[INFO] updating cached repository https://github.com/dinowernli/marvin
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 23542259fb7998ddf26a6c45d7c05debb18f204b
[INFO] checking dinowernli/marvin against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinowernli%2Fmarvin" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dinowernli/marvin on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/dinowernli/marvin
[INFO] finished tweaking git repo https://github.com/dinowernli/marvin
[INFO] tweaked toml for git repo https://github.com/dinowernli/marvin written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/dinowernli/marvin already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-13/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[INFO] the lockfile is outdated, regenerating it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 `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c78bc8d2e3f019f55545638385ad686ee151285be1ca056cdeba1817cc5e452
[INFO] running `"docker" "start" "-a" "7c78bc8d2e3f019f55545638385ad686ee151285be1ca056cdeba1817cc5e452"`
[INFO] [stderr]     Checking ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved imports `log::LogLevel`, `log::LogMetadata`, `log::LogRecord`
[INFO] [stderr]   --> src/logger.rs:28:11
[INFO] [stderr]    |
[INFO] [stderr] 28 | use log::{LogLevel, LogMetadata, LogRecord};
[INFO] [stderr]    |           ^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^ no `LogRecord` in the root
[INFO] [stderr]    |           |         |
[INFO] [stderr]    |           |         no `LogMetadata` in the root
[INFO] [stderr]    |           no `LogLevel` in the root
[INFO] [stderr]    |
[INFO] [stderr] help: a similar name exists in the module
[INFO] [stderr]    |
[INFO] [stderr] 28 | use log::{LogLevel, Metadata, LogRecord};
[INFO] [stderr]    |                     ^^^^^^^^
[INFO] [stderr] help: a similar name exists in the module
[INFO] [stderr]    |
[INFO] [stderr] 28 | use log::{LogLevel, LogMetadata, Record};
[INFO] [stderr]    |                                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | #[macro_use] extern crate log;
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:36:18
[INFO] [stderr]    |
[INFO] [stderr] 36 |   predictor: Box<Predictor>,
[INFO] [stderr]    |                  ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:40:25
[INFO] [stderr]    |
[INFO] [stderr] 40 |   explorer_factory: Box<ExplorerFactory>,
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ExplorerFactory`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:56:22
[INFO] [stderr]    |
[INFO] [stderr] 56 |       predictor: Box<Predictor>,
[INFO] [stderr]    |                      ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:57:29
[INFO] [stderr]    |
[INFO] [stderr] 57 |       explorer_factory: Box<ExplorerFactory>) -> Self {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ExplorerFactory`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/environment/environment.rs:43:19
[INFO] [stderr]    |
[INFO] [stderr] 43 |   random: &'a mut Random,
[INFO] [stderr]    |                   ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/environment/environment.rs:54:30
[INFO] [stderr]    |
[INFO] [stderr] 54 |   pub fn new(random: &'a mut Random) -> CoinFlip<'a> {
[INFO] [stderr]    |                              ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:32:33
[INFO] [stderr]    |
[INFO] [stderr] 32 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a>;
[INFO] [stderr]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:32:51
[INFO] [stderr]    |
[INFO] [stderr] 32 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a>;
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^ help: use `dyn`: `dyn Explorer + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:34:21
[INFO] [stderr]    |
[INFO] [stderr] 34 |       &self) -> Box<Explorer>;
[INFO] [stderr]    |                     ^^^^^^^^ help: use `dyn`: `dyn Explorer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:45:33
[INFO] [stderr]    |
[INFO] [stderr] 45 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a> {
[INFO] [stderr]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:45:51
[INFO] [stderr]    |
[INFO] [stderr] 45 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a> {
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^ help: use `dyn`: `dyn Explorer + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:49:43
[INFO] [stderr]    |
[INFO] [stderr] 49 |   fn create_random_explorer(&self) -> Box<Explorer> {
[INFO] [stderr]    |                                           ^^^^^^^^ help: use `dyn`: `dyn Explorer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/monte_carlo_explorer.rs:28:22
[INFO] [stderr]    |
[INFO] [stderr] 28 |   predictor: &'a mut Predictor,
[INFO] [stderr]    |                      ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/monte_carlo_explorer.rs:32:30
[INFO] [stderr]    |
[INFO] [stderr] 32 |   pub fn new(predictor: &mut Predictor) -> MonteCarloExplorer {
[INFO] [stderr]    |                              ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/random_explorer.rs:28:15
[INFO] [stderr]    |
[INFO] [stderr] 28 |   random: Box<Random>
[INFO] [stderr]    |               ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/random_explorer.rs:32:26
[INFO] [stderr]    |
[INFO] [stderr] 32 |   pub fn new(random: Box<Random>) -> RandomExplorer {
[INFO] [stderr]    |                          ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] error[E0046]: not all trait items implemented, missing: `flush`
[INFO] [stderr]   --> src/logger.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl log::Log for StdoutLogger {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `flush` in implementation
[INFO] [stderr]    |
[INFO] [stderr]    = help: implement the missing item: `fn flush(&self) { todo!() }`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `log::LogLevel`, `log::LogMetadata`, `log::LogRecord`
[INFO] [stderr]   --> src/logger.rs:28:11
[INFO] [stderr]    |
[INFO] [stderr] 28 | use log::{LogLevel, LogMetadata, LogRecord};
[INFO] [stderr]    |           ^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^ no `LogRecord` in the root
[INFO] [stderr]    |           |         |
[INFO] [stderr]    |           |         no `LogMetadata` in the root
[INFO] [stderr]    |           no `LogLevel` in the root
[INFO] [stderr]    |
[INFO] [stderr] help: a similar name exists in the module
[INFO] [stderr]    |
[INFO] [stderr] 28 | use log::{LogLevel, Metadata, LogRecord};
[INFO] [stderr]    |                     ^^^^^^^^
[INFO] [stderr] help: a similar name exists in the module
[INFO] [stderr]    |
[INFO] [stderr] 28 | use log::{LogLevel, LogMetadata, Record};
[INFO] [stderr]    |                                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | #[macro_use] extern crate log;
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:36:18
[INFO] [stderr]    |
[INFO] [stderr] 36 |   predictor: Box<Predictor>,
[INFO] [stderr]    |                  ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:40:25
[INFO] [stderr]    |
[INFO] [stderr] 40 |   explorer_factory: Box<ExplorerFactory>,
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ExplorerFactory`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:56:22
[INFO] [stderr]    |
[INFO] [stderr] 56 |       predictor: Box<Predictor>,
[INFO] [stderr]    |                      ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent.rs:57:29
[INFO] [stderr]    |
[INFO] [stderr] 57 |       explorer_factory: Box<ExplorerFactory>) -> Self {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ExplorerFactory`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/environment/environment.rs:43:19
[INFO] [stderr]    |
[INFO] [stderr] 43 |   random: &'a mut Random,
[INFO] [stderr]    |                   ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/environment/environment.rs:54:30
[INFO] [stderr]    |
[INFO] [stderr] 54 |   pub fn new(random: &'a mut Random) -> CoinFlip<'a> {
[INFO] [stderr]    |                              ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:32:33
[INFO] [stderr]    |
[INFO] [stderr] 32 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a>;
[INFO] [stderr]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:32:51
[INFO] [stderr]    |
[INFO] [stderr] 32 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a>;
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^ help: use `dyn`: `dyn Explorer + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:34:21
[INFO] [stderr]    |
[INFO] [stderr] 34 |       &self) -> Box<Explorer>;
[INFO] [stderr]    |                     ^^^^^^^^ help: use `dyn`: `dyn Explorer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:45:33
[INFO] [stderr]    |
[INFO] [stderr] 45 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a> {
[INFO] [stderr]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:45:51
[INFO] [stderr]    |
[INFO] [stderr] 45 |       &self, predictor: &'a mut Predictor) -> Box<Explorer + 'a> {
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^ help: use `dyn`: `dyn Explorer + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/explorer_factory.rs:49:43
[INFO] [stderr]    |
[INFO] [stderr] 49 |   fn create_random_explorer(&self) -> Box<Explorer> {
[INFO] [stderr]    |                                           ^^^^^^^^ help: use `dyn`: `dyn Explorer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/monte_carlo_explorer.rs:28:22
[INFO] [stderr]    |
[INFO] [stderr] 28 |   predictor: &'a mut Predictor,
[INFO] [stderr]    |                      ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/monte_carlo_explorer.rs:32:30
[INFO] [stderr]    |
[INFO] [stderr] 32 |   pub fn new(predictor: &mut Predictor) -> MonteCarloExplorer {
[INFO] [stderr]    |                              ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/random_explorer.rs:28:15
[INFO] [stderr]    |
[INFO] [stderr] 28 |   random: Box<Random>
[INFO] [stderr]    |               ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/explorer/random_explorer.rs:32:26
[INFO] [stderr]    |
[INFO] [stderr] 32 |   pub fn new(random: Box<Random>) -> RandomExplorer {
[INFO] [stderr]    |                          ^^^^^^ help: use `dyn`: `dyn Random`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent_test.rs:82:30
[INFO] [stderr]    |
[INFO] [stderr] 82 |       &self, predictor: &mut Predictor) -> Box<Explorer> {
[INFO] [stderr]    |                              ^^^^^^^^^ help: use `dyn`: `dyn Predictor`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent_test.rs:82:48
[INFO] [stderr]    |
[INFO] [stderr] 82 |       &self, predictor: &mut Predictor) -> Box<Explorer> {
[INFO] [stderr]    |                                                ^^^^^^^^ help: use `dyn`: `dyn Explorer`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/agent_test.rs:87:43
[INFO] [stderr]    |
[INFO] [stderr] 87 |   fn create_random_explorer(&self) -> Box<Explorer> {
[INFO] [stderr]    |                                           ^^^^^^^^ help: use `dyn`: `dyn Explorer`
[INFO] [stderr] 
[INFO] [stderr] error[E0046]: not all trait items implemented, missing: `flush`
[INFO] [stderr]   --> src/logger.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl log::Log for StdoutLogger {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `flush` in implementation
[INFO] [stderr]    |
[INFO] [stderr]    = help: implement the missing item: `fn flush(&self) { todo!() }`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0046, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0046`.
[INFO] [stderr] error: could not compile `ai`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0046, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0046`.
[INFO] [stderr] error: could not compile `ai`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7c78bc8d2e3f019f55545638385ad686ee151285be1ca056cdeba1817cc5e452"`
[INFO] running `"docker" "rm" "-f" "7c78bc8d2e3f019f55545638385ad686ee151285be1ca056cdeba1817cc5e452"`
[INFO] [stdout] 7c78bc8d2e3f019f55545638385ad686ee151285be1ca056cdeba1817cc5e452
