[INFO] cloning repository https://github.com/yubachiri/play_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yubachiri/play_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyubachiri%2Fplay_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyubachiri%2Fplay_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e36112af70d302386e3c45660f70db4f1673493
[INFO] checking yubachiri/play_rust against master#82310651b93a594a3fd69015e1562186a080d94c for pr-145770
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyubachiri%2Fplay_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yubachiri/play_rust
[INFO] finished tweaking git repo https://github.com/yubachiri/play_rust
[INFO] tweaked toml for git repo https://github.com/yubachiri/play_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yubachiri/play_rust on toolchain 82310651b93a594a3fd69015e1562186a080d94c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yubachiri/play_rust 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" "+82310651b93a594a3fd69015e1562186a080d94c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded bitflags v0.5.0
[INFO] [stderr]   Downloaded getopts v0.2.21
[INFO] [stderr]   Downloaded pulldown-cmark v0.0.8
[INFO] [stderr]   Downloaded skeptic v0.9.0
[INFO] [stderr]   Downloaded ascii v0.9.3
[INFO] [stderr]   Downloaded combine v3.8.1
[INFO] [stderr]   Downloaded combine-language v3.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c6e4ac994e487611aa6d0b9948127cc0c4a350bd3587bcd5e4a131748ac1ffb
[INFO] running `Command { std: "docker" "start" "-a" "4c6e4ac994e487611aa6d0b9948127cc0c4a350bd3587bcd5e4a131748ac1ffb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c6e4ac994e487611aa6d0b9948127cc0c4a350bd3587bcd5e4a131748ac1ffb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c6e4ac994e487611aa6d0b9948127cc0c4a350bd3587bcd5e4a131748ac1ffb", kill_on_drop: false }`
[INFO] [stdout] 4c6e4ac994e487611aa6d0b9948127cc0c4a350bd3587bcd5e4a131748ac1ffb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af28250ba76cb998b4afe01b033db18426efb15de36aa9483493bf131b6cabab
[INFO] running `Command { std: "docker" "start" "-a" "af28250ba76cb998b4afe01b033db18426efb15de36aa9483493bf131b6cabab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling bitflags v0.5.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling pulldown-cmark v0.0.8
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling skeptic v0.9.0
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling combine-language v3.0.2
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ParseResult`, `chainl1`, and `parser`
[INFO] [stdout]  --> src/calculator_with_language_env.rs:5:40
[INFO] [stdout]   |
[INFO] [stdout] 5 | use combine::{Parser, satisfy, Stream, ParseResult, ParseError, parser, chainl1};
[INFO] [stdout]   |                                        ^^^^^^^^^^^              ^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/trait.rs:17:29
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn do_another_something(x: &Foo) {
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn do_another_something(x: &dyn Foo) {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/trait.rs:29:33
[INFO] [stdout]    |
[INFO] [stdout] 29 |     do_another_something(&z as &Foo);
[INFO] [stdout]    |                                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 |     do_another_something(&z as &dyn Foo);
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]  --> src/calculator_with_language_env.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Expr {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calc_env` is never used
[INFO] [stdout]   --> src/calculator_with_language_env.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn calc_env<'a, I: 'a>() -> LanguageEnv<'a, I> 
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/trait.rs:17:29
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn do_another_something(x: &Foo) {
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn do_another_something(x: &dyn Foo) {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/trait.rs:29:33
[INFO] [stdout]    |
[INFO] [stdout] 29 |     do_another_something(&z as &Foo);
[INFO] [stdout]    |                                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 |     do_another_something(&z as &dyn Foo);
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `i64: Extend<char>` is not satisfied
[INFO] [stdout]   --> src/calculator.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |         .map(Num)
[INFO] [stdout]    |          ^^^ the trait `Extend<char>` is not implemented for `i64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the following other types implement trait `Extend<A>`:
[INFO] [stdout]              `()` implements `Extend<()>`
[INFO] [stdout]              `(EA,)` implements `Extend<(A,)>`
[INFO] [stdout]              `(EB, EA)` implements `Extend<(B, A)>`
[INFO] [stdout]              `(EC, EB, EA)` implements `Extend<(C, B, A)>`
[INFO] [stdout]              `(ED, EC, EB, EA)` implements `Extend<(D, C, B, A)>`
[INFO] [stdout]              `(EE, ED, EC, EB, EA)` implements `Extend<(E, D, C, B, A)>`
[INFO] [stdout]              `(EF, EE, ED, EC, EB, EA)` implements `Extend<(F, E, D, C, B, A)>`
[INFO] [stdout]              `(EG, EF, EE, ED, EC, EB, EA)` implements `Extend<(G, F, E, D, C, B, A)>`
[INFO] [stdout]            and 45 others
[INFO] [stdout]    = note: required for `Many<i64, combine::char::Digit<_>>` to implement `Parser`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `skip` exists for struct `Map<Many<i64, Digit<_>>, fn(i64) -> Expr {Expr::Num}>`, but its trait bounds were not satisfied
[INFO] [stdout]    --> src/calculator.rs:41:10
[INFO] [stdout]     |
[INFO] [stdout] 39  |       let number = many(digit())
[INFO] [stdout]     |  __________________-
[INFO] [stdout] 40  | |         .map(Num)
[INFO] [stdout] 41  | |         .skip(spaces());
[INFO] [stdout]     | |         -^^^^ method cannot be called due to unsatisfied trait bounds
[INFO] [stdout]     | |_________|
[INFO] [stdout]     |
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/combine-3.8.1/src/parser/combinator.rs:249:1
[INFO] [stdout]     |
[INFO] [stdout] 249 |   pub struct Map<P, F>(P, F)
[INFO] [stdout]     |   -------------------- doesn't satisfy `_: Iterator` or `_: Parser`
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/combine-3.8.1/src/parser/repeat.rs:324:1
[INFO] [stdout]     |
[INFO] [stdout] 324 |   pub struct Many<F, P>(P, PhantomData<F>);
[INFO] [stdout]     |   --------------------- doesn't satisfy `<_ as Parser>::Input = _`, `<_ as Parser>::Output = _` or `Many<i64, combine::char::Digit<_>>: Parser`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `<Many<i64, combine::char::Digit<_>> as Parser>::Input = _`
[INFO] [stdout]             which is required by `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `<Many<i64, combine::char::Digit<_>> as Parser>::Output = _`
[INFO] [stdout]             which is required by `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `Many<i64, combine::char::Digit<_>>: Parser`
[INFO] [stdout]             which is required by `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             which is required by `&mut combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Iterator`
[INFO] [stdout]             which is required by `&mut combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `i64: Extend<char>` is not satisfied
[INFO] [stdout]   --> src/calculator.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |         .map(Num)
[INFO] [stdout]    |          ^^^ the trait `Extend<char>` is not implemented for `i64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the following other types implement trait `Extend<A>`:
[INFO] [stdout]              `()` implements `Extend<()>`
[INFO] [stdout]              `(EA,)` implements `Extend<(A,)>`
[INFO] [stdout]              `(EB, EA)` implements `Extend<(B, A)>`
[INFO] [stdout]              `(EC, EB, EA)` implements `Extend<(C, B, A)>`
[INFO] [stdout]              `(ED, EC, EB, EA)` implements `Extend<(D, C, B, A)>`
[INFO] [stdout]              `(EE, ED, EC, EB, EA)` implements `Extend<(E, D, C, B, A)>`
[INFO] [stdout]              `(EF, EE, ED, EC, EB, EA)` implements `Extend<(F, E, D, C, B, A)>`
[INFO] [stdout]              `(EG, EF, EE, ED, EC, EB, EA)` implements `Extend<(G, F, E, D, C, B, A)>`
[INFO] [stdout]            and 45 others
[INFO] [stdout]    = note: required for `Many<i64, combine::char::Digit<_>>` to implement `Parser`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `skip` exists for struct `Map<Many<i64, Digit<_>>, fn(i64) -> Expr {Expr::Num}>`, but its trait bounds were not satisfied
[INFO] [stdout]    --> src/calculator.rs:41:10
[INFO] [stdout]     |
[INFO] [stdout] 39  |       let number = many(digit())
[INFO] [stdout]     |  __________________-
[INFO] [stdout] 40  | |         .map(Num)
[INFO] [stdout] 41  | |         .skip(spaces());
[INFO] [stdout]     | |         -^^^^ method cannot be called due to unsatisfied trait bounds
[INFO] [stdout]     | |_________|
[INFO] [stdout]     |
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/combine-3.8.1/src/parser/combinator.rs:249:1
[INFO] [stdout]     |
[INFO] [stdout] 249 |   pub struct Map<P, F>(P, F)
[INFO] [stdout]     |   -------------------- doesn't satisfy `_: Iterator` or `_: Parser`
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/combine-3.8.1/src/parser/repeat.rs:324:1
[INFO] [stdout]     |
[INFO] [stdout] 324 |   pub struct Many<F, P>(P, PhantomData<F>);
[INFO] [stdout]     |   --------------------- doesn't satisfy `<_ as Parser>::Input = _`, `<_ as Parser>::Output = _` or `Many<i64, combine::char::Digit<_>>: Parser`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `<Many<i64, combine::char::Digit<_>> as Parser>::Input = _`
[INFO] [stdout]             which is required by `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `<Many<i64, combine::char::Digit<_>> as Parser>::Output = _`
[INFO] [stdout]             which is required by `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `Many<i64, combine::char::Digit<_>>: Parser`
[INFO] [stdout]             which is required by `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             which is required by `&mut combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Parser`
[INFO] [stdout]             `combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Iterator`
[INFO] [stdout]             which is required by `&mut combine::parser::combinator::Map<Many<i64, combine::char::Digit<_>>, fn(i64) -> Expr {Expr::Num}>: Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `playground` (bin "calculator" test) due to 2 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0277, E0599.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ParseResult`, `chainl1`, and `parser`
[INFO] [stdout]  --> src/calculator_with_language_env.rs:5:40
[INFO] [stdout]   |
[INFO] [stdout] 5 | use combine::{Parser, satisfy, Stream, ParseResult, ParseError, parser, chainl1};
[INFO] [stdout]   |                                        ^^^^^^^^^^^              ^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `calculator_with_language_env`
[INFO] [stdout]   --> src/calculator_with_language_env.rs:39:2
[INFO] [stdout]    |
[INFO] [stdout] 39 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `src/calculator_with_language_env.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `playground` (bin "calculator_with_language_env") due to 1 previous error; 1 warning emitted
[INFO] [stderr] error: could not compile `playground` (bin "calculator") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "af28250ba76cb998b4afe01b033db18426efb15de36aa9483493bf131b6cabab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af28250ba76cb998b4afe01b033db18426efb15de36aa9483493bf131b6cabab", kill_on_drop: false }`
[INFO] [stdout] af28250ba76cb998b4afe01b033db18426efb15de36aa9483493bf131b6cabab
