[INFO] cloning repository https://github.com/brianobot/idiomatic_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brianobot/idiomatic_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianobot%2Fidiomatic_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianobot%2Fidiomatic_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 850c6e8e787dcb96488bcc8d67f9eea71179e6be
[INFO] fixing brianobot/idiomatic_rust against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianobot%2Fidiomatic_rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/brianobot/idiomatic_rust
[INFO] finished tweaking git repo https://github.com/brianobot/idiomatic_rust
[INFO] tweaked toml for git repo https://github.com/brianobot/idiomatic_rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brianobot/idiomatic_rust on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brianobot/idiomatic_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "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-5-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97
[INFO] running `Command { std: "docker" "start" "80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]     Checking idiomatic_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `rc::Weak` and `sync::Arc`
[INFO] [stdout]  --> src/bin/04_metaprogramming.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{rc::Weak, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/05_observer_pattern.rs:48:29
[INFO] [stdout]    |
[INFO] [stdout] 48 |         self.observers.push(Arc::downgrade(&observer));
[INFO] [stdout]    |                        ---- ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Weak<dyn Observer<Subject = Subject>>`, found a different `Weak<dyn Observer<Subject = Subject>>`
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        arguments to this method are incorrect
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::rc::Weak<(dyn Observer<Subject = Subject> + 'static)>`
[INFO] [stdout]               found struct `std::sync::Weak<dyn Observer<Subject = Subject>>`
[INFO] [stdout] note: method defined here
[INFO] [stdout]   --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/alloc/src/vec/mod.rs:1003:11
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/05_observer_pattern.rs:55:31
[INFO] [stdout]    |
[INFO] [stdout] 55 |                     !f.ptr_eq(&Arc::downgrade(&observer))
[INFO] [stdout]    |                        ------ ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Weak<dyn Observer<Subject = Subject>>`, found a different `Weak<dyn Observer<Subject = Subject>>`
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        arguments to this method are incorrect
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&std::rc::Weak<dyn Observer<Subject = Subject>>`
[INFO] [stdout]               found reference `&std::sync::Weak<dyn Observer<Subject = Subject>>`
[INFO] [stdout] note: method defined here
[INFO] [stdout]   --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/alloc/src/rc.rs:3643:11
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `rc::Weak` and `sync::Arc`
[INFO] [stdout]  --> src/bin/04_metaprogramming.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{rc::Weak, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `idiomatic_rust` (bin "05_observer_pattern") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97", kill_on_drop: false }`
[INFO] [stdout] 80cdd303914f554545dfd6647eac7a869b20c2a16619d92d419284b6740e2a97
