[INFO] fetching crate file-sniffer 3.0.1...
[INFO] testing file-sniffer-3.0.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate file-sniffer 3.0.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate file-sniffer 3.0.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking crates.io crate file-sniffer 3.0.1
[INFO] finished tweaking crates.io crate file-sniffer 3.0.1
[INFO] tweaked toml for crates.io crate file-sniffer 3.0.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-6/source/src/main.rs
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f678aacd80469b088e3e3f1ba82fa371d001da4168c457bd43d8e0f92dfa9468
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f678aacd80469b088e3e3f1ba82fa371d001da4168c457bd43d8e0f92dfa9468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f678aacd80469b088e3e3f1ba82fa371d001da4168c457bd43d8e0f92dfa9468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f678aacd80469b088e3e3f1ba82fa371d001da4168c457bd43d8e0f92dfa9468", kill_on_drop: false }`
[INFO] [stdout] f678aacd80469b088e3e3f1ba82fa371d001da4168c457bd43d8e0f92dfa9468
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a63b9b36a0f07835cb2c26aaf2e1ca0594738a0738fc670e6b8f740360a725f2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a63b9b36a0f07835cb2c26aaf2e1ca0594738a0738fc670e6b8f740360a725f2", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/src/main.rs
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling pad v0.1.6
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling ignore v0.2.2
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling file-sniffer v3.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `match_ref_pats`
[INFO] [stdout]  --> src/lib.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![allow(match_ref_pats)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `too_many_arguments`
[INFO] [stdout]  --> src/lib.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![allow(too_many_arguments)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(integer_atomics)] 
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lib.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 | / ...   lazy_static! {
[INFO] [stdout] 86 | | ...       static ref REGEX: Regex = 
[INFO] [stdout] 87 | | ...           Regex::new(r".*?\.(a|la|lo|o|ll|keter|bc|dyn_o|out|d|rlib|crate|min\.js|hi|dyn_hi|S|jsexe|webapp|js\.externs|ibc|toc|aux|fd...
[INFO] [stdout] 88 | | ...           .unwrap();
[INFO] [stdout] 89 | | ...   }
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lib.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 | /             lazy_static! {
[INFO] [stdout] 91 | |                 static ref REGEX_GITIGNORE: Regex = 
[INFO] [stdout] 92 | |                     Regex::new(r".*?\.(stats|conf|h|cache.*|dat|pc|info)$")
[INFO] [stdout] 93 | |                     .unwrap();
[INFO] [stdout] 94 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `file-sniffer`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a63b9b36a0f07835cb2c26aaf2e1ca0594738a0738fc670e6b8f740360a725f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a63b9b36a0f07835cb2c26aaf2e1ca0594738a0738fc670e6b8f740360a725f2", kill_on_drop: false }`
[INFO] [stdout] a63b9b36a0f07835cb2c26aaf2e1ca0594738a0738fc670e6b8f740360a725f2