608afbee98478c79a99c5a5672d3d19d77e970c993", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: the method `read` exists for struct `BufReader<u8>`, but its trait bounds were not satisfied
[INFO] [stdout]   --> src/row.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 |           input.read(&id_buffer);
[INFO] [stdout]    |                 ^^^^ method cannot be called on `BufReader<u8>` due to unsatisfied trait bounds
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `u8: std::io::Read`
[INFO] [stdout]            which is required by `BufReader<u8>: std::io::Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `read` exists for struct `BufReader<u8>`, but its trait bounds were not satisfied
[INFO] [stdout]   --> src/row.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |           input.read(&username_len);
[INFO] [stdout]    |                 ^^^^ method cannot be called on `BufReader<u8>` due to unsatisfied trait bounds
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `u8: std::io::Read`
[INFO] [stdout]            which is required by `BufReader<u8>: std::io::Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/row.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::Read;
[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 E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_db` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "4e43104be6219eaa98c407608afbee98478c79a99c5a5672d3d19d77e970c993", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e43104be6219eaa98c407608afbee98478c79a99c5a5672d3d19d77e970c993", kill_on_drop: false }`
[INFO] [stdout] 4e43104be6219eaa98c407608afbee98478c79a99c5a5672d3d19d77e970c993