[INFO] fetching crate riffol 0.3.0...
[INFO] testing riffol-0.3.0 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate riffol 0.3.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate riffol 0.3.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate riffol 0.3.0
[INFO] finished tweaking crates.io crate riffol 0.3.0
[INFO] tweaked toml for crates.io crate riffol 0.3.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syslog v4.0.1
[INFO] [stderr]   Downloaded nereon_derive v0.4.3
[INFO] [stderr]   Downloaded nereon v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d966bc51c0b48a84b54a55c552375690a11c9dec7ce2959a4bf025ea663b02bb
[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" "d966bc51c0b48a84b54a55c552375690a11c9dec7ce2959a4bf025ea663b02bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d966bc51c0b48a84b54a55c552375690a11c9dec7ce2959a4bf025ea663b02bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d966bc51c0b48a84b54a55c552375690a11c9dec7ce2959a4bf025ea663b02bb", kill_on_drop: false }`
[INFO] [stdout] d966bc51c0b48a84b54a55c552375690a11c9dec7ce2959a4bf025ea663b02bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e985440358346570cb7846f71be4f2b9abe87613ce9575912de8b9efa7476cc7
[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" "e985440358346570cb7846f71be4f2b9abe87613ce9575912de8b9efa7476cc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling signal-hook v0.1.16
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling nereon_derive v0.4.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling stderrlog v0.4.3
[INFO] [stderr]    Compiling syslog v4.0.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling crossbeam-channel v0.2.6
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling nereon v0.4.4
[INFO] [stderr]    Compiling riffol v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/signal.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 25 | use libc;
[INFO] [stdout]    |     ---- the item `libc` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 33 |         use libc;
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/health.rs:149:38
[INFO] [stdout]     |
[INFO] [stdout] 149 |             let mut stats: statvfs = ::std::mem::uninitialized();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::os::unix::process::CommandExt::before_exec`: should be unsafe, use `pre_exec` instead
[INFO] [stdout]    --> src/application.rs:289:14
[INFO] [stdout]     |
[INFO] [stdout] 289 |             .before_exec(move || {
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:176:21
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut connection = connections.get_mut(handle).unwrap();
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:195:21
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 let mut connection = connections.remove(handle);
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:243:17
[INFO] [stdout]     |
[INFO] [stdout] 243 |             let mut logger: syslog::Result<
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.33s
[INFO] running `Command { std: "docker" "inspect" "e985440358346570cb7846f71be4f2b9abe87613ce9575912de8b9efa7476cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e985440358346570cb7846f71be4f2b9abe87613ce9575912de8b9efa7476cc7", kill_on_drop: false }`
[INFO] [stdout] e985440358346570cb7846f71be4f2b9abe87613ce9575912de8b9efa7476cc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31cb7249cf173741024ef238452d7ada89097da7317cfa60966522fb03d77490
[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" "31cb7249cf173741024ef238452d7ada89097da7317cfa60966522fb03d77490", kill_on_drop: false }`
[INFO] [stderr]    Compiling riffol v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/signal.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 25 | use libc;
[INFO] [stdout]    |     ---- the item `libc` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 33 |         use libc;
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/health.rs:149:38
[INFO] [stdout]     |
[INFO] [stdout] 149 |             let mut stats: statvfs = ::std::mem::uninitialized();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::os::unix::process::CommandExt::before_exec`: should be unsafe, use `pre_exec` instead
[INFO] [stdout]    --> src/application.rs:289:14
[INFO] [stdout]     |
[INFO] [stdout] 289 |             .before_exec(move || {
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:176:21
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut connection = connections.get_mut(handle).unwrap();
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:195:21
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 let mut connection = connections.remove(handle);
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:243:17
[INFO] [stdout]     |
[INFO] [stdout] 243 |             let mut logger: syslog::Result<
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/signal.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 25 | use libc;
[INFO] [stdout]    |     ---- the item `libc` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 33 |         use libc;
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/health.rs:149:38
[INFO] [stdout]     |
[INFO] [stdout] 149 |             let mut stats: statvfs = ::std::mem::uninitialized();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::os::unix::process::CommandExt::before_exec`: should be unsafe, use `pre_exec` instead
[INFO] [stdout]    --> src/application.rs:289:14
[INFO] [stdout]     |
[INFO] [stdout] 289 |             .before_exec(move || {
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:176:21
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut connection = connections.get_mut(handle).unwrap();
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:195:21
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 let mut connection = connections.remove(handle);
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stream.rs:243:17
[INFO] [stdout]     |
[INFO] [stdout] 243 |             let mut logger: syslog::Result<
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.38s
[INFO] running `Command { std: "docker" "inspect" "31cb7249cf173741024ef238452d7ada89097da7317cfa60966522fb03d77490", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31cb7249cf173741024ef238452d7ada89097da7317cfa60966522fb03d77490", kill_on_drop: false }`
[INFO] [stdout] 31cb7249cf173741024ef238452d7ada89097da7317cfa60966522fb03d77490
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 79854447ccfb8d3646cc0af36826c619d99065b18735a7b490c324f0952967bb
[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" "79854447ccfb8d3646cc0af36826c619d99065b18735a7b490c324f0952967bb", kill_on_drop: false }`
[INFO] [stderr] warning: the item `libc` is imported redundantly
[INFO] [stderr]   --> src/signal.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 25 | use libc;
[INFO] [stderr]    |     ---- the item `libc` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 33 |         use libc;
[INFO] [stderr]    |             ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `libc` is imported redundantly
[INFO] [stderr]   --> src/signal.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 25 | use libc;
[INFO] [stderr]    |     ---- the item `libc` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 33 |         use libc;
[INFO] [stderr]    |             ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/health.rs:149:38
[INFO] [stderr]     |
[INFO] [stderr] 149 |             let mut stats: statvfs = ::std::mem::uninitialized();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::os::unix::process::CommandExt::before_exec`: should be unsafe, use `pre_exec` instead
[INFO] [stderr]    --> src/application.rs:289:14
[INFO] [stderr]     |
[INFO] [stderr] 289 |             .before_exec(move || {
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/health.rs:149:38
[INFO] [stderr]     |
[INFO] [stderr] 149 |             let mut stats: statvfs = ::std::mem::uninitialized();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::os::unix::process::CommandExt::before_exec`: should be unsafe, use `pre_exec` instead
[INFO] [stderr]    --> src/application.rs:289:14
[INFO] [stderr]     |
[INFO] [stderr] 289 |             .before_exec(move || {
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stream.rs:176:21
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 let mut connection = connections.get_mut(handle).unwrap();
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stream.rs:195:21
[INFO] [stderr]     |
[INFO] [stderr] 195 |                 let mut connection = connections.remove(handle);
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stream.rs:176:21
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 let mut connection = connections.get_mut(handle).unwrap();
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stream.rs:243:17
[INFO] [stderr]     |
[INFO] [stderr] 243 |             let mut logger: syslog::Result<
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stream.rs:195:21
[INFO] [stderr]     |
[INFO] [stderr] 195 |                 let mut connection = connections.remove(handle);
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/stream.rs:243:17
[INFO] [stderr]     |
[INFO] [stderr] 243 |             let mut logger: syslog::Result<
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.22s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/riffol-36dd069d09d637e7
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr] thread '<unnamed>' panicked at 'attempted to leave type `internal::Local` uninitialized, which is invalid', /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/mem/mod.rs:658:9
[INFO] [stdout] test config::tests::test ... ok
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55e854230d50 - std::backtrace_rs::backtrace::libunwind::trace::h7cf3ca97bd83fbab
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]    1:     0x55e854230d50 - std::backtrace_rs::backtrace::trace_unsynchronized::h5a69c674b2d9ea5c
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55e854230d50 - std::sys_common::backtrace::_print_fmt::hdf72478dfcb50678
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]    3:     0x55e854230d50 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e0bdbb35e83deca
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]    4:     0x55e8542557ac - core::fmt::write::he67f9b17bcb7ee73
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]    5:     0x55e85422a252 - std::io::Write::write_fmt::hac97d5cb5753e2ec
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/mod.rs:1516
[INFO] [stderr]    6:     0x55e85423329d - std::sys_common::backtrace::_print::haa20918e28a126c5
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]    7:     0x55e85423329d - std::sys_common::backtrace::print::h49e772a4873d9076
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]    8:     0x55e85423329d - std::panicking::default_hook::{{closure}}::hb218b305d15e3f11
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:208
[INFO] [stderr]    9:     0x55e854232f48 - std::panicking::default_hook::h63997b7b949e1ce0
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:227
[INFO] [stderr]   10:     0x55e854233981 - std::panicking::rust_panic_with_hook::hb54f09ccadf64bd3
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:577
[INFO] [stderr]   11:     0x55e854233529 - std::panicking::begin_panic_handler::{{closure}}::h8b43445b254eeb30
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:484
[INFO] [stderr]   12:     0x55e8542311dc - std::sys_common::backtrace::__rust_end_short_backtrace::hacd691450edfeae0
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]   13:     0x55e8542334e9 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:483
[INFO] [stderr]   14:     0x55e854253dd1 - core::panicking::panic_fmt::h5b17d4a0e853d0f5
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/panicking.rs:85
[INFO] [stderr]   15:     0x55e854253d1d - core::panicking::panic::hc6be4d7009fb30ae
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/panicking.rs:50
[INFO] [stderr]   16:     0x55e854205289 - core::mem::uninitialized::hcd95d478af821c12
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/mem/mod.rs:658
[INFO] [stderr]   17:     0x55e854205289 - <crossbeam_epoch::internal::Local as crossbeam_epoch::sync::list::IsElement<crossbeam_epoch::internal::Local>>::entry_of::h2349e8f51f0eb528
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/internal.rs:485
[INFO] [stderr]   18:     0x55e85420c4e3 - crossbeam_epoch::sync::list::List<T,C>::insert::h6ea9bfbd342a1b81
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/sync/list.rs:176
[INFO] [stderr]   19:     0x55e854204364 - crossbeam_epoch::internal::Local::register::h25f54c38a2a554cb
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/internal.rs:291
[INFO] [stderr]   20:     0x55e8542097ae - crossbeam_epoch::collector::Collector::register::h812fcbda202130b9
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/collector.rs:39
[INFO] [stderr]   21:     0x55e8542098c4 - crossbeam_epoch::default::HANDLE::__init::h90e4fa6b4e3f2268
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/default.rs:17
[INFO] [stderr]   22:     0x55e8542091d9 - core::ops::function::FnOnce::call_once::hb6ae5a7751c8c9d3
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stderr]   23:     0x55e85420df4c - std::thread::local::lazy::LazyKeyInner<T>::initialize::h94e8da6037dc9e66
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/local.rs:304
[INFO] [stderr]   24:     0x55e85420aa7d - std::thread::local::fast::Key<T>::try_initialize::h7bceb303ec1a5ecd
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/local.rs:473
[INFO] [stderr]   25:     0x55e85420abc7 - std::thread::local::fast::Key<T>::get::hb7adb78bd86f82c4
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/local.rs:456
[INFO] [stderr]   26:     0x55e8542098fd - crossbeam_epoch::default::HANDLE::__getit::h5b6da4fef958c5b2
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/local.rs:183
[INFO] [stderr]   27:     0x55e853e99915 - std::thread::local::LocalKey<T>::try_with::he0773541db35bad7
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/local.rs:271
[INFO] [stderr]   28:     0x55e853ef79af - crossbeam_epoch::default::with_handle::h8c418a8daf7889ea
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/default.rs:42
[INFO] [stderr]   29:     0x55e853ef7ad9 - crossbeam_epoch::default::pin::h0d8ff80f2e5d334a
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.6.1/src/default.rs:23
[INFO] [stderr]   30:     0x55e853ee3264 - crossbeam_channel::flavors::list::Channel<T>::start_recv::h9335aa58d8eba301
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.2.6/src/flavors/list.rs:223
[INFO] [stderr]   31:     0x55e853ee3969 - crossbeam_channel::flavors::list::Channel<T>::recv_nonblocking::hb3d132703847c473
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.2.6/src/flavors/list.rs:393
[INFO] [stderr]   32:     0x55e853eee606 - crossbeam_channel::internal::channel::recv_nonblocking::hc895db3193c2666a
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.2.6/src/internal/channel.rs:915
[INFO] [stderr]   33:     0x55e853eee689 - crossbeam_channel::internal::channel::Receiver<T>::try_recv::h6e42f75679a2afb6
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.2.6/src/internal/channel.rs:561
[INFO] [stderr]   34:     0x55e853efc0ee - riffol::stream::handler::hc9abd4a3d0d42caa
[INFO] [stderr]                                at /opt/rustwide/workdir/src/stream.rs:151
[INFO] [stderr]   35:     0x55e853efbc9d - riffol::stream::Handler::new::{{closure}}::h7ac090fc7e5cd421
[INFO] [stderr]                                at /opt/rustwide/workdir/src/stream.rs:109
[INFO] [stderr]   36:     0x55e853eb0d1e - std::sys_common::backtrace::__rust_begin_short_backtrace::hdde4d3bca695b281
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]   37:     0x55e853ed1061 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::he352fee2abd106d2
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:464
[INFO] [stderr]   38:     0x55e853ee0bc1 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::he048dde4d3977d8e
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stderr]   39:     0x55e853e9232c - std::panicking::try::do_call::h0e5ee101b3844172
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stderr]   40:     0x55e853e9708d - __rust_try
[INFO] [stderr]   41:     0x55e853e92253 - std::panicking::try::h340a308a87f200a0
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stderr]   42:     0x55e853ee5e51 - std::panic::catch_unwind::h8880f271473a1a50
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stderr]   43:     0x55e853ed0e4d - std::thread::Builder::spawn_unchecked::{{closure}}::hd5cc00ecba881425
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:463
[INFO] [stderr]   44:     0x55e853eb29de - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc7c566fb85dbb7a5
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stderr]   45:     0x55e85423a51a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hd4d30e37db281e8f
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stderr]   46:     0x55e85423a51a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h019185a215ba16e4
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stderr]   47:     0x55e85423a51a - std::sys::unix::thread::Thread::new::thread_start::h33c6d7cf25f9291f
[INFO] [stderr]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys/unix/thread.rs:87
[INFO] [stderr]   48:     0x7f74c3a54609 - start_thread
[INFO] [stderr]   49:     0x7f74c3cea103 - clone
[INFO] [stderr]   50:                0x0 - <unknown>
[INFO] [stderr] thread panicked while panicking. aborting.
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/riffol-36dd069d09d637e7` (signal: 4, SIGILL: illegal instruction)
[INFO] running `Command { std: "docker" "inspect" "79854447ccfb8d3646cc0af36826c619d99065b18735a7b490c324f0952967bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79854447ccfb8d3646cc0af36826c619d99065b18735a7b490c324f0952967bb", kill_on_drop: false }`
[INFO] [stdout] 79854447ccfb8d3646cc0af36826c619d99065b18735a7b490c324f0952967bb
