[INFO] crate prefixopt 0.4.0 is already in cache
[INFO] testing prefixopt-0.4.0 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate prefixopt 0.4.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate prefixopt 0.4.0 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate prefixopt 0.4.0
[INFO] finished tweaking crates.io crate prefixopt 0.4.0
[INFO] tweaked toml for crates.io crate prefixopt 0.4.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stdout] 208ac613faf57ddf9ebaf2dc25075e0f03c8897220194ab344af687b829e2b4b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "208ac613faf57ddf9ebaf2dc25075e0f03c8897220194ab344af687b829e2b4b"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling scopeguard v0.2.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling map_in_place v0.1.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling prefixopt v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:56:42
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:80:42
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/core.rs:9:69
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Self::Container::concat_prefix(&ConcatRef::from(&prefix as &Display))
[INFO] [stderr]   |                                                                     ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/core.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self;
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:39:42
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:53:42
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.54s
[INFO] running `"docker" "inspect" "208ac613faf57ddf9ebaf2dc25075e0f03c8897220194ab344af687b829e2b4b"`
[INFO] running `"docker" "rm" "-f" "208ac613faf57ddf9ebaf2dc25075e0f03c8897220194ab344af687b829e2b4b"`
[INFO] [stdout] 208ac613faf57ddf9ebaf2dc25075e0f03c8897220194ab344af687b829e2b4b
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6e8cb5d2f93f10c81a947bcf39ebf9bc9e4d12c6667832a8502462635ff70b52
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "6e8cb5d2f93f10c81a947bcf39ebf9bc9e4d12c6667832a8502462635ff70b52"`
[INFO] [stderr]    Compiling prefixopt v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:56:42
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:80:42
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/core.rs:9:69
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Self::Container::concat_prefix(&ConcatRef::from(&prefix as &Display))
[INFO] [stderr]   |                                                                     ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/core.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self;
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:39:42
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:53:42
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:56:42
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:80:42
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/core.rs:9:69
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Self::Container::concat_prefix(&ConcatRef::from(&prefix as &Display))
[INFO] [stderr]   |                                                                     ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/core.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self;
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:39:42
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:53:42
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "6e8cb5d2f93f10c81a947bcf39ebf9bc9e4d12c6667832a8502462635ff70b52"`
[INFO] running `"docker" "rm" "-f" "6e8cb5d2f93f10c81a947bcf39ebf9bc9e4d12c6667832a8502462635ff70b52"`
[INFO] [stdout] 6e8cb5d2f93f10c81a947bcf39ebf9bc9e4d12c6667832a8502462635ff70b52
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b07d3ab2ca32ebf5bbffe078fd228aad786adefd7eaf52b163b6f8f9bac8c82f
[INFO] running `"docker" "start" "-a" "b07d3ab2ca32ebf5bbffe078fd228aad786adefd7eaf52b163b6f8f9bac8c82f"`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:56:42
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:80:42
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/core.rs:9:69
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Self::Container::concat_prefix(&ConcatRef::from(&prefix as &Display))
[INFO] [stderr]   |                                                                     ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/core.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self;
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:39:42
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:56:42
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:80:42
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parsable.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/core.rs:9:69
[INFO] [stderr]   |
[INFO] [stderr] 9 |         Self::Container::concat_prefix(&ConcatRef::from(&prefix as &Display))
[INFO] [stderr]   |                                                                     ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/core.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self;
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/std_impl.rs:39:42
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:53:42
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:53:42
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> bin/example_1.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn concat_prefix(prefix: &ConcatRef<&Display>) -> Self {
[INFO] [stderr]    |                                          ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/prefixopt-f9d48b5d3a8b01f6
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/example_1-bdcddf72ce2c3997
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/stdlib-5fd37299d3dff27e
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test_box_no_opt ... ok
[INFO] [stdout] test test_box ... ok
[INFO] [stdout] test test_option_some ... ok
[INFO] [stdout] test test_option_none ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests prefixopt
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b07d3ab2ca32ebf5bbffe078fd228aad786adefd7eaf52b163b6f8f9bac8c82f"`
[INFO] running `"docker" "rm" "-f" "b07d3ab2ca32ebf5bbffe078fd228aad786adefd7eaf52b163b6f8f9bac8c82f"`
[INFO] [stdout] b07d3ab2ca32ebf5bbffe078fd228aad786adefd7eaf52b163b6f8f9bac8c82f