[INFO] fetching crate std_collection_traits 0.1.2... [INFO] testing std_collection_traits-0.1.2 against 1.55.0 for beta-1.56-1 [INFO] extracting crate std_collection_traits 0.1.2 into /workspace/builds/worker-6/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-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 88ecab67aa3687ce3565aaa53dc7e57c039d358650d90c98440cfb31bd6f96bb [INFO] running `Command { std: "docker" "start" "-a" "88ecab67aa3687ce3565aaa53dc7e57c039d358650d90c98440cfb31bd6f96bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "88ecab67aa3687ce3565aaa53dc7e57c039d358650d90c98440cfb31bd6f96bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "88ecab67aa3687ce3565aaa53dc7e57c039d358650d90c98440cfb31bd6f96bb", kill_on_drop: false }` [INFO] [stdout] 88ecab67aa3687ce3565aaa53dc7e57c039d358650d90c98440cfb31bd6f96bb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7093e5b75a056028855b09770a5052579b48e08efb61fbab76dcd9dfa4a7e873 [INFO] running `Command { std: "docker" "start" "-a" "7093e5b75a056028855b09770a5052579b48e08efb61fbab76dcd9dfa4a7e873", kill_on_drop: false }` [INFO] [stderr] Compiling 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, impl FnMut(&'a K) -> (&'a K, &'a ())>; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #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, impl FnMut(&'a K) -> (&'a K, &'a ())>; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #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 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 | <$t>::shrink_to(self, min_capacity) [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 111 | / capacity_impls!( [INFO] [stdout] 112 | | [@Cap T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] 113 | | [@CapCtor T => Vec]; [INFO] [stdout] 114 | | [@CapShrink T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] ... | [INFO] [stdout] 138 | | [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap]; [INFO] [stdout] 139 | | ); [INFO] [stdout] | |______- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unstable_name_collisions)]` on by default [INFO] [stdout] = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior! [INFO] [stdout] = note: for more information, see issue #48919 [INFO] [stdout] = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method [INFO] [stdout] = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future [INFO] [stdout] --> src/capacity.rs:78:21 [INFO] [stdout] | [INFO] [stdout] 78 | <$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]; [INFO] [stdout] 113 | | [@CapCtor T => Vec]; [INFO] [stdout] 114 | | [@CapShrink T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] ... | [INFO] [stdout] 138 | | [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap]; [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 [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 | <$t>::shrink_to(self, min_capacity) [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 111 | / capacity_impls!( [INFO] [stdout] 112 | | [@Cap T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] 113 | | [@CapCtor T => Vec]; [INFO] [stdout] 114 | | [@CapShrink T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] ... | [INFO] [stdout] 138 | | [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap]; [INFO] [stdout] 139 | | ); [INFO] [stdout] | |______- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior! [INFO] [stdout] = note: for more information, see issue #48919 [INFO] [stdout] = help: call with fully qualified syntax `capacity::CapacityShrink::shrink_to(...)` to keep using the current method [INFO] [stdout] = note: this warning originates in the macro `capacity_impls` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future [INFO] [stdout] --> src/capacity.rs:78:21 [INFO] [stdout] | [INFO] [stdout] 78 | <$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]; [INFO] [stdout] 113 | | [@CapCtor T => Vec]; [INFO] [stdout] 114 | | [@CapShrink T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] ... | [INFO] [stdout] 138 | | [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap]; [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 [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]; [INFO] [stdout] 113 | | [@CapCtor T => Vec]; [INFO] [stdout] 114 | | [@CapShrink T, A: std::alloc::Allocator => Vec]; [INFO] [stdout] ... | [INFO] [stdout] 138 | | [@CapReserve K: std::cmp::Eq | std::hash::Hash, V, S: std::hash::BuildHasher => std::collections::HashMap]; [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 [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] [stderr] error: could not compile `std_collection_traits` due to 18 previous errors; 6 warnings emitted [INFO] running `Command { std: "docker" "inspect" "7093e5b75a056028855b09770a5052579b48e08efb61fbab76dcd9dfa4a7e873", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7093e5b75a056028855b09770a5052579b48e08efb61fbab76dcd9dfa4a7e873", kill_on_drop: false }` [INFO] [stdout] 7093e5b75a056028855b09770a5052579b48e08efb61fbab76dcd9dfa4a7e873