[INFO] fetching crate std_collection_traits 0.1.2...
[INFO] checking std_collection_traits-0.1.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate std_collection_traits 0.1.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate std_collection_traits 0.1.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate std_collection_traits 0.1.2
[INFO] finished tweaking crates.io crate std_collection_traits 0.1.2
[INFO] tweaked toml for crates.io crate std_collection_traits 0.1.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 718c4bb52c8ad656b96e4f1735323e4d42ca1e357d642119db802f6db7b66a01
[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" "718c4bb52c8ad656b96e4f1735323e4d42ca1e357d642119db802f6db7b66a01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "718c4bb52c8ad656b96e4f1735323e4d42ca1e357d642119db802f6db7b66a01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "718c4bb52c8ad656b96e4f1735323e4d42ca1e357d642119db802f6db7b66a01", kill_on_drop: false }`
[INFO] [stdout] 718c4bb52c8ad656b96e4f1735323e4d42ca1e357d642119db802f6db7b66a01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99d5493a49eddaa4796b2584b014159f156f0c03c4c8f1ea13adc6718c0bf01e
[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" "99d5493a49eddaa4796b2584b014159f156f0c03c4c8f1ea13adc6718c0bf01e", kill_on_drop: false }`
[INFO] [stderr]     Checking std_collection_traits v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(array_methods)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(associated_type_defaults)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(try_reserve)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(trusted_random_access)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(slice_range)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(btree_drain_filter)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(drain_filter)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(hash_drain_filter)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(linked_list_remove)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![feature(map_try_insert)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(map_first_last)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(extend_one)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]    --> src/iter.rs:243:67
[INFO] [stdout]     |
[INFO] [stdout] 243 |         = std::iter::Map<std::collections::hash_set::Iter<'a, K>, impl FnMut(&'a K) -> (&'a K, &'a ())>;
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]    --> src/iter.rs:254:68
[INFO] [stdout]     |
[INFO] [stdout] 254 |         = std::iter::Map<std::collections::btree_set::Iter<'a, K>, impl FnMut(&'a K) -> (&'a K, &'a ())>;
[INFO] [stdout]     |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(array_methods)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(associated_type_defaults)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(try_reserve)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(trusted_random_access)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(slice_range)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(btree_drain_filter)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(drain_filter)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(hash_drain_filter)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(linked_list_remove)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![feature(map_try_insert)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(map_first_last)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(extend_one)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]    --> src/iter.rs:243:67
[INFO] [stdout]     |
[INFO] [stdout] 243 |         = std::iter::Map<std::collections::hash_set::Iter<'a, K>, impl FnMut(&'a K) -> (&'a K, &'a ())>;
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]    --> src/iter.rs:254:68
[INFO] [stdout]     |
[INFO] [stdout] 254 |         = std::iter::Map<std::collections::btree_set::Iter<'a, K>, impl FnMut(&'a K) -> (&'a K, &'a ())>;
[INFO] [stdout]     |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 17 previous errors; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/capacity.rs:78:21
[INFO] [stdout]     |
[INFO] [stdout] 78  |                       <$t>::shrink_to(self, min_capacity)
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 | /     capacity_impls!(
[INFO] [stdout] 112 | |         [@Cap T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] 113 | |         [@CapCtor T => Vec<T>];
[INFO] [stdout] 114 | |         [@CapShrink T, A: std::alloc::Allocator => Vec<T, A>];
[INFO] [stdout] ...   |
[INFO] [stdout] 138 | |         [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap<K, V, S>];
[INFO] [stdout] 139 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method
[INFO] [stdout]     = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `std_collection_traits` due to 18 previous errors; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 17 previous errors; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "99d5493a49eddaa4796b2584b014159f156f0c03c4c8f1ea13adc6718c0bf01e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99d5493a49eddaa4796b2584b014159f156f0c03c4c8f1ea13adc6718c0bf01e", kill_on_drop: false }`
[INFO] [stdout] 99d5493a49eddaa4796b2584b014159f156f0c03c4c8f1ea13adc6718c0bf01e
