[INFO] fetching crate zerogc-simple 0.1.1...
[INFO] checking zerogc-simple-0.1.1 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate zerogc-simple 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate zerogc-simple 0.1.1 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zerogc-simple 0.1.1
[INFO] finished tweaking crates.io crate zerogc-simple 0.1.1
[INFO] tweaked toml for crates.io crate zerogc-simple 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate zerogc-simple 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v1.4.1
[INFO] [stderr]   Downloaded rayon-core v1.7.1
[INFO] [stderr]   Downloaded memoffset v0.5.5
[INFO] [stderr]   Downloaded rayon v1.3.1
[INFO] [stderr]   Downloaded libc v0.2.73
[INFO] [stderr]   Downloaded zerogc v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d83c8dcf2184df3321287969562907a66b4c9a15b21b213ffd5f6c424a5a6d7
[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" "7d83c8dcf2184df3321287969562907a66b4c9a15b21b213ffd5f6c424a5a6d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d83c8dcf2184df3321287969562907a66b4c9a15b21b213ffd5f6c424a5a6d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d83c8dcf2184df3321287969562907a66b4c9a15b21b213ffd5f6c424a5a6d7", kill_on_drop: false }`
[INFO] [stdout] 7d83c8dcf2184df3321287969562907a66b4c9a15b21b213ffd5f6c424a5a6d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 033b8b0f7571a37dfa4f17b5418d815651a0d1e221ef3b6b5da504941de2c093
[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" "033b8b0f7571a37dfa4f17b5418d815651a0d1e221ef3b6b5da504941de2c093", kill_on_drop: false }`
[INFO] [stderr]    Compiling rayon-core v1.7.1
[INFO] [stderr]     Checking smallvec v1.4.1
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking zerogc v0.1.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling rayon v1.3.1
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking zerogc-simple v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     specialization, // Effectively required by GcRef :(
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]     Checking slog-term v2.6.0
[INFO] [stdout] error[E0432]: unresolved import `zerogc_derive`
[INFO] [stdout]  --> examples/binary_trees_parallel.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use zerogc_derive::Trace;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ use of undeclared crate or module `zerogc_derive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Trace`
[INFO] [stdout]   --> examples/binary_trees_parallel.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `zerogc_derive`
[INFO] [stdout]  --> examples/binary_trees.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use zerogc_derive::Trace;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ use of undeclared crate or module `zerogc_derive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `Trace`
[INFO] [stdout]   --> examples/binary_trees.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `zerogc` in this scope
[INFO] [stdout]   --> examples/binary_trees_parallel.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |     #[zerogc(mutable(public))]
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `zerogc` in this scope
[INFO] [stdout]   --> examples/binary_trees.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[zerogc(mutable(public))]
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     specialization, // Effectively required by GcRef :(
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tree<'gc>: GcSafe` is not satisfied
[INFO] [stdout]   --> examples/binary_trees_parallel.rs:26:27
[INFO] [stdout]    |
[INFO] [stdout] 26 |                        -> Gc<'gc, Tree<'gc>> {
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^ the trait `GcSafe` is not implemented for `Tree<'gc>`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/workdir/src/lib.rs:78:23
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Gc<'gc, T: GcSafe + 'gc> {
[INFO] [stdout]    |                       ------ required by this bound in `Gc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tree<'gc>: GcSafe` is not satisfied
[INFO] [stdout]   --> examples/binary_trees.rs:25:27
[INFO] [stdout]    |
[INFO] [stdout] 25 |                        -> Gc<'gc, Tree<'gc>> {
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^ the trait `GcSafe` is not implemented for `Tree<'gc>`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/workdir/src/lib.rs:78:23
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Gc<'gc, T: GcSafe + 'gc> {
[INFO] [stdout]    |                       ------ required by this bound in `Gc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tree<'gc>: GcSafe` is not satisfied
[INFO] [stdout]   --> examples/binary_trees.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     children: GcCell<Option<(Gc<'gc, Tree<'gc>>, Gc<'gc, Tree<'gc>>)>>,
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `GcSafe` is not implemented for `Tree<'gc>`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/workdir/src/lib.rs:78:23
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Gc<'gc, T: GcSafe + 'gc> {
[INFO] [stdout]    |                       ------ required by this bound in `Gc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tree<'gc>: GcSafe` is not satisfied
[INFO] [stdout]   --> examples/binary_trees_parallel.rs:14:15
[INFO] [stdout]    |
[INFO] [stdout] 14 |     children: GcCell<Option<(Gc<'gc, Tree<'gc>>, Gc<'gc, Tree<'gc>>)>>,
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `GcSafe` is not implemented for `Tree<'gc>`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/workdir/src/lib.rs:78:23
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Gc<'gc, T: GcSafe + 'gc> {
[INFO] [stdout]    |                       ------ required by this bound in `Gc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zerogc-simple`
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "033b8b0f7571a37dfa4f17b5418d815651a0d1e221ef3b6b5da504941de2c093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "033b8b0f7571a37dfa4f17b5418d815651a0d1e221ef3b6b5da504941de2c093", kill_on_drop: false }`
[INFO] [stdout] 033b8b0f7571a37dfa4f17b5418d815651a0d1e221ef3b6b5da504941de2c093