[INFO] cloning repository https://github.com/reidswan/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/reidswan/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b926b2c59ce1f8b7be8bec6dfbf1aaaceb9ebab
[INFO] checking reidswan/rlox against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/reidswan/rlox on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/reidswan/rlox
[INFO] finished tweaking git repo https://github.com/reidswan/rlox
[INFO] tweaked toml for git repo https://github.com/reidswan/rlox written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/reidswan/rlox 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98ed4bf748fd0bc14cbf1091c1614e232531acef40e9dfc1eecd35f7d04b6325
[INFO] running `Command { std: "docker" "start" "-a" "98ed4bf748fd0bc14cbf1091c1614e232531acef40e9dfc1eecd35f7d04b6325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98ed4bf748fd0bc14cbf1091c1614e232531acef40e9dfc1eecd35f7d04b6325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98ed4bf748fd0bc14cbf1091c1614e232531acef40e9dfc1eecd35f7d04b6325", kill_on_drop: false }`
[INFO] [stdout] 98ed4bf748fd0bc14cbf1091c1614e232531acef40e9dfc1eecd35f7d04b6325
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a7e2c4e8b01d2b5d020b68e28ceba24cf23643c1cb7307e7a2e6eb61ea18569
[INFO] running `Command { std: "docker" "start" "-a" "3a7e2c4e8b01d2b5d020b68e28ceba24cf23643c1cb7307e7a2e6eb61ea18569", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking treelox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:89:9
[INFO] [stdout]     |
[INFO] [stdout] 89  | /         if let $token_type = token {
[INFO] [stdout] 90  | |             $self.advance();
[INFO] [stdout] 91  | |             Ok(line)
[INFO] [stdout] 92  | |         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 96  | |             ))
[INFO] [stdout] 97  | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] ...
[INFO] [stdout] 236 |           consume!(self, Token::Semicolon);
[INFO] [stdout]     |           -------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `consume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 89  ~         let _ = if let $token_type = token {
[INFO] [stdout] 90  |             $self.advance();
[INFO] [stdout]   ...
[INFO] [stdout] 96  |             ))
[INFO] [stdout] 97  ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:89:9
[INFO] [stdout]     |
[INFO] [stdout] 89  | /         if let $token_type = token {
[INFO] [stdout] 90  | |             $self.advance();
[INFO] [stdout] 91  | |             Ok(line)
[INFO] [stdout] 92  | |         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 96  | |             ))
[INFO] [stdout] 97  | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] ...
[INFO] [stdout] 249 |           consume!(self, Token::Semicolon);
[INFO] [stdout]     |           -------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `consume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 89  ~         let _ = if let $token_type = token {
[INFO] [stdout] 90  |             $self.advance();
[INFO] [stdout]   ...
[INFO] [stdout] 96  |             ))
[INFO] [stdout] 97  ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:89:9
[INFO] [stdout]     |
[INFO] [stdout] 89  | /         if let $token_type = token {
[INFO] [stdout] 90  | |             $self.advance();
[INFO] [stdout] 91  | |             Ok(line)
[INFO] [stdout] 92  | |         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 96  | |             ))
[INFO] [stdout] 97  | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] ...
[INFO] [stdout] 261 |           consume!(self, Token::RightParen);
[INFO] [stdout]     |           --------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `consume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 89  ~         let _ = if let $token_type = token {
[INFO] [stdout] 90  |             $self.advance();
[INFO] [stdout]   ...
[INFO] [stdout] 96  |             ))
[INFO] [stdout] 97  ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:89:9
[INFO] [stdout]     |
[INFO] [stdout] 89  | /         if let $token_type = token {
[INFO] [stdout] 90  | |             $self.advance();
[INFO] [stdout] 91  | |             Ok(line)
[INFO] [stdout] 92  | |         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 96  | |             ))
[INFO] [stdout] 97  | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] ...
[INFO] [stdout] 236 |           consume!(self, Token::Semicolon);
[INFO] [stdout]     |           -------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `consume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 89  ~         let _ = if let $token_type = token {
[INFO] [stdout] 90  |             $self.advance();
[INFO] [stdout]   ...
[INFO] [stdout] 96  |             ))
[INFO] [stdout] 97  ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:89:9
[INFO] [stdout]     |
[INFO] [stdout] 89  | /         if let $token_type = token {
[INFO] [stdout] 90  | |             $self.advance();
[INFO] [stdout] 91  | |             Ok(line)
[INFO] [stdout] 92  | |         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 96  | |             ))
[INFO] [stdout] 97  | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] ...
[INFO] [stdout] 249 |           consume!(self, Token::Semicolon);
[INFO] [stdout]     |           -------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `consume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 89  ~         let _ = if let $token_type = token {
[INFO] [stdout] 90  |             $self.advance();
[INFO] [stdout]   ...
[INFO] [stdout] 96  |             ))
[INFO] [stdout] 97  ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/parser.rs:89:9
[INFO] [stdout]     |
[INFO] [stdout] 89  | /         if let $token_type = token {
[INFO] [stdout] 90  | |             $self.advance();
[INFO] [stdout] 91  | |             Ok(line)
[INFO] [stdout] 92  | |         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 96  | |             ))
[INFO] [stdout] 97  | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] ...
[INFO] [stdout] 261 |           consume!(self, Token::RightParen);
[INFO] [stdout]     |           --------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `consume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 89  ~         let _ = if let $token_type = token {
[INFO] [stdout] 90  |             $self.advance();
[INFO] [stdout]   ...
[INFO] [stdout] 96  |             ))
[INFO] [stdout] 97  ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "3a7e2c4e8b01d2b5d020b68e28ceba24cf23643c1cb7307e7a2e6eb61ea18569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a7e2c4e8b01d2b5d020b68e28ceba24cf23643c1cb7307e7a2e6eb61ea18569", kill_on_drop: false }`
[INFO] [stdout] 3a7e2c4e8b01d2b5d020b68e28ceba24cf23643c1cb7307e7a2e6eb61ea18569
[INFO] checking reidswan/rlox against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/reidswan/rlox on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/reidswan/rlox
[INFO] finished tweaking git repo https://github.com/reidswan/rlox
[INFO] tweaked toml for git repo https://github.com/reidswan/rlox written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/reidswan/rlox 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cddf65e936a58730f70d5a814d788f55d25c86e7583add0a30b82116b8d9e79
[INFO] running `Command { std: "docker" "start" "-a" "0cddf65e936a58730f70d5a814d788f55d25c86e7583add0a30b82116b8d9e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cddf65e936a58730f70d5a814d788f55d25c86e7583add0a30b82116b8d9e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cddf65e936a58730f70d5a814d788f55d25c86e7583add0a30b82116b8d9e79", kill_on_drop: false }`
[INFO] [stdout] 0cddf65e936a58730f70d5a814d788f55d25c86e7583add0a30b82116b8d9e79
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71a838d22c2caad69923174129ca1a462f8e8d7d828d6b861d0034965a536fd0
[INFO] running `Command { std: "docker" "start" "-a" "71a838d22c2caad69923174129ca1a462f8e8d7d828d6b861d0034965a536fd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking treelox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/interpeter.rs:47:14
[INFO] [stdout]    |
[INFO] [stdout] 47 |             .collect::<Result<_, _>>()?;
[INFO] [stdout]    |              ^^^^^^^   ------------ type must be known at this point
[INFO] [stdout]    |              |
[INFO] [stdout]    |              cannot infer type of the type parameter `B` declared on the method `collect`
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: FromIterator<()>`
[INFO] [stdout]    = note: required for `Result<_, String>` to implement `FromIterator<Result<(), String>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/core/src/iter/traits/iterator.rs:1999:5
[INFO] [stdout] help: consider specifying the generic argument
[INFO] [stdout]    |
[INFO] [stdout] 47 |             .collect::<Vec<_>>()?;
[INFO] [stdout]    |                     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/interpeter.rs:47:14
[INFO] [stdout]    |
[INFO] [stdout] 47 |             .collect::<Result<_, _>>()?;
[INFO] [stdout]    |              ^^^^^^^   ------------ type must be known at this point
[INFO] [stdout]    |              |
[INFO] [stdout]    |              cannot infer type of the type parameter `B` declared on the method `collect`
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: FromIterator<()>`
[INFO] [stdout]    = note: required for `Result<_, String>` to implement `FromIterator<Result<(), String>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/core/src/iter/traits/iterator.rs:1999:5
[INFO] [stdout] help: consider specifying the generic argument
[INFO] [stdout]    |
[INFO] [stdout] 47 |             .collect::<Vec<_>>()?;
[INFO] [stdout]    |                     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `treelox` (bin "treelox" test) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `treelox` (bin "treelox") due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "71a838d22c2caad69923174129ca1a462f8e8d7d828d6b861d0034965a536fd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71a838d22c2caad69923174129ca1a462f8e8d7d828d6b861d0034965a536fd0", kill_on_drop: false }`
[INFO] [stdout] 71a838d22c2caad69923174129ca1a462f8e8d7d828d6b861d0034965a536fd0