[INFO] cloning repository https://github.com/AhmedAlyElGhannam/too-many-rusty-lists
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AhmedAlyElGhannam/too-many-rusty-lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAhmedAlyElGhannam%2Ftoo-many-rusty-lists", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAhmedAlyElGhannam%2Ftoo-many-rusty-lists'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf41ca52d2c0864aaabbaa292c0ecfa6697123aa
[INFO] checking AhmedAlyElGhannam/too-many-rusty-lists against try#5d96fa0e954d77528204a1ba3b8847ec083c779b for pr-153457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAhmedAlyElGhannam%2Ftoo-many-rusty-lists" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AhmedAlyElGhannam/too-many-rusty-lists
[INFO] finished tweaking git repo https://github.com/AhmedAlyElGhannam/too-many-rusty-lists
[INFO] tweaked toml for git repo https://github.com/AhmedAlyElGhannam/too-many-rusty-lists written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AhmedAlyElGhannam/too-many-rusty-lists on toolchain 5d96fa0e954d77528204a1ba3b8847ec083c779b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AhmedAlyElGhannam/too-many-rusty-lists 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" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0371089836e28bad8aa8ab796387cdac102b49dae714037b2ad39a6bd308fab9
[INFO] running `Command { std: "docker" "start" "-a" "0371089836e28bad8aa8ab796387cdac102b49dae714037b2ad39a6bd308fab9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0371089836e28bad8aa8ab796387cdac102b49dae714037b2ad39a6bd308fab9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0371089836e28bad8aa8ab796387cdac102b49dae714037b2ad39a6bd308fab9", kill_on_drop: false }`
[INFO] [stdout] 0371089836e28bad8aa8ab796387cdac102b49dae714037b2ad39a6bd308fab9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35c412d5c3a319ea9a352419794d6ebb3eafd780e1c2412750c5e75c458b7b9a
[INFO] running `Command { std: "docker" "start" "-a" "35c412d5c3a319ea9a352419794d6ebb3eafd780e1c2412750c5e75c458b7b9a", kill_on_drop: false }`
[INFO] [stderr]     Checking too-many-rusty-lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find type `Iter` in this scope
[INFO] [stdout]   --> src/fourth.rs:58:27
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn iter(&self) -> Iter<T> {
[INFO] [stdout]    |                           ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these structs
[INFO] [stdout]    |
[INFO] [stdout]  4 + use crate::second::Iter;
[INFO] [stdout]    |
[INFO] [stdout]  4 + use std::collections::binary_heap::Iter;
[INFO] [stdout]    |
[INFO] [stdout]  4 + use std::collections::btree_map::Iter;
[INFO] [stdout]    |
[INFO] [stdout]  4 + use std::collections::btree_set::Iter;
[INFO] [stdout]    |
[INFO] [stdout]    = and 13 other candidates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/third.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `Iter` in this scope
[INFO] [stdout]   --> src/fourth.rs:58:27
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn iter(&self) -> Iter<T> {
[INFO] [stdout]    |                           ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these structs
[INFO] [stdout]    |
[INFO] [stdout]  4 + use crate::second::Iter;
[INFO] [stdout]    |
[INFO] [stdout]  4 + use std::collections::binary_heap::Iter;
[INFO] [stdout]    |
[INFO] [stdout]  4 + use std::collections::btree_map::Iter;
[INFO] [stdout]    |
[INFO] [stdout]  4 + use std::collections::btree_set::Iter;
[INFO] [stdout]    |
[INFO] [stdout]    = and 13 other candidates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/third.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Iter` in this scope
[INFO] [stdout]   --> src/fourth.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Iter(self.head.as_ref().map(|head| head.borrow()))
[INFO] [stdout]    |         ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Iter` in this scope
[INFO] [stdout]   --> src/fourth.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Iter(self.head.as_ref().map(|head| head.borrow()))
[INFO] [stdout]    |         ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `too-many-rusty-lists` (lib) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `too-many-rusty-lists` (lib test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "35c412d5c3a319ea9a352419794d6ebb3eafd780e1c2412750c5e75c458b7b9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35c412d5c3a319ea9a352419794d6ebb3eafd780e1c2412750c5e75c458b7b9a", kill_on_drop: false }`
[INFO] [stdout] 35c412d5c3a319ea9a352419794d6ebb3eafd780e1c2412750c5e75c458b7b9a