[INFO] cloning repository https://github.com/mjbenitez95/rust-error-handling
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mjbenitez95/rust-error-handling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72e255eebe1cd47e9477bb6c4d201a48c9f3df44
[INFO] checking mjbenitez95/rust-error-handling against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmjbenitez95%2Frust-error-handling" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mjbenitez95/rust-error-handling
[INFO] finished tweaking git repo https://github.com/mjbenitez95/rust-error-handling
[INFO] tweaked toml for git repo https://github.com/mjbenitez95/rust-error-handling written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mjbenitez95/rust-error-handling on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mjbenitez95/rust-error-handling 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 064345451f74a0fa417fd450bd9aebe9fe5aff3c5bb4d6f8b5f33df2dc4a54f8
[INFO] running `Command { std: "docker" "start" "-a" "064345451f74a0fa417fd450bd9aebe9fe5aff3c5bb4d6f8b5f33df2dc4a54f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "064345451f74a0fa417fd450bd9aebe9fe5aff3c5bb4d6f8b5f33df2dc4a54f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "064345451f74a0fa417fd450bd9aebe9fe5aff3c5bb4d6f8b5f33df2dc4a54f8", kill_on_drop: false }`
[INFO] [stdout] 064345451f74a0fa417fd450bd9aebe9fe5aff3c5bb4d6f8b5f33df2dc4a54f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 07e3437177ed526096a5ecf328ab727e9060d21f00b6d7947b679e5c40f33861
[INFO] running `Command { std: "docker" "start" "-a" "07e3437177ed526096a5ecf328ab727e9060d21f00b6d7947b679e5c40f33861", kill_on_drop: false }`
[INFO] [stderr]     Checking error_handling v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:88:36
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn read_user_name_but_concise() -> Result<String, io::Error> {
[INFO] [stdout]    |    --------------------------      ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<String, Error>`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] ...
[INFO] [stdout] 98 |     Ok(s);
[INFO] [stdout]    |          - help: remove this semicolon to return this value
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Result<String, std::io::Error>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:101:41
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn read_user_name_but_more_concise() -> Result<String, io::Error> {
[INFO] [stdout]     |    -------------------------------      ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<String, Error>`, found `()`
[INFO] [stdout]     |    |
[INFO] [stdout]     |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] ...
[INFO] [stdout] 107 |     Ok(s);
[INFO] [stdout]     |          - help: remove this semicolon to return this value
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected enum `Result<String, std::io::Error>`
[INFO] [stdout]             found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let f = File::open(&file_name).expect("Failed to open good-morning.txt.");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `error_handling` (bin "error_handling" test) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:88:36
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn read_user_name_but_concise() -> Result<String, io::Error> {
[INFO] [stdout]    |    --------------------------      ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<String, Error>`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] ...
[INFO] [stdout] 98 |     Ok(s);
[INFO] [stdout]    |          - help: remove this semicolon to return this value
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Result<String, std::io::Error>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:101:41
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn read_user_name_but_more_concise() -> Result<String, io::Error> {
[INFO] [stdout]     |    -------------------------------      ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<String, Error>`, found `()`
[INFO] [stdout]     |    |
[INFO] [stdout]     |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] ...
[INFO] [stdout] 107 |     Ok(s);
[INFO] [stdout]     |          - help: remove this semicolon to return this value
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected enum `Result<String, std::io::Error>`
[INFO] [stdout]             found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let f = File::open(&file_name).expect("Failed to open good-morning.txt.");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `error_handling` (bin "error_handling") due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "07e3437177ed526096a5ecf328ab727e9060d21f00b6d7947b679e5c40f33861", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07e3437177ed526096a5ecf328ab727e9060d21f00b6d7947b679e5c40f33861", kill_on_drop: false }`
[INFO] [stdout] 07e3437177ed526096a5ecf328ab727e9060d21f00b6d7947b679e5c40f33861