[INFO] fetching crate mpdsh 0.1.0...
[INFO] checking mpdsh-0.1.0 against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] extracting crate mpdsh 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate mpdsh 0.1.0
[INFO] finished tweaking crates.io crate mpdsh 0.1.0
[INFO] tweaked toml for crates.io crate mpdsh 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mpdsh 0.1.0 on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mpdsh 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84cb33c984217c3f0b9547b04822b411fb7fcdd92a6bb8e49b08bf132b449171
[INFO] running `Command { std: "docker" "start" "-a" "84cb33c984217c3f0b9547b04822b411fb7fcdd92a6bb8e49b08bf132b449171", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84cb33c984217c3f0b9547b04822b411fb7fcdd92a6bb8e49b08bf132b449171", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84cb33c984217c3f0b9547b04822b411fb7fcdd92a6bb8e49b08bf132b449171", kill_on_drop: false }`
[INFO] [stdout] 84cb33c984217c3f0b9547b04822b411fb7fcdd92a6bb8e49b08bf132b449171
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c259765ab2ce742280088b6cbc5469448cafa705c7e4ee3ae452fe58d9b764a
[INFO] running `Command { std: "docker" "start" "-a" "0c259765ab2ce742280088b6cbc5469448cafa705c7e4ee3ae452fe58d9b764a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking shell-words v1.0.0
[INFO] [stderr]     Checking wildmatch v1.0.10
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking dirs-sys-next v0.1.0
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking dirs-next v1.0.1
[INFO] [stderr]    Compiling rustyline-derive v0.3.1
[INFO] [stderr]     Checking rustyline v6.2.0
[INFO] [stderr]     Checking mpdsh v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `arg_prog`
[INFO] [stdout]     --> src/main.rs:1329:9
[INFO] [stdout]      |
[INFO] [stdout] 1329 |     let arg_prog = args[0].clone();
[INFO] [stdout]      |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arg_prog`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bin` is never read
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct ExecOk
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 | ,   bin:        Option<Vec<u8>>
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cmd_index` and `cur_cmd` are never read
[INFO] [stdout]   --> src/main.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct ExecErr
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 44 | ,   cmd_index:  i32
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 45 | ,   cur_cmd:    Option<String>
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `worker_handle` and `version` are never read
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Mpdsh
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 80 | {
[INFO] [stdout] 81 |     worker_handle:  thread::JoinHandle<()>
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 | ,   version:        String
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `hint_playlist` is never used
[INFO] [stdout]    --> src/main.rs:646:8
[INFO] [stdout]     |
[INFO] [stdout]  90 | impl Mpdsh
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 646 |     fn hint_playlist( &mut self ) -> Vec<String>
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PKG_AUTHORS` is never used
[INFO] [stdout]     --> src/main.rs:1323:7
[INFO] [stdout]      |
[INFO] [stdout] 1323 | const PKG_AUTHORS:  &'static str = env!("CARGO_PKG_AUTHORS");
[INFO] [stdout]      |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 | /                 wtx.send(
[INFO] [stdout] 177 | |                     Ok(
[INFO] [stdout] 178 | |                         ExecOk
[INFO] [stdout] ...   |
[INFO] [stdout] 184 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let _ = wtx.send(
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:310:17
[INFO] [stdout]     |
[INFO] [stdout] 310 |                 wtx.send( send );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 310 |                 let _ = wtx.send( send );
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:1277:16
[INFO] [stdout]      |
[INFO] [stdout] 1277 |     fn borrow( &self ) -> Ref< Mpdsh >
[INFO] [stdout]      |                ^^^^^      ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                |
[INFO] [stdout]      |                the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1277 |     fn borrow( &self ) -> Ref<'_,  Mpdsh >
[INFO] [stdout]      |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:1282:20
[INFO] [stdout]      |
[INFO] [stdout] 1282 |     fn borrow_mut( &self ) -> RefMut< Mpdsh >
[INFO] [stdout]      |                    ^^^^^      ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                    |
[INFO] [stdout]      |                    the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1282 |     fn borrow_mut( &self ) -> RefMut<'_,  Mpdsh >
[INFO] [stdout]      |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg_prog`
[INFO] [stdout]     --> src/main.rs:1329:9
[INFO] [stdout]      |
[INFO] [stdout] 1329 |     let arg_prog = args[0].clone();
[INFO] [stdout]      |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arg_prog`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bin` is never read
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct ExecOk
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 | ,   bin:        Option<Vec<u8>>
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cmd_index` and `cur_cmd` are never read
[INFO] [stdout]   --> src/main.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct ExecErr
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 44 | ,   cmd_index:  i32
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 45 | ,   cur_cmd:    Option<String>
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `worker_handle` and `version` are never read
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Mpdsh
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 80 | {
[INFO] [stdout] 81 |     worker_handle:  thread::JoinHandle<()>
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 | ,   version:        String
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `hint_playlist` is never used
[INFO] [stdout]    --> src/main.rs:646:8
[INFO] [stdout]     |
[INFO] [stdout]  90 | impl Mpdsh
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 646 |     fn hint_playlist( &mut self ) -> Vec<String>
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PKG_AUTHORS` is never used
[INFO] [stdout]     --> src/main.rs:1323:7
[INFO] [stdout]      |
[INFO] [stdout] 1323 | const PKG_AUTHORS:  &'static str = env!("CARGO_PKG_AUTHORS");
[INFO] [stdout]      |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 | /                 wtx.send(
[INFO] [stdout] 177 | |                     Ok(
[INFO] [stdout] 178 | |                         ExecOk
[INFO] [stdout] ...   |
[INFO] [stdout] 184 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let _ = wtx.send(
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:310:17
[INFO] [stdout]     |
[INFO] [stdout] 310 |                 wtx.send( send );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 310 |                 let _ = wtx.send( send );
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:1277:16
[INFO] [stdout]      |
[INFO] [stdout] 1277 |     fn borrow( &self ) -> Ref< Mpdsh >
[INFO] [stdout]      |                ^^^^^      ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                |
[INFO] [stdout]      |                the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1277 |     fn borrow( &self ) -> Ref<'_,  Mpdsh >
[INFO] [stdout]      |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:1282:20
[INFO] [stdout]      |
[INFO] [stdout] 1282 |     fn borrow_mut( &self ) -> RefMut< Mpdsh >
[INFO] [stdout]      |                    ^^^^^      ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                    |
[INFO] [stdout]      |                    the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1282 |     fn borrow_mut( &self ) -> RefMut<'_,  Mpdsh >
[INFO] [stdout]      |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.83s
[INFO] running `Command { std: "docker" "inspect" "0c259765ab2ce742280088b6cbc5469448cafa705c7e4ee3ae452fe58d9b764a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c259765ab2ce742280088b6cbc5469448cafa705c7e4ee3ae452fe58d9b764a", kill_on_drop: false }`
[INFO] [stdout] 0c259765ab2ce742280088b6cbc5469448cafa705c7e4ee3ae452fe58d9b764a
