[INFO] cloning repository https://github.com/Nandem/Rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nandem/Rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6ba2518afb7cacb51835855bbd260bf98a628b1
[INFO] testing Nandem/Rust_learning against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning" "/workspace/builds/worker-32/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-32/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nandem/Rust_learning on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nandem/Rust_learning
[INFO] finished tweaking git repo https://github.com/Nandem/Rust_learning
[INFO] tweaked toml for git repo https://github.com/Nandem/Rust_learning written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] crate git repo https://github.com/Nandem/Rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 947fb5fae2fc1b2be83c52f499710d02d78163bc5a5a40a96d3b37211053c173
[INFO] running `Command { std: "docker" "start" "-a" "947fb5fae2fc1b2be83c52f499710d02d78163bc5a5a40a96d3b37211053c173", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "947fb5fae2fc1b2be83c52f499710d02d78163bc5a5a40a96d3b37211053c173", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "947fb5fae2fc1b2be83c52f499710d02d78163bc5a5a40a96d3b37211053c173", kill_on_drop: false }`
[INFO] [stdout] 947fb5fae2fc1b2be83c52f499710d02d78163bc5a5a40a96d3b37211053c173
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bf093153baafa46557243e1e7453ee8e0abfc3e610caaae1a68abee5e11e759
[INFO] running `Command { std: "docker" "start" "-a" "2bf093153baafa46557243e1e7453ee8e0abfc3e610caaae1a68abee5e11e759", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:39:49
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_username_from_file1() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:55:49
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn read_username_from_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:62:49
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn read_username_from_file3() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_to_string` found for struct `File` in the current scope
[INFO] [stdout]    --> src/errors/error1.rs:49:13
[INFO] [stdout]     |
[INFO] [stdout] 49  |     match f.read_to_string(&mut s) {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ method not found in `File`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_to_string` found for struct `File` in the current scope
[INFO] [stdout]    --> src/errors/error1.rs:58:7
[INFO] [stdout]     |
[INFO] [stdout] 58  |     f.read_to_string(&mut s)?;
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ method not found in `File`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_to_string` found for struct `File` in the current scope
[INFO] [stdout]    --> src/errors/error1.rs:65:30
[INFO] [stdout]     |
[INFO] [stdout] 65  |     File::open("hello.txt")?.read_to_string(&mut s)?;
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^ method not found in `File`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learning` due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "2bf093153baafa46557243e1e7453ee8e0abfc3e610caaae1a68abee5e11e759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bf093153baafa46557243e1e7453ee8e0abfc3e610caaae1a68abee5e11e759", kill_on_drop: false }`
[INFO] [stdout] 2bf093153baafa46557243e1e7453ee8e0abfc3e610caaae1a68abee5e11e759
