[INFO] fetching crate pxl 0.0.9...
[INFO] testing pxl-0.0.9 against 1.54.0 for beta-1.55-1
[INFO] extracting crate pxl 0.0.9 into /workspace/builds/worker-29/source
[INFO] validating manifest of crates.io crate pxl 0.0.9 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pxl 0.0.9
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate pxl 0.0.9
[INFO] tweaked toml for crates.io crate pxl 0.0.9 written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
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[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2de0b76ca7c6f85bc32a637fca861239dac892d03cbd3ee2fa1fef18dab56f6b
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[INFO] running `Command { std: "docker" "rm" "-f" "2de0b76ca7c6f85bc32a637fca861239dac892d03cbd3ee2fa1fef18dab56f6b", kill_on_drop: false }`
[INFO] [stdout] 2de0b76ca7c6f85bc32a637fca861239dac892d03cbd3ee2fa1fef18dab56f6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81c03de2d007437c83b6187e262bf9aaeba3848dc35e67cd4ef6c2f76357db5c
[INFO] running `Command { std: "docker" "start" "-a" "81c03de2d007437c83b6187e262bf9aaeba3848dc35e67cd4ef6c2f76357db5c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling downcast-rs v1.2.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling libloading v0.6.7
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling dlib v0.4.2
[INFO] [stderr]    Compiling wayland-sys v0.20.12
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling wayland-commons v0.20.12
[INFO] [stderr]    Compiling wayland-scanner v0.20.12
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling cpal v0.8.2
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling wayland-client v0.20.12
[INFO] [stderr]    Compiling wayland-protocols v0.20.12
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling glutin v0.16.0
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]    Compiling smithay-client-toolkit v0.2.6
[INFO] [stderr]    Compiling winit v0.15.1
[INFO] [stderr]    Compiling pxl v0.0.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/speaker.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |   synthesizer: Arc<Mutex<Synthesizer>>,
[INFO] [stdout]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/speaker.rs:20:37
[INFO] [stdout]    |
[INFO] [stdout] 20 |   pub fn new(synthesizer: Arc<Mutex<Synthesizer>>) -> Result<Speaker, Error> {
[INFO] [stdout]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/mod.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |   program: Box<Program>,
[INFO] [stdout]    |                ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/mod.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |   pub fn new(program: Box<Program>) -> Result<Runtime, Error> {
[INFO] [stdout]    |                           ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:233:45
[INFO] [stdout]     |
[INFO] [stdout] 233 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/runtime/display.rs:93:84
[INFO] [stdout]    |
[INFO] [stdout] 93 |         gl::BindFragDataLocation(shader_program, 0, CString::new("color").unwrap().as_ptr());
[INFO] [stdout]    |                                                     ------------------------------ ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                                                     |
[INFO] [stdout]    |                                                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/runtime/display.rs:96:82
[INFO] [stdout]    |
[INFO] [stdout] 96 |           gl::GetUniformLocation(shader_program, CString::new("pixels").unwrap().as_ptr());
[INFO] [stdout]    |                                                  ------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]    --> src/runtime/display.rs:100:83
[INFO] [stdout]     |
[INFO] [stdout] 100 |           gl::GetAttribLocation(shader_program, CString::new("position").unwrap().as_ptr());
[INFO] [stdout]     |                                                 --------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]     |
[INFO] [stdout]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/runtime/mod.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 |       mem::replace(&mut self.events, events);
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.37s
[INFO] running `Command { std: "docker" "inspect" "81c03de2d007437c83b6187e262bf9aaeba3848dc35e67cd4ef6c2f76357db5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81c03de2d007437c83b6187e262bf9aaeba3848dc35e67cd4ef6c2f76357db5c", kill_on_drop: false }`
[INFO] [stdout] 81c03de2d007437c83b6187e262bf9aaeba3848dc35e67cd4ef6c2f76357db5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8193b68c44e0fa581669dbe4591998687f059e94518b4e4eefdf6069bae9dfab
[INFO] running `Command { std: "docker" "start" "-a" "8193b68c44e0fa581669dbe4591998687f059e94518b4e4eefdf6069bae9dfab", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/speaker.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |   synthesizer: Arc<Mutex<Synthesizer>>,
[INFO] [stdout]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/speaker.rs:20:37
[INFO] [stdout]    |
[INFO] [stdout] 20 |   pub fn new(synthesizer: Arc<Mutex<Synthesizer>>) -> Result<Speaker, Error> {
[INFO] [stdout]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/mod.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |   program: Box<Program>,
[INFO] [stdout]    |                ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/mod.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |   pub fn new(program: Box<Program>) -> Result<Runtime, Error> {
[INFO] [stdout]    |                           ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:233:45
[INFO] [stdout]     |
[INFO] [stdout] 233 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/runtime/display.rs:93:84
[INFO] [stdout]    |
[INFO] [stdout] 93 |         gl::BindFragDataLocation(shader_program, 0, CString::new("color").unwrap().as_ptr());
[INFO] [stdout]    |                                                     ------------------------------ ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                                                     |
[INFO] [stdout]    |                                                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/runtime/display.rs:96:82
[INFO] [stdout]    |
[INFO] [stdout] 96 |           gl::GetUniformLocation(shader_program, CString::new("pixels").unwrap().as_ptr());
[INFO] [stdout]    |                                                  ------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]    --> src/runtime/display.rs:100:83
[INFO] [stdout]     |
[INFO] [stdout] 100 |           gl::GetAttribLocation(shader_program, CString::new("position").unwrap().as_ptr());
[INFO] [stdout]     |                                                 --------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]     |
[INFO] [stdout]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/runtime/mod.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 |       mem::replace(&mut self.events, events);
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling pxl v0.0.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> examples/life.rs:177:45
[INFO] [stdout]     |
[INFO] [stdout] 177 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/speaker.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |   synthesizer: Arc<Mutex<Synthesizer>>,
[INFO] [stdout]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/speaker.rs:20:37
[INFO] [stdout]    |
[INFO] [stdout] 20 |   pub fn new(synthesizer: Arc<Mutex<Synthesizer>>) -> Result<Speaker, Error> {
[INFO] [stdout]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/mod.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |   program: Box<Program>,
[INFO] [stdout]    |                ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runtime/mod.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |   pub fn new(program: Box<Program>) -> Result<Runtime, Error> {
[INFO] [stdout]    |                           ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:233:45
[INFO] [stdout]     |
[INFO] [stdout] 233 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/runtime/display.rs:93:84
[INFO] [stdout]    |
[INFO] [stdout] 93 |         gl::BindFragDataLocation(shader_program, 0, CString::new("color").unwrap().as_ptr());
[INFO] [stdout]    |                                                     ------------------------------ ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                                                     |
[INFO] [stdout]    |                                                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/runtime/display.rs:96:82
[INFO] [stdout]    |
[INFO] [stdout] 96 |           gl::GetUniformLocation(shader_program, CString::new("pixels").unwrap().as_ptr());
[INFO] [stdout]    |                                                  ------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]    --> src/runtime/display.rs:100:83
[INFO] [stdout]     |
[INFO] [stdout] 100 |           gl::GetAttribLocation(shader_program, CString::new("position").unwrap().as_ptr());
[INFO] [stdout]     |                                                 --------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]     |
[INFO] [stdout]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/runtime/mod.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 |       mem::replace(&mut self.events, events);
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.09s
[INFO] running `Command { std: "docker" "inspect" "8193b68c44e0fa581669dbe4591998687f059e94518b4e4eefdf6069bae9dfab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8193b68c44e0fa581669dbe4591998687f059e94518b4e4eefdf6069bae9dfab", kill_on_drop: false }`
[INFO] [stdout] 8193b68c44e0fa581669dbe4591998687f059e94518b4e4eefdf6069bae9dfab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3510da4d864ce1ae8eca9bacc2f0e22a0ff5729b11b5ba5a8b47c184b936666b
[INFO] running `Command { std: "docker" "start" "-a" "3510da4d864ce1ae8eca9bacc2f0e22a0ff5729b11b5ba5a8b47c184b936666b", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/speaker.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |   synthesizer: Arc<Mutex<Synthesizer>>,
[INFO] [stderr]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/speaker.rs:20:37
[INFO] [stderr]    |
[INFO] [stderr] 20 |   pub fn new(synthesizer: Arc<Mutex<Synthesizer>>) -> Result<Speaker, Error> {
[INFO] [stderr]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/mod.rs:30:16
[INFO] [stderr]    |
[INFO] [stderr] 30 |   program: Box<Program>,
[INFO] [stderr]    |                ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/mod.rs:38:27
[INFO] [stderr]    |
[INFO] [stderr] 38 |   pub fn new(program: Box<Program>) -> Result<Runtime, Error> {
[INFO] [stderr]    |                           ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:233:45
[INFO] [stderr]     |
[INFO] [stderr] 233 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]   --> src/runtime/display.rs:93:84
[INFO] [stderr]    |
[INFO] [stderr] 93 |         gl::BindFragDataLocation(shader_program, 0, CString::new("color").unwrap().as_ptr());
[INFO] [stderr]    |                                                     ------------------------------ ^^^^^^ this pointer will be invalid
[INFO] [stderr]    |                                                     |
[INFO] [stderr]    |                                                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stderr]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]   --> src/runtime/display.rs:96:82
[INFO] [stderr]    |
[INFO] [stderr] 96 |           gl::GetUniformLocation(shader_program, CString::new("pixels").unwrap().as_ptr());
[INFO] [stderr]    |                                                  ------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]    |                                                  |
[INFO] [stderr]    |                                                  this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]    |
[INFO] [stderr]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]    --> src/runtime/display.rs:100:83
[INFO] [stderr]     |
[INFO] [stderr] 100 |           gl::GetAttribLocation(shader_program, CString::new("position").unwrap().as_ptr());
[INFO] [stderr]     |                                                 --------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]     |                                                 |
[INFO] [stderr]     |                                                 this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]     |
[INFO] [stderr]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/runtime/mod.rs:119:7
[INFO] [stderr]     |
[INFO] [stderr] 119 |       mem::replace(&mut self.events, events);
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/speaker.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |   synthesizer: Arc<Mutex<Synthesizer>>,
[INFO] [stderr]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/speaker.rs:20:37
[INFO] [stderr]    |
[INFO] [stderr] 20 |   pub fn new(synthesizer: Arc<Mutex<Synthesizer>>) -> Result<Speaker, Error> {
[INFO] [stderr]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/mod.rs:30:16
[INFO] [stderr]    |
[INFO] [stderr] 30 |   program: Box<Program>,
[INFO] [stderr]    |                ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runtime/mod.rs:38:27
[INFO] [stderr]    |
[INFO] [stderr] 38 |   pub fn new(program: Box<Program>) -> Result<Runtime, Error> {
[INFO] [stderr]    |                           ^^^^^^^ help: use `dyn`: `dyn Program`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:233:45
[INFO] [stderr]     |
[INFO] [stderr] 233 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]   --> src/runtime/display.rs:93:84
[INFO] [stderr]    |
[INFO] [stderr] 93 |         gl::BindFragDataLocation(shader_program, 0, CString::new("color").unwrap().as_ptr());
[INFO] [stderr]    |                                                     ------------------------------ ^^^^^^ this pointer will be invalid
[INFO] [stderr]    |                                                     |
[INFO] [stderr]    |                                                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stderr]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]   --> src/runtime/display.rs:96:82
[INFO] [stderr]    |
[INFO] [stderr] 96 |           gl::GetUniformLocation(shader_program, CString::new("pixels").unwrap().as_ptr());
[INFO] [stderr]    |                                                  ------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]    |                                                  |
[INFO] [stderr]    |                                                  this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]    |
[INFO] [stderr]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]    --> src/runtime/display.rs:100:83
[INFO] [stderr]     |
[INFO] [stderr] 100 |           gl::GetAttribLocation(shader_program, CString::new("position").unwrap().as_ptr());
[INFO] [stderr]     |                                                 --------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]     |                                                 |
[INFO] [stderr]     |                                                 this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]     |
[INFO] [stderr]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/runtime/mod.rs:119:7
[INFO] [stderr]     |
[INFO] [stderr] 119 |       mem::replace(&mut self.events, events);
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> examples/life.rs:177:45
[INFO] [stderr]     |
[INFO] [stderr] 177 |   fn synthesizer(&self) -> Option<Arc<Mutex<Synthesizer>>> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^ help: use `dyn`: `dyn Synthesizer`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/pxl-5c2b61646364d764)
[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 pxl
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - run (line 245) - compile ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.18s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3510da4d864ce1ae8eca9bacc2f0e22a0ff5729b11b5ba5a8b47c184b936666b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3510da4d864ce1ae8eca9bacc2f0e22a0ff5729b11b5ba5a8b47c184b936666b", kill_on_drop: false }`
[INFO] [stdout] 3510da4d864ce1ae8eca9bacc2f0e22a0ff5729b11b5ba5a8b47c184b936666b
