[INFO] updating cached repository Systemcluster/bracket2-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Systemcluster/bracket2-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Systemcluster/bracket2-rs" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Systemcluster/bracket2-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Systemcluster/bracket2-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Systemcluster/bracket2-rs" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Systemcluster/bracket2-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Systemcluster/bracket2-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 52538166672b9b31fda33a3ad0abd3fc1cac9a62
[INFO] sha for GitHub repo Systemcluster/bracket2-rs: 52538166672b9b31fda33a3ad0abd3fc1cac9a62
[INFO] validating manifest of Systemcluster/bracket2-rs on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Systemcluster/bracket2-rs on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Systemcluster/bracket2-rs
[INFO] finished frobbing Systemcluster/bracket2-rs
[INFO] frobbed toml for Systemcluster/bracket2-rs written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Systemcluster/bracket2-rs/Cargo.toml
[INFO] started frobbing Systemcluster/bracket2-rs
[INFO] finished frobbing Systemcluster/bracket2-rs
[INFO] frobbed toml for Systemcluster/bracket2-rs written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Systemcluster/bracket2-rs/Cargo.toml
[INFO] crate Systemcluster/bracket2-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Systemcluster/bracket2-rs against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Systemcluster/bracket2-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4ae7103c6df17be45bb18d1111c04302946e7f7ab7d7166beead6089ad53d3ad
[INFO] running `"docker" "start" "-a" "4ae7103c6df17be45bb18d1111c04302946e7f7ab7d7166beead6089ad53d3ad"`
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking regex v0.2.5
[INFO] [stderr]     Checking simplelog v0.4.4
[INFO] [stderr]     Checking bracket2 v0.0.1-dev (/opt/crater/workdir)
[INFO] [stderr] warning: the feature `const_generics` is incomplete and may cause the compiler to crash
[INFO] [stderr]   --> src/main.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(const_generics)] // const generics
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/program.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |           lazy_static!{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 141 | |             static ref SUBLINK: Regex = Regex::new(r"^&([0-9]*)$").unwrap();
[INFO] [stderr] 142 | |             static ref INTEGER: Regex = Regex::new(r"^([0-9]+)$").unwrap();
[INFO] [stderr] 143 | |             static ref FLOATP: Regex = Regex::new(r"^([0-9]+\.[0-9]+)$").unwrap();
[INFO] [stderr] 144 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/program.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |           lazy_static!{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 141 | |             static ref SUBLINK: Regex = Regex::new(r"^&([0-9]*)$").unwrap();
[INFO] [stderr] 142 | |             static ref INTEGER: Regex = Regex::new(r"^([0-9]+)$").unwrap();
[INFO] [stderr] 143 | |             static ref FLOATP: Regex = Regex::new(r"^([0-9]+\.[0-9]+)$").unwrap();
[INFO] [stderr] 144 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/program.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |           lazy_static!{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 141 | |             static ref SUBLINK: Regex = Regex::new(r"^&([0-9]*)$").unwrap();
[INFO] [stderr] 142 | |             static ref INTEGER: Regex = Regex::new(r"^([0-9]+)$").unwrap();
[INFO] [stderr] 143 | |             static ref FLOATP: Regex = Regex::new(r"^([0-9]+\.[0-9]+)$").unwrap();
[INFO] [stderr] 144 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `const_generics` is incomplete and may cause the compiler to crash
[INFO] [stderr]   --> src/main.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(const_generics)] // const generics
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/program.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |           lazy_static!{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 141 | |             static ref SUBLINK: Regex = Regex::new(r"^&([0-9]*)$").unwrap();
[INFO] [stderr] 142 | |             static ref INTEGER: Regex = Regex::new(r"^([0-9]+)$").unwrap();
[INFO] [stderr] 143 | |             static ref FLOATP: Regex = Regex::new(r"^([0-9]+\.[0-9]+)$").unwrap();
[INFO] [stderr] 144 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/program.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |           lazy_static!{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 141 | |             static ref SUBLINK: Regex = Regex::new(r"^&([0-9]*)$").unwrap();
[INFO] [stderr] 142 | |             static ref INTEGER: Regex = Regex::new(r"^([0-9]+)$").unwrap();
[INFO] [stderr] 143 | |             static ref FLOATP: Regex = Regex::new(r"^([0-9]+\.[0-9]+)$").unwrap();
[INFO] [stderr] 144 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/program.rs:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |           lazy_static!{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 141 | |             static ref SUBLINK: Regex = Regex::new(r"^&([0-9]*)$").unwrap();
[INFO] [stderr] 142 | |             static ref INTEGER: Regex = Regex::new(r"^([0-9]+)$").unwrap();
[INFO] [stderr] 143 | |             static ref FLOATP: Regex = Regex::new(r"^([0-9]+\.[0-9]+)$").unwrap();
[INFO] [stderr] 144 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(inclusive_range_syntax)] // range syntax additions
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `target_feature` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(target_feature, cfg_target_feature)] // target feature branching
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `cfg_target_feature` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:5:28
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(target_feature, cfg_target_feature)] // target feature branching
[INFO] [stderr]   |                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `match_default_bindings` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(match_default_bindings, match_beginning_vert)] // simplify matching
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `match_beginning_vert` has been stable since 1.25.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:6:36
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(match_default_bindings, match_beginning_vert)] // simplify matching
[INFO] [stderr]   |                                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `underscore_lifetimes` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(underscore_lifetimes, in_band_lifetimes, nll, nested_method_call)] // simplify lifetimes
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `universal_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(universal_impl_trait, conservative_impl_trait, dyn_trait)] // impl trait
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:8:34
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(universal_impl_trait, conservative_impl_trait, dyn_trait)] // impl trait
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `dyn_trait` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:8:59
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(universal_impl_trait, conservative_impl_trait, dyn_trait)] // impl trait
[INFO] [stderr]   |                                                           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `copy_closures` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(copy_closures, clone_closures)] // closures enhancement
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `clone_closures` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(copy_closures, clone_closures)] // closures enhancement
[INFO] [stderr]   |                           ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `termination_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:10:23
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(try_trait, termination_trait, catch_expr)] // error handling
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `use_nested_groups` has been stable since 1.25.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(use_nested_groups, crate_in_paths, crate_visibility_modifier, non_modrs_mods)] // module handling
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `crate_in_paths` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:11:31
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(use_nested_groups, crate_in_paths, crate_visibility_modifier, non_modrs_mods)] // module handling
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `non_modrs_mods` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:11:74
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(use_nested_groups, crate_in_paths, crate_visibility_modifier, non_modrs_mods)] // module handling
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:12:24
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(decl_macro, proc_macro)] // macro improvements
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `nested_method_call`
[INFO] [stderr]  --> src/main.rs:7:58
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(underscore_lifetimes, in_band_lifetimes, nll, nested_method_call)] // simplify lifetimes
[INFO] [stderr]   |                                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `catch_expr`
[INFO] [stderr]   --> src/main.rs:10:42
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(try_trait, termination_trait, catch_expr)] // error handling
[INFO] [stderr]    |                                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: Could not compile `bracket2`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(inclusive_range_syntax)] // range syntax additions
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `target_feature` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(target_feature, cfg_target_feature)] // target feature branching
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `cfg_target_feature` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:5:28
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(target_feature, cfg_target_feature)] // target feature branching
[INFO] [stderr]   |                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `match_default_bindings` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(match_default_bindings, match_beginning_vert)] // simplify matching
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `match_beginning_vert` has been stable since 1.25.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:6:36
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(match_default_bindings, match_beginning_vert)] // simplify matching
[INFO] [stderr]   |                                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `underscore_lifetimes` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(underscore_lifetimes, in_band_lifetimes, nll, nested_method_call)] // simplify lifetimes
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `universal_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(universal_impl_trait, conservative_impl_trait, dyn_trait)] // impl trait
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:8:34
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(universal_impl_trait, conservative_impl_trait, dyn_trait)] // impl trait
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `dyn_trait` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:8:59
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(universal_impl_trait, conservative_impl_trait, dyn_trait)] // impl trait
[INFO] [stderr]   |                                                           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `copy_closures` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(copy_closures, clone_closures)] // closures enhancement
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `clone_closures` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(copy_closures, clone_closures)] // closures enhancement
[INFO] [stderr]   |                           ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `termination_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:10:23
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(try_trait, termination_trait, catch_expr)] // error handling
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `use_nested_groups` has been stable since 1.25.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(use_nested_groups, crate_in_paths, crate_visibility_modifier, non_modrs_mods)] // module handling
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `crate_in_paths` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:11:31
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(use_nested_groups, crate_in_paths, crate_visibility_modifier, non_modrs_mods)] // module handling
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `non_modrs_mods` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:11:74
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(use_nested_groups, crate_in_paths, crate_visibility_modifier, non_modrs_mods)] // module handling
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/main.rs:12:24
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(decl_macro, proc_macro)] // macro improvements
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `nested_method_call`
[INFO] [stderr]  --> src/main.rs:7:58
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(underscore_lifetimes, in_band_lifetimes, nll, nested_method_call)] // simplify lifetimes
[INFO] [stderr]   |                                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `catch_expr`
[INFO] [stderr]   --> src/main.rs:10:42
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(try_trait, termination_trait, catch_expr)] // error handling
[INFO] [stderr]    |                                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: Could not compile `bracket2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4ae7103c6df17be45bb18d1111c04302946e7f7ab7d7166beead6089ad53d3ad"`
[INFO] running `"docker" "rm" "-f" "4ae7103c6df17be45bb18d1111c04302946e7f7ab7d7166beead6089ad53d3ad"`
[INFO] [stdout] 4ae7103c6df17be45bb18d1111c04302946e7f7ab7d7166beead6089ad53d3ad