[INFO] cloning repository https://github.com/andreisilviudragnea/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andreisilviudragnea/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2af02346f4c433507ce0f5968d3bed3192ef4362
[INFO] checking andreisilviudragnea/learning-rust against try#db4e1d23234d93b5e96ecc768b35d9090c32cddf for pr-149901
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/andreisilviudragnea/learning-rust
[INFO] finished tweaking git repo https://github.com/andreisilviudragnea/learning-rust
[INFO] tweaked toml for git repo https://github.com/andreisilviudragnea/learning-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/andreisilviudragnea/learning-rust on toolchain db4e1d23234d93b5e96ecc768b35d9090c32cddf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/andreisilviudragnea/learning-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" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking andreisilviudragnea/learning-rust against try#db4e1d23234d93b5e96ecc768b35d9090c32cddf for pr-149901
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/andreisilviudragnea/learning-rust
[INFO] finished tweaking git repo https://github.com/andreisilviudragnea/learning-rust
[INFO] tweaked toml for git repo https://github.com/andreisilviudragnea/learning-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/andreisilviudragnea/learning-rust on toolchain db4e1d23234d93b5e96ecc768b35d9090c32cddf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/andreisilviudragnea/learning-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" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e42c13edf1c897833603bfd0f820795637ac6175e1860354fc387ac1798d274
[INFO] running `Command { std: "docker" "start" "-a" "7e42c13edf1c897833603bfd0f820795637ac6175e1860354fc387ac1798d274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e42c13edf1c897833603bfd0f820795637ac6175e1860354fc387ac1798d274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e42c13edf1c897833603bfd0f820795637ac6175e1860354fc387ac1798d274", kill_on_drop: false }`
[INFO] [stdout] 7e42c13edf1c897833603bfd0f820795637ac6175e1860354fc387ac1798d274
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb89573068369b190c6a9998d260e798dba77c1768cee7ccd1c395957fb3433f
[INFO] running `Command { std: "docker" "start" "-a" "bb89573068369b190c6a9998d260e798dba77c1768cee7ccd1c395957fb3433f", kill_on_drop: false }`
[INFO] [stderr]     Checking pin-project-lite v0.2.12
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking parking_lot_core v0.9.7
[INFO] [stderr]     Checking mio v1.0.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]     Checking tokio v1.48.0
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `option_function_first_none_no_return` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn option_function_first_none_no_return(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_none_no_return_after_fix` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn option_function_first_none_no_return_after_fix(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_return` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn option_function_first_some_no_return(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_return_after_fix` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn option_function_first_some_no_return_after_fix(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_match_components_no_return` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn option_function_first_some_no_match_components_no_return(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_match_components_no_return_after_fix` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn option_function_first_some_no_match_components_no_return_after_fix(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_none_no_return` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn option_function_first_none_no_return(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_none_no_return_after_fix` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn option_function_first_none_no_return_after_fix(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_return` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn option_function_first_some_no_return(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_return_after_fix` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn option_function_first_some_no_return_after_fix(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_match_components_no_return` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn option_function_first_some_no_match_components_no_return(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_function_first_some_no_match_components_no_return_after_fix` is never used
[INFO] [stdout]   --> src/clippy/question_mark.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn option_function_first_some_no_match_components_no_return_after_fix(input: Option<String>) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused logical operation that must be used
[INFO] [stdout]   --> src/scope.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | /         *t1 && {
[INFO] [stdout] 14 | |             let t2 = x.borrow_mut();
[INFO] [stdout] 15 | |             *t2
[INFO] [stdout] 16 | |         }
[INFO] [stdout]    | |_________^ the logical operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 ~         let _ = *t1 && {
[INFO] [stdout] 14 |             let t2 = x.borrow_mut();
[INFO] [stdout] 15 |             *t2
[INFO] [stdout] 16 ~         };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused logical operation that must be used
[INFO] [stdout]   --> src/scope.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | /         *t1 && {
[INFO] [stdout] 14 | |             let t2 = x.borrow_mut();
[INFO] [stdout] 15 | |             *t2
[INFO] [stdout] 16 | |         }
[INFO] [stdout]    | |_________^ the logical operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 ~         let _ = *t1 && {
[INFO] [stdout] 14 |             let t2 = x.borrow_mut();
[INFO] [stdout] 15 |             *t2
[INFO] [stdout] 16 ~         };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.89s
[INFO] running `Command { std: "docker" "inspect" "bb89573068369b190c6a9998d260e798dba77c1768cee7ccd1c395957fb3433f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb89573068369b190c6a9998d260e798dba77c1768cee7ccd1c395957fb3433f", kill_on_drop: false }`
[INFO] [stdout] bb89573068369b190c6a9998d260e798dba77c1768cee7ccd1c395957fb3433f
