[INFO] fetching crate stutter-rs 0.1.1...
[INFO] testing stutter-rs-0.1.1 against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] extracting crate stutter-rs 0.1.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate stutter-rs 0.1.1 on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stutter-rs 0.1.1
[INFO] finished tweaking crates.io crate stutter-rs 0.1.1
[INFO] tweaked toml for crates.io crate stutter-rs 0.1.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cactus v1.0.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fcee98960bfb7548b5c74f8d2faf84e6f28a61a81379f6c122601f128c595ce1
[INFO] running `Command { std: "docker" "start" "-a" "fcee98960bfb7548b5c74f8d2faf84e6f28a61a81379f6c122601f128c595ce1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcee98960bfb7548b5c74f8d2faf84e6f28a61a81379f6c122601f128c595ce1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcee98960bfb7548b5c74f8d2faf84e6f28a61a81379f6c122601f128c595ce1", kill_on_drop: false }`
[INFO] [stdout] fcee98960bfb7548b5c74f8d2faf84e6f28a61a81379f6c122601f128c595ce1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94efb3066b8cffa3b56fb7a92a08edbca7b03ad3f2095ad2f9267f733593b366
[INFO] running `Command { std: "docker" "start" "-a" "94efb3066b8cffa3b56fb7a92a08edbca7b03ad3f2095ad2f9267f733593b366", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling cactus v1.0.6
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling stutter-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             n: tag!("null") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             n: tag!("true") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             n: tag!("false") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ast/function.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:40
[INFO] [stdout]     |
[INFO] [stdout] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:54
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `next_id` should have an upper case name
[INFO] [stdout]   --> src/eval/types.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | static mut next_id: i32 = 0;
[INFO] [stdout]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             n: tag!("null") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             n: tag!("true") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             n: tag!("false") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ast/function.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:40
[INFO] [stdout]     |
[INFO] [stdout] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:54
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `next_id` should have an upper case name
[INFO] [stdout]   --> src/eval/types.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | static mut next_id: i32 = 0;
[INFO] [stdout]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "94efb3066b8cffa3b56fb7a92a08edbca7b03ad3f2095ad2f9267f733593b366", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94efb3066b8cffa3b56fb7a92a08edbca7b03ad3f2095ad2f9267f733593b366", kill_on_drop: false }`
[INFO] [stdout] 94efb3066b8cffa3b56fb7a92a08edbca7b03ad3f2095ad2f9267f733593b366
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38d44f228a9121e7f0bc4d1a0d40567f14a38f99b02b3fbbc5e26de5df9c591e
[INFO] running `Command { std: "docker" "start" "-a" "38d44f228a9121e7f0bc4d1a0d40567f14a38f99b02b3fbbc5e26de5df9c591e", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             n: tag!("null") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             n: tag!("true") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             n: tag!("false") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ast/function.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:40
[INFO] [stdout]     |
[INFO] [stdout] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:54
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling stutter-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: static variable `next_id` should have an upper case name
[INFO] [stdout]   --> src/eval/types.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | static mut next_id: i32 = 0;
[INFO] [stdout]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             n: tag!("null") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             n: tag!("true") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             n: tag!("false") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ast/function.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:40
[INFO] [stdout]     |
[INFO] [stdout] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             n: tag!("null") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             n: tag!("true") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/ast/parse.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             n: tag!("false") >>
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/ast/function.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:40
[INFO] [stdout]     |
[INFO] [stdout] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:54
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `next_id` should have an upper case name
[INFO] [stdout]   --> src/eval/types.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | static mut next_id: i32 = 0;
[INFO] [stdout]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:54
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `next_id` should have an upper case name
[INFO] [stdout]   --> src/eval/types.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | static mut next_id: i32 = 0;
[INFO] [stdout]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "38d44f228a9121e7f0bc4d1a0d40567f14a38f99b02b3fbbc5e26de5df9c591e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38d44f228a9121e7f0bc4d1a0d40567f14a38f99b02b3fbbc5e26de5df9c591e", kill_on_drop: false }`
[INFO] [stdout] 38d44f228a9121e7f0bc4d1a0d40567f14a38f99b02b3fbbc5e26de5df9c591e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 33edfd5d0fffa21638fe0c3da16b8b929aa8a0b4d0bda4f2bf7e7f8dfdb3202c
[INFO] running `Command { std: "docker" "start" "-a" "33edfd5d0fffa21638fe0c3da16b8b929aa8a0b4d0bda4f2bf7e7f8dfdb3202c", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stderr]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stderr]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             n: tag!("null") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             n: tag!("true") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             n: tag!("false") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ast/function.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stderr]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func`
[INFO] [stderr]    --> src/eval/types.rs:110:40
[INFO] [stderr]     |
[INFO] [stderr] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stderr]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:54
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stderr]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `next_id` should have an upper case name
[INFO] [stderr]   --> src/eval/types.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | static mut next_id: i32 = 0;
[INFO] [stderr]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stderr]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stderr]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             n: tag!("null") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             n: tag!("true") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             n: tag!("false") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ast/function.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stderr]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func`
[INFO] [stderr]    --> src/eval/types.rs:110:40
[INFO] [stderr]     |
[INFO] [stderr] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stderr]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:54
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stderr]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `next_id` should have an upper case name
[INFO] [stderr]   --> src/eval/types.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | static mut next_id: i32 = 0;
[INFO] [stderr]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/eval/builtins/static_functions.rs:6:21
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub type StaticFn = Fn(Vec<Value>) -> Value;
[INFO] [stderr]   |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Value>) -> Value`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/eval/builtins/language_functions.rs:7:23
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub type LanguageFn = Fn(Vec<Expression>, &mut CallStack) -> Value;
[INFO] [stderr]   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Expression>, &mut CallStack) -> Value`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             n: tag!("null") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             n: tag!("true") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/ast/parse.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             n: tag!("false") >>
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]   --> src/ast/function.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn eq(&self, other: &Function) -> bool {
[INFO] [stderr]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func`
[INFO] [stderr]    --> src/eval/types.rs:110:40
[INFO] [stderr]     |
[INFO] [stderr] 110 |             if let Value::Function(ref func) = frame.borrow().returns {
[INFO] [stderr]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:54
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, box_patterns, fn_traits, nll, iterator_step_by)]
[INFO] [stderr]   |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `next_id` should have an upper case name
[INFO] [stderr]   --> src/eval/types.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | static mut next_id: i32 = 0;
[INFO] [stderr]    |            ^^^^^^^ help: convert the identifier to upper case: `NEXT_ID`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stutter_rs-3dd362f80b729a55)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stutter_rs-775a2a5e44c4231e)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::if_1st ... ok
[INFO] [stdout] test tests::if_2nd ... ok
[INFO] [stdout] test tests::addition_pos ... ok
[INFO] [stdout] test tests::if_else ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stutter-rs
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "33edfd5d0fffa21638fe0c3da16b8b929aa8a0b4d0bda4f2bf7e7f8dfdb3202c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33edfd5d0fffa21638fe0c3da16b8b929aa8a0b4d0bda4f2bf7e7f8dfdb3202c", kill_on_drop: false }`
[INFO] [stdout] 33edfd5d0fffa21638fe0c3da16b8b929aa8a0b4d0bda4f2bf7e7f8dfdb3202c