[INFO] updating cached repository ElPicador/rust_db
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ElPicador/rust_db
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ElPicador/rust_db" "work/ex/beta-1.38-1/sources/1.37.0/gh/ElPicador/rust_db"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ElPicador/rust_db'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ElPicador/rust_db" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ElPicador/rust_db"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ElPicador/rust_db'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7841d44fdd358d344d2bc69055860328fb65f064
[INFO] sha for GitHub repo ElPicador/rust_db: 7841d44fdd358d344d2bc69055860328fb65f064
[INFO] validating manifest of ElPicador/rust_db on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ElPicador/rust_db on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ElPicador/rust_db
[INFO] finished frobbing ElPicador/rust_db
[INFO] frobbed toml for ElPicador/rust_db written to work/ex/beta-1.38-1/sources/1.37.0/gh/ElPicador/rust_db/Cargo.toml
[INFO] started frobbing ElPicador/rust_db
[INFO] finished frobbing ElPicador/rust_db
[INFO] frobbed toml for ElPicador/rust_db written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ElPicador/rust_db/Cargo.toml
[INFO] crate ElPicador/rust_db already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ElPicador/rust_db against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ElPicador/rust_db:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 3e2911628486883044979d8443c801f16b4e578fa7744bfad9a0466c13fdefa9
[INFO] running `"docker" "start" "-a" "3e2911628486883044979d8443c801f16b4e578fa7744bfad9a0466c13fdefa9"`
[INFO] [stderr]    Compiling rust_db v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0599]: no method named `read` found for type `std::io::BufReader<u8>` in the current scope
[INFO] [stderr]   --> src/row.rs:20:15
[INFO] [stderr]    |
[INFO] [stderr] 20 |         input.read(&id_buffer);
[INFO] [stderr]    |               ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `read` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `std::io::BufReader<u8> : std::io::Read`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `read` found for type `std::io::BufReader<u8>` in the current scope
[INFO] [stderr]   --> src/row.rs:22:15
[INFO] [stderr]    |
[INFO] [stderr] 22 |         input.read(&username_len);
[INFO] [stderr]    |               ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `read` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `std::io::BufReader<u8> : std::io::Read`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]  --> src/row.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::io::Read;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `rust_db`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3e2911628486883044979d8443c801f16b4e578fa7744bfad9a0466c13fdefa9"`
[INFO] running `"docker" "rm" "-f" "3e2911628486883044979d8443c801f16b4e578fa7744bfad9a0466c13fdefa9"`
[INFO] [stdout] 3e2911628486883044979d8443c801f16b4e578fa7744bfad9a0466c13fdefa9