[INFO] fetching crate zerogc-simple 0.2.0-alpha.1...
[INFO] checking zerogc-simple-0.2.0-alpha.1 against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] extracting crate zerogc-simple 0.2.0-alpha.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate zerogc-simple 0.2.0-alpha.1 on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zerogc-simple 0.2.0-alpha.1
[INFO] finished tweaking crates.io crate zerogc-simple 0.2.0-alpha.1
[INFO] tweaked toml for crates.io crate zerogc-simple 0.2.0-alpha.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate zerogc-simple 0.2.0-alpha.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", 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] 5c52f4a41b96f0537d54a47a8abda8fc6946b348f54338e74b2b6a18371ce0e9
[INFO] running `Command { std: "docker" "start" "-a" "5c52f4a41b96f0537d54a47a8abda8fc6946b348f54338e74b2b6a18371ce0e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c52f4a41b96f0537d54a47a8abda8fc6946b348f54338e74b2b6a18371ce0e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c52f4a41b96f0537d54a47a8abda8fc6946b348f54338e74b2b6a18371ce0e9", kill_on_drop: false }`
[INFO] [stdout] 5c52f4a41b96f0537d54a47a8abda8fc6946b348f54338e74b2b6a18371ce0e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 408b7adbf0a7d357ebb3b9b2b945c829a8bbeadadfabb941e0f9b3c77ae68f2e
[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" "408b7adbf0a7d357ebb3b9b2b945c829a8bbeadadfabb941e0f9b3c77ae68f2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking zerogc v0.2.0-alpha.1
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking thread_local v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking zerogc-context v0.2.0-alpha.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking zerogc-simple v0.2.0-alpha.1 (/opt/rustwide/workdir)
[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: 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[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.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[zerogc(collector_id(SimpleCollectorId))]
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `zerogc` in this scope
[INFO] [stdout]   --> examples/binary_trees.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |     #[zerogc(mutable(public))]
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CollectorId as SimpleCollectorId`
[INFO] [stdout]  --> examples/binary_trees.rs:5:66
[INFO] [stdout]   |
[INFO] [stdout] 5 | use zerogc_simple::{SimpleCollector, SimpleCollectorContext, Gc, CollectorId as SimpleCollectorId};
[INFO] [stdout]   |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[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/cargo-home/registry/src/github.com-1ecc6299db9ec823/zerogc-0.2.0-alpha.1/src/lib.rs:412:23
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub struct Gc<'gc, T: GcSafe + ?Sized + 'gc, Id: CollectorId> {
[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/cargo-home/registry/src/github.com-1ecc6299db9ec823/zerogc-0.2.0-alpha.1/src/lib.rs:412:23
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub struct Gc<'gc, T: GcSafe + ?Sized + 'gc, Id: CollectorId> {
[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] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: the trait bound `Tree<'gc>: GcSafe` is not satisfied
[INFO] [stdout]    --> examples/binary_trees.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/cargo-home/registry/src/github.com-1ecc6299db9ec823/zerogc-0.2.0-alpha.1/src/lib.rs:412:23
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub struct Gc<'gc, T: GcSafe + ?Sized + 'gc, Id: CollectorId> {
[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: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/cargo-home/registry/src/github.com-1ecc6299db9ec823/zerogc-0.2.0-alpha.1/src/lib.rs:412:23
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub struct Gc<'gc, T: GcSafe + ?Sized + 'gc, Id: CollectorId> {
[INFO] [stdout]     |                       ------ required by this bound in `Gc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "408b7adbf0a7d357ebb3b9b2b945c829a8bbeadadfabb941e0f9b3c77ae68f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "408b7adbf0a7d357ebb3b9b2b945c829a8bbeadadfabb941e0f9b3c77ae68f2e", kill_on_drop: false }`
[INFO] [stdout] 408b7adbf0a7d357ebb3b9b2b945c829a8bbeadadfabb941e0f9b3c77ae68f2e