[INFO] fetching crate stutter-rs 0.1.1...
[INFO] testing stutter-rs-0.1.1 against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] extracting crate stutter-rs 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate stutter-rs 0.1.1 on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", 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-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c32d4db682c53343f1ca8704563a1df3ff89e9473c94e7c62bc07a4c637fddd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5c32d4db682c53343f1ca8704563a1df3ff89e9473c94e7c62bc07a4c637fddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c32d4db682c53343f1ca8704563a1df3ff89e9473c94e7c62bc07a4c637fddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c32d4db682c53343f1ca8704563a1df3ff89e9473c94e7c62bc07a4c637fddd", kill_on_drop: false }`
[INFO] [stdout] 5c32d4db682c53343f1ca8704563a1df3ff89e9473c94e7c62bc07a4c637fddd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3033abf68951e932420ae21dde67633c89140aec0df2d1131c5bd7316b66d9fd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3033abf68951e932420ae21dde67633c89140aec0df2d1131c5bd7316b66d9fd", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cactus v1.0.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling nom v4.2.3
[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] 
[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] 
[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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:36
[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: 6 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] 
[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] 
[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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:36
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.84s
[INFO] running `Command { std: "docker" "inspect" "3033abf68951e932420ae21dde67633c89140aec0df2d1131c5bd7316b66d9fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3033abf68951e932420ae21dde67633c89140aec0df2d1131c5bd7316b66d9fd", kill_on_drop: false }`
[INFO] [stdout] 3033abf68951e932420ae21dde67633c89140aec0df2d1131c5bd7316b66d9fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 526562878d1b958a102610b0024fc6e211dc6118d0054c2e1339fa9af1e231a2
[INFO] running `Command { std: "docker" "start" "-a" "526562878d1b958a102610b0024fc6e211dc6118d0054c2e1339fa9af1e231a2", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[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] 
[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] 
[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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:36
[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: 6 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] 
[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] 
[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] 
[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] 
[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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:36
[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: `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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]    --> src/eval/types.rs:110:36
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "526562878d1b958a102610b0024fc6e211dc6118d0054c2e1339fa9af1e231a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "526562878d1b958a102610b0024fc6e211dc6118d0054c2e1339fa9af1e231a2", kill_on_drop: false }`
[INFO] [stdout] 526562878d1b958a102610b0024fc6e211dc6118d0054c2e1339fa9af1e231a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7a2187ea40b9f3123f1ce42bea58fabafd64b635250963d3e2937ea5d169f150
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7a2187ea40b9f3123f1ce42bea58fabafd64b635250963d3e2937ea5d169f150", 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] 
[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: 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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func`
[INFO] [stderr]    --> src/eval/types.rs:110:36
[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: 6 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] 
[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: 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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func`
[INFO] [stderr]    --> src/eval/types.rs:110:36
[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: 6 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] 
[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: 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]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func`
[INFO] [stderr]    --> src/eval/types.rs:110:36
[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: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/stutter_rs-f6f3061a26fe315e
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/stutter_rs-d4ac53bccfdbe2bd
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::if_else ... ok
[INFO] [stdout] test tests::addition_pos ... ok
[INFO] [stdout] test tests::if_2nd ... ok
[INFO] [stderr]    Doc-tests stutter-rs
[INFO] [stdout] test tests::if_1st ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7a2187ea40b9f3123f1ce42bea58fabafd64b635250963d3e2937ea5d169f150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a2187ea40b9f3123f1ce42bea58fabafd64b635250963d3e2937ea5d169f150", kill_on_drop: false }`
[INFO] [stdout] 7a2187ea40b9f3123f1ce42bea58fabafd64b635250963d3e2937ea5d169f150