[INFO] cloning repository https://github.com/KeyboardFire/babble
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KeyboardFire/babble" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeyboardFire%2Fbabble", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeyboardFire%2Fbabble'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81f62d344385882d202b0440a34e4dfbffecbb42
[INFO] checking KeyboardFire/babble against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeyboardFire%2Fbabble" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KeyboardFire/babble on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KeyboardFire/babble
[INFO] finished tweaking git repo https://github.com/KeyboardFire/babble
[INFO] tweaked toml for git repo https://github.com/KeyboardFire/babble written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/KeyboardFire/babble already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 277293326aaf47eb4d9d6df83b6f166ff81c79ababfa0f86a3a1a5a462275d5c
[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" "277293326aaf47eb4d9d6df83b6f166ff81c79ababfa0f86a3a1a5a462275d5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "277293326aaf47eb4d9d6df83b6f166ff81c79ababfa0f86a3a1a5a462275d5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "277293326aaf47eb4d9d6df83b6f166ff81c79ababfa0f86a3a1a5a462275d5c", kill_on_drop: false }`
[INFO] [stdout] 277293326aaf47eb4d9d6df83b6f166ff81c79ababfa0f86a3a1a5a462275d5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76b4a39e1cda2175020cf394e4d098e19cafbf66b2a2de531bf4642c674e8321
[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" "76b4a39e1cda2175020cf394e4d098e19cafbf66b2a2de531bf4642c674e8321", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking babble v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:43:18
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Block(Vec<Rc<Fn(&mut Babble, &mut Write, &mut Read)>>)
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:43:39
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Block(Vec<Rc<Fn(&mut Babble, &mut Write, &mut Read)>>)
[INFO] [stdout]    |                                       ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:43:51
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Block(Vec<Rc<Fn(&mut Babble, &mut Write, &mut Read)>>)
[INFO] [stdout]    |                                                   ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:92:37
[INFO] [stdout]    |
[INFO] [stdout] 92 |                        stdout: &mut Write, stdin: &mut Read) {
[INFO] [stdout]    |                                     ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:92:56
[INFO] [stdout]    |
[INFO] [stdout] 92 |                        stdout: &mut Write, stdin: &mut Read) {
[INFO] [stdout]    |                                                        ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:41
[INFO] [stdout]     |
[INFO] [stdout] 100 |       fn tokenize(code: String) -> Vec<Rc<Fn(&mut Babble, &mut Write,
[INFO] [stdout]     |  _________________________________________^
[INFO] [stdout] 101 | |                                            &mut Read)>> {
[INFO] [stdout]     | |_____________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn tokenize(code: String) -> Vec<Rc<dyn Fn(&mut Babble, &mut Write,
[INFO] [stdout] 101 |                                            &mut Read)>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:62
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn tokenize(code: String) -> Vec<Rc<Fn(&mut Babble, &mut Write,
[INFO] [stdout]     |                                                              ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:101:49
[INFO] [stdout]     |
[INFO] [stdout] 101 | ...                   &mut Read)>> {
[INFO] [stdout]     |                            ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:26
[INFO] [stdout]     |
[INFO] [stdout] 114 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:47
[INFO] [stdout]     |
[INFO] [stdout] 114 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:59
[INFO] [stdout]     |
[INFO] [stdout] 114 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:337:26
[INFO] [stdout]     |
[INFO] [stdout] 337 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:337:47
[INFO] [stdout]     |
[INFO] [stdout] 337 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:337:59
[INFO] [stdout]     |
[INFO] [stdout] 337 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:378:26
[INFO] [stdout]     |
[INFO] [stdout] 378 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:378:47
[INFO] [stdout]     |
[INFO] [stdout] 378 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:378:59
[INFO] [stdout]     |
[INFO] [stdout] 378 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:396:26
[INFO] [stdout]     |
[INFO] [stdout] 396 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:396:47
[INFO] [stdout]     |
[INFO] [stdout] 396 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:396:59
[INFO] [stdout]     |
[INFO] [stdout] 396 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:43:18
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Block(Vec<Rc<Fn(&mut Babble, &mut Write, &mut Read)>>)
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:43:39
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Block(Vec<Rc<Fn(&mut Babble, &mut Write, &mut Read)>>)
[INFO] [stdout]    |                                       ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:43:51
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Block(Vec<Rc<Fn(&mut Babble, &mut Write, &mut Read)>>)
[INFO] [stdout]    |                                                   ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:92:37
[INFO] [stdout]    |
[INFO] [stdout] 92 |                        stdout: &mut Write, stdin: &mut Read) {
[INFO] [stdout]    |                                     ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:92:56
[INFO] [stdout]    |
[INFO] [stdout] 92 |                        stdout: &mut Write, stdin: &mut Read) {
[INFO] [stdout]    |                                                        ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:41
[INFO] [stdout]     |
[INFO] [stdout] 100 |       fn tokenize(code: String) -> Vec<Rc<Fn(&mut Babble, &mut Write,
[INFO] [stdout]     |  _________________________________________^
[INFO] [stdout] 101 | |                                            &mut Read)>> {
[INFO] [stdout]     | |_____________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn tokenize(code: String) -> Vec<Rc<dyn Fn(&mut Babble, &mut Write,
[INFO] [stdout] 101 |                                            &mut Read)>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:62
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn tokenize(code: String) -> Vec<Rc<Fn(&mut Babble, &mut Write,
[INFO] [stdout]     |                                                              ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:101:49
[INFO] [stdout]     |
[INFO] [stdout] 101 | ...                   &mut Read)>> {
[INFO] [stdout]     |                            ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:26
[INFO] [stdout]     |
[INFO] [stdout] 114 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:47
[INFO] [stdout]     |
[INFO] [stdout] 114 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:59
[INFO] [stdout]     |
[INFO] [stdout] 114 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:337:26
[INFO] [stdout]     |
[INFO] [stdout] 337 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:337:47
[INFO] [stdout]     |
[INFO] [stdout] 337 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:337:59
[INFO] [stdout]     |
[INFO] [stdout] 337 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:378:26
[INFO] [stdout]     |
[INFO] [stdout] 378 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:378:47
[INFO] [stdout]     |
[INFO] [stdout] 378 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:378:59
[INFO] [stdout]     |
[INFO] [stdout] 378 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:396:26
[INFO] [stdout]     |
[INFO] [stdout] 396 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Babble, &mut Write, &mut Read)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:396:47
[INFO] [stdout]     |
[INFO] [stdout] 396 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:396:59
[INFO] [stdout]     |
[INFO] [stdout] 396 |             -> Option<Rc<Fn(&mut Babble, &mut Write, &mut Read)>> {
[INFO] [stdout]     |                                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 20 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 `babble`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error; 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "76b4a39e1cda2175020cf394e4d098e19cafbf66b2a2de531bf4642c674e8321", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76b4a39e1cda2175020cf394e4d098e19cafbf66b2a2de531bf4642c674e8321", kill_on_drop: false }`
[INFO] [stdout] 76b4a39e1cda2175020cf394e4d098e19cafbf66b2a2de531bf4642c674e8321