[INFO] cloning repository https://github.com/LucianoBestia/unsafe_features_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LucianoBestia/unsafe_features_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucianoBestia%2Funsafe_features_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucianoBestia%2Funsafe_features_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a3fa7f3761db17360af8cadfc1cb4bae14b5a22
[INFO] testing LucianoBestia/unsafe_features_example against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucianoBestia%2Funsafe_features_example" "/workspace/builds/worker-85/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-85/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LucianoBestia/unsafe_features_example on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LucianoBestia/unsafe_features_example
[INFO] finished tweaking git repo https://github.com/LucianoBestia/unsafe_features_example
[INFO] tweaked toml for git repo https://github.com/LucianoBestia/unsafe_features_example written to /workspace/builds/worker-85/source/Cargo.toml
[INFO] crate git repo https://github.com/LucianoBestia/unsafe_features_example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11709ef4b9138706bdff7dd1071c473af53be860bc46511d28d4ac4bff7c4458
[INFO] running `Command { std: "docker" "start" "-a" "11709ef4b9138706bdff7dd1071c473af53be860bc46511d28d4ac4bff7c4458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11709ef4b9138706bdff7dd1071c473af53be860bc46511d28d4ac4bff7c4458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11709ef4b9138706bdff7dd1071c473af53be860bc46511d28d4ac4bff7c4458", kill_on_drop: false }`
[INFO] [stdout] 11709ef4b9138706bdff7dd1071c473af53be860bc46511d28d4ac4bff7c4458
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f638efc84c8ebd7288ea6c294ab2e6a345bf795d0fdd1c11ae775ff2738d9ec
[INFO] running `Command { std: "docker" "start" "-a" "6f638efc84c8ebd7288ea6c294ab2e6a345bf795d0fdd1c11ae775ff2738d9ec", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling library v0.0.1 (/opt/rustwide/workdir/library)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> library/src/read_lyrics_mod.rs:5:13
[INFO] [stdout]    |
[INFO] [stdout] 5  | /             /// every unsafe should have a doc-comment, to describe what it does
[INFO] [stdout] 6  | |             /// this unsafe reads from "sample_data/songs/basket_case_green_day.txt"
[INFO] [stdout] 7  | |             /// one idea how to force the existence of "unsafe feature"
[INFO] [stdout] 8  | |             ///    unsafe( "unsafe_feature_read_song"){...}
[INFO] [stdout]    | |___________________________________________________________^
[INFO] [stdout] 9  | /             unsafe{
[INFO] [stdout] 10 | |                 let path = "sample_data/songs/basket_case_green_day.txt";
[INFO] [stdout] 11 | |                 // std::fs should be "unsafe"
[INFO] [stdout] 12 | |                 // therefore the code must be under a namespace of "unsafe features"
[INFO] [stdout] 13 | |                 file_content = std::fs::read_to_string(path).unwrap();
[INFO] [stdout] 14 | |             }
[INFO] [stdout]    | |_____________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]  --> library/src/read_lyrics_mod.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             unsafe{
[INFO] [stdout]   |             ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_private_key`
[INFO] [stdout]   --> library/src/read_private_key_mod.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn read_private_key()->String {"no feature, no access.".to_string()}
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling client1 v0.0.1 (/opt/rustwide/workdir/client1)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.57s
[INFO] running `Command { std: "docker" "inspect" "6f638efc84c8ebd7288ea6c294ab2e6a345bf795d0fdd1c11ae775ff2738d9ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f638efc84c8ebd7288ea6c294ab2e6a345bf795d0fdd1c11ae775ff2738d9ec", kill_on_drop: false }`
[INFO] [stdout] 6f638efc84c8ebd7288ea6c294ab2e6a345bf795d0fdd1c11ae775ff2738d9ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 403a56f52506be431cc94d59a3bb256e71b7d6d9e526da9e6aeef1151ede7608
[INFO] running `Command { std: "docker" "start" "-a" "403a56f52506be431cc94d59a3bb256e71b7d6d9e526da9e6aeef1151ede7608", kill_on_drop: false }`
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> library/src/read_lyrics_mod.rs:5:13
[INFO] [stdout]    |
[INFO] [stdout] 5  | /             /// every unsafe should have a doc-comment, to describe what it does
[INFO] [stdout] 6  | |             /// this unsafe reads from "sample_data/songs/basket_case_green_day.txt"
[INFO] [stdout] 7  | |             /// one idea how to force the existence of "unsafe feature"
[INFO] [stdout] 8  | |             ///    unsafe( "unsafe_feature_read_song"){...}
[INFO] [stdout]    | |___________________________________________________________^
[INFO] [stdout] 9  | /             unsafe{
[INFO] [stdout] 10 | |                 let path = "sample_data/songs/basket_case_green_day.txt";
[INFO] [stdout] 11 | |                 // std::fs should be "unsafe"
[INFO] [stdout] 12 | |                 // therefore the code must be under a namespace of "unsafe features"
[INFO] [stdout] 13 | |                 file_content = std::fs::read_to_string(path).unwrap();
[INFO] [stdout] 14 | |             }
[INFO] [stdout]    | |_____________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]  --> library/src/read_lyrics_mod.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             unsafe{
[INFO] [stdout]   |             ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_private_key`
[INFO] [stdout]   --> library/src/read_private_key_mod.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn read_private_key()->String {"no feature, no access.".to_string()}
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling library v0.0.1 (/opt/rustwide/workdir/library)
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling client1 v0.0.1 (/opt/rustwide/workdir/client1)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> library/src/read_lyrics_mod.rs:5:13
[INFO] [stdout]    |
[INFO] [stdout] 5  | /             /// every unsafe should have a doc-comment, to describe what it does
[INFO] [stdout] 6  | |             /// this unsafe reads from "sample_data/songs/basket_case_green_day.txt"
[INFO] [stdout] 7  | |             /// one idea how to force the existence of "unsafe feature"
[INFO] [stdout] 8  | |             ///    unsafe( "unsafe_feature_read_song"){...}
[INFO] [stdout]    | |___________________________________________________________^
[INFO] [stdout] 9  | /             unsafe{
[INFO] [stdout] 10 | |                 let path = "sample_data/songs/basket_case_green_day.txt";
[INFO] [stdout] 11 | |                 // std::fs should be "unsafe"
[INFO] [stdout] 12 | |                 // therefore the code must be under a namespace of "unsafe features"
[INFO] [stdout] 13 | |                 file_content = std::fs::read_to_string(path).unwrap();
[INFO] [stdout] 14 | |             }
[INFO] [stdout]    | |_____________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]  --> library/src/read_lyrics_mod.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             unsafe{
[INFO] [stdout]   |             ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_private_key`
[INFO] [stdout]   --> library/src/read_private_key_mod.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn read_private_key()->String {"no feature, no access.".to_string()}
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "403a56f52506be431cc94d59a3bb256e71b7d6d9e526da9e6aeef1151ede7608", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "403a56f52506be431cc94d59a3bb256e71b7d6d9e526da9e6aeef1151ede7608", kill_on_drop: false }`
[INFO] [stdout] 403a56f52506be431cc94d59a3bb256e71b7d6d9e526da9e6aeef1151ede7608
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 98b9a034f26b0c5c88fa69c5a44ee5b9eab63911a0439f5b3b0c87e23eba4862
[INFO] running `Command { std: "docker" "start" "-a" "98b9a034f26b0c5c88fa69c5a44ee5b9eab63911a0439f5b3b0c87e23eba4862", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> library/src/read_lyrics_mod.rs:5:13
[INFO] [stderr]    |
[INFO] [stderr] 5  | /             /// every unsafe should have a doc-comment, to describe what it does
[INFO] [stderr] 6  | |             /// this unsafe reads from "sample_data/songs/basket_case_green_day.txt"
[INFO] [stderr] 7  | |             /// one idea how to force the existence of "unsafe feature"
[INFO] [stderr] 8  | |             ///    unsafe( "unsafe_feature_read_song"){...}
[INFO] [stderr]    | |___________________________________________________________^
[INFO] [stderr] 9  | /             unsafe{
[INFO] [stderr] 10 | |                 let path = "sample_data/songs/basket_case_green_day.txt";
[INFO] [stderr] 11 | |                 // std::fs should be "unsafe"
[INFO] [stderr] 12 | |                 // therefore the code must be under a namespace of "unsafe features"
[INFO] [stderr] 13 | |                 file_content = std::fs::read_to_string(path).unwrap();
[INFO] [stderr] 14 | |             }
[INFO] [stderr]    | |_____________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]  --> library/src/read_lyrics_mod.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |             unsafe{
[INFO] [stderr]   |             ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_private_key`
[INFO] [stderr]   --> library/src/read_private_key_mod.rs:20:16
[INFO] [stderr]    |
[INFO] [stderr] 20 |         pub fn read_private_key()->String {"no feature, no access.".to_string()}
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `library` (lib) generated 3 warnings
[INFO] [stderr] warning: `library` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.13s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/client1-52c5ca1cd6e3ea7a)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/library-8aeeb43c1efbcb8e)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests library
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "98b9a034f26b0c5c88fa69c5a44ee5b9eab63911a0439f5b3b0c87e23eba4862", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b9a034f26b0c5c88fa69c5a44ee5b9eab63911a0439f5b3b0c87e23eba4862", kill_on_drop: false }`
[INFO] [stdout] 98b9a034f26b0c5c88fa69c5a44ee5b9eab63911a0439f5b3b0c87e23eba4862