[INFO] updating cached repository https://github.com/sakateka/plt
[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] 367a6f8c57682122c8cc7e9203e64788c5669c9f
[INFO] checking sakateka/plt against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsakateka%2Fplt" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sakateka/plt on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/sakateka/plt
[INFO] finished tweaking git repo https://github.com/sakateka/plt
[INFO] tweaked toml for git repo https://github.com/sakateka/plt written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/sakateka/plt already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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] 9b5d8deb44e7a9446c61e8cb8b23f0b41ed7dc6e47974fa4836ea6e66aa7ccdf
[INFO] running `"docker" "start" "-a" "9b5d8deb44e7a9446c61e8cb8b23f0b41ed7dc6e47974fa4836ea6e66aa7ccdf"`
[INFO] [stderr]     Checking serde v1.0.35
[INFO] [stderr]     Checking itertools v0.7.7
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]    Compiling serde_derive_internals v0.22.1
[INFO] [stderr]    Compiling serde_derive v1.0.35
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]     Checking plt v5.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/dfa.rs:313:36
[INFO] [stderr]     |
[INFO] [stderr] 313 |     pub fn check(&self, input: Box<Read>, show_path: bool) -> io::Result<()> {
[INFO] [stderr]     |                                    ^^^^ help: use `dyn`: `dyn Read`
[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/main.rs:34:50
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn get_output_stream(x: Option<&str>) -> Box<Write> {
[INFO] [stderr]    |                                                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:38:59
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Box::new(File::create(&path).unwrap()) as Box<Write>
[INFO] [stderr]    |                                                           ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:40:47
[INFO] [stderr]    |
[INFO] [stderr] 40 |         None => Box::new(io::stdout()) as Box<Write>,
[INFO] [stderr]    |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:44:49
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn get_input_stream(x: Option<&str>) -> Box<Read> {
[INFO] [stderr]    |                                                 ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:48:59
[INFO] [stderr]    |
[INFO] [stderr] 48 |             Box::new(File::create(&path).unwrap()) as Box<Read>
[INFO] [stderr]    |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/dfa.rs:313:36
[INFO] [stderr]     |
[INFO] [stderr] 313 |     pub fn check(&self, input: Box<Read>, show_path: bool) -> io::Result<()> {
[INFO] [stderr]     |                                    ^^^^ help: use `dyn`: `dyn Read`
[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/main.rs:50:46
[INFO] [stderr]    |
[INFO] [stderr] 50 |         None => Box::new(io::stdin()) as Box<Read>,
[INFO] [stderr]    |                                              ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:34:50
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn get_output_stream(x: Option<&str>) -> Box<Write> {
[INFO] [stderr]    |                                                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:38:59
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Box::new(File::create(&path).unwrap()) as Box<Write>
[INFO] [stderr]    |                                                           ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:40:47
[INFO] [stderr]    |
[INFO] [stderr] 40 |         None => Box::new(io::stdout()) as Box<Write>,
[INFO] [stderr]    |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:44:49
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn get_input_stream(x: Option<&str>) -> Box<Read> {
[INFO] [stderr]    |                                                 ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:48:59
[INFO] [stderr]    |
[INFO] [stderr] 48 |             Box::new(File::create(&path).unwrap()) as Box<Read>
[INFO] [stderr]    |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:50:46
[INFO] [stderr]    |
[INFO] [stderr] 50 |         None => Box::new(io::stdin()) as Box<Read>,
[INFO] [stderr]    |                                              ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] error[E0284]: type annotations needed: cannot resolve `<std::string::String as std::ops::Add<&_>>::Output == std::string::String`
[INFO] [stderr]   --> src/generator.rs:24:57
[INFO] [stderr]    |
[INFO] [stderr] 24 |                 .fold(String::new(), |acc, ref arg| acc + arg.to_string().as_ref())
[INFO] [stderr]    |                                                         ^
[INFO] [stderr] 
[INFO] [stderr] error[E0284]: type annotations needed: cannot resolve `<std::string::String as std::ops::Add<&_>>::Output == std::string::String`
[INFO] [stderr]   --> src/generator.rs:24:57
[INFO] [stderr]    |
[INFO] [stderr] 24 |                 .fold(String::new(), |acc, ref arg| acc + arg.to_string().as_ref())
[INFO] [stderr]    |                                                         ^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0284`.
[INFO] [stderr] error: could not compile `plt`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0284`.
[INFO] [stderr] error: could not compile `plt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9b5d8deb44e7a9446c61e8cb8b23f0b41ed7dc6e47974fa4836ea6e66aa7ccdf"`
[INFO] running `"docker" "rm" "-f" "9b5d8deb44e7a9446c61e8cb8b23f0b41ed7dc6e47974fa4836ea6e66aa7ccdf"`
[INFO] [stdout] 9b5d8deb44e7a9446c61e8cb8b23f0b41ed7dc6e47974fa4836ea6e66aa7ccdf