[INFO] cloning repository https://github.com/Alec-xdu/rust_study_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Alec-xdu/rust_study_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlec-xdu%2Frust_study_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlec-xdu%2Frust_study_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66658c816473a540a324e6cf11a51fa64d2f3444
[INFO] testing Alec-xdu/rust_study_demo against try#9f93af291970322f4f1c6315ccde4d7078201159 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlec-xdu%2Frust_study_demo" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Alec-xdu/rust_study_demo
[INFO] finished tweaking git repo https://github.com/Alec-xdu/rust_study_demo
[INFO] tweaked toml for git repo https://github.com/Alec-xdu/rust_study_demo written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Alec-xdu/rust_study_demo on toolchain 9f93af291970322f4f1c6315ccde4d7078201159
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Alec-xdu/rust_study_demo 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" "+9f93af291970322f4f1c6315ccde4d7078201159" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a31ebb8f328127e235e95c3af5944ad4d17c18fdce66046c3340ae6c67281e3
[INFO] running `Command { std: "docker" "start" "-a" "0a31ebb8f328127e235e95c3af5944ad4d17c18fdce66046c3340ae6c67281e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a31ebb8f328127e235e95c3af5944ad4d17c18fdce66046c3340ae6c67281e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a31ebb8f328127e235e95c3af5944ad4d17c18fdce66046c3340ae6c67281e3", kill_on_drop: false }`
[INFO] [stdout] 0a31ebb8f328127e235e95c3af5944ad4d17c18fdce66046c3340ae6c67281e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bbbe8b4635bd0554a7ab79c2a159300795069216d0762ce5efc05974489c95e
[INFO] running `Command { std: "docker" "start" "-a" "3bbbe8b4635bd0554a7ab79c2a159300795069216d0762ce5efc05974489c95e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling zerocopy v0.8.24
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling doUp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut s = String::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let c = &a[1..2];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut s = String::new();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.82s
[INFO] running `Command { std: "docker" "inspect" "3bbbe8b4635bd0554a7ab79c2a159300795069216d0762ce5efc05974489c95e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bbbe8b4635bd0554a7ab79c2a159300795069216d0762ce5efc05974489c95e", kill_on_drop: false }`
[INFO] [stdout] 3bbbe8b4635bd0554a7ab79c2a159300795069216d0762ce5efc05974489c95e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e1f8d623a0dc4030d4563676cea1b9e8a7d3b03ab53b1a7006c96c143b5ad6f
[INFO] running `Command { std: "docker" "start" "-a" "5e1f8d623a0dc4030d4563676cea1b9e8a7d3b03ab53b1a7006c96c143b5ad6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling doUp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `String: Termination` is not satisfied
[INFO] [stdout]   --> src/main.rs:28:26
[INFO] [stdout]    |
[INFO] [stdout] 27 | #[test]
[INFO] [stdout]    | ------- in this attribute macro expansion
[INFO] [stdout] 28 | fn read_file_content() ->Result<String, io::Error> {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Termination` is not implemented for `String`
[INFO] [stdout]    |
[INFO] [stdout]    = note: required for `Result<String, std::io::Error>` to implement `Termination`
[INFO] [stdout] note: required by a bound in `assert_test_result`
[INFO] [stdout]   --> /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:265:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut s = String::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let c = &a[1..2];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut s = String::new();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doUp` (bin "doUp" test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5e1f8d623a0dc4030d4563676cea1b9e8a7d3b03ab53b1a7006c96c143b5ad6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e1f8d623a0dc4030d4563676cea1b9e8a7d3b03ab53b1a7006c96c143b5ad6f", kill_on_drop: false }`
[INFO] [stdout] 5e1f8d623a0dc4030d4563676cea1b9e8a7d3b03ab53b1a7006c96c143b5ad6f
