[INFO] cloning repository https://github.com/hh1718/rust_mysql_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hh1718/rust_mysql_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhh1718%2Frust_mysql_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhh1718%2Frust_mysql_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a043bd288d591e3d81fdf56e7a5f24b17f108cd1
[INFO] testing hh1718/rust_mysql_example against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhh1718%2Frust_mysql_example" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hh1718/rust_mysql_example on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hh1718/rust_mysql_example
[INFO] finished tweaking git repo https://github.com/hh1718/rust_mysql_example
[INFO] tweaked toml for git repo https://github.com/hh1718/rust_mysql_example written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/hh1718/rust_mysql_example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lexical v5.2.0
[INFO] [stderr]   Downloaded io-enum v0.2.4
[INFO] [stderr]   Downloaded mysql_common v0.24.1
[INFO] [stderr]   Downloaded lru v0.6.1
[INFO] [stderr]   Downloaded mysql v20.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f48cdf73b00ad5f59778d659acb15cf393b6dff31febbfc4604d51f6914d65ab
[INFO] running `Command { std: "docker" "start" "-a" "f48cdf73b00ad5f59778d659acb15cf393b6dff31febbfc4604d51f6914d65ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f48cdf73b00ad5f59778d659acb15cf393b6dff31febbfc4604d51f6914d65ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f48cdf73b00ad5f59778d659acb15cf393b6dff31febbfc4604d51f6914d65ab", kill_on_drop: false }`
[INFO] [stdout] f48cdf73b00ad5f59778d659acb15cf393b6dff31febbfc4604d51f6914d65ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7386243a5f9cb0ea49084d1f7ffb70bacbf6191fee8989fc6b380bb3556a48a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d7386243a5f9cb0ea49084d1f7ffb70bacbf6191fee8989fc6b380bb3556a48a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling cc v1.0.65
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling lexical-core v0.7.4
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling ahash v0.4.6
[INFO] [stderr]    Compiling native-tls v0.2.6
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling mysql v20.1.0
[INFO] [stderr]    Compiling bufstream v0.1.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling io-enum v0.2.4
[INFO] [stderr]    Compiling standback v0.2.13
[INFO] [stderr]    Compiling time v0.2.23
[INFO] [stderr]    Compiling form_urlencoded v1.0.0
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling lru v0.6.1
[INFO] [stderr]    Compiling url v2.2.0
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling pem v0.8.2
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling socket2 v0.3.17
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling lexical v5.2.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling derive_utils v0.11.0
[INFO] [stderr]    Compiling twox-hash v1.6.0
[INFO] [stderr]    Compiling rust_decimal v1.8.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling bigdecimal v0.1.2
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling time-macros v0.1.1
[INFO] [stderr]    Compiling mysql_common v0.24.1
[INFO] [stderr]    Compiling rust_mysql_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `prep_exec` found for struct `Pool` in the current scope
[INFO] [stdout]   --> src/dao/db.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |   pool.prep_exec(query, ())
[INFO] [stdout]    |        ^^^^^^^^^ method not found in `Pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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_mysql_example`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d7386243a5f9cb0ea49084d1f7ffb70bacbf6191fee8989fc6b380bb3556a48a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7386243a5f9cb0ea49084d1f7ffb70bacbf6191fee8989fc6b380bb3556a48a", kill_on_drop: false }`
[INFO] [stdout] d7386243a5f9cb0ea49084d1f7ffb70bacbf6191fee8989fc6b380bb3556a48a