[INFO] fetching crate pin-rc 0.1.0...
[INFO] testing pin-rc-0.1.0 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate pin-rc 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate pin-rc 0.1.0 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pin-rc 0.1.0
[INFO] finished tweaking crates.io crate pin-rc 0.1.0
[INFO] tweaked toml for crates.io crate pin-rc 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53cc3d24b2356bcccee34e329bd1fdb96253f9a215d04b27117a163e26d8d8a4
[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" "53cc3d24b2356bcccee34e329bd1fdb96253f9a215d04b27117a163e26d8d8a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53cc3d24b2356bcccee34e329bd1fdb96253f9a215d04b27117a163e26d8d8a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53cc3d24b2356bcccee34e329bd1fdb96253f9a215d04b27117a163e26d8d8a4", kill_on_drop: false }`
[INFO] [stdout] 53cc3d24b2356bcccee34e329bd1fdb96253f9a215d04b27117a163e26d8d8a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", 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] 104d1705ccb4b96954d26133ef43ef9dc60d3e715c5f7b693580639457f3b441
[INFO] running `Command { std: "docker" "start" "-a" "104d1705ccb4b96954d26133ef43ef9dc60d3e715c5f7b693580639457f3b441", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pin-rc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::mem::Pin`
[INFO] [stdout]  --> src/pin_rc.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::mem::Pin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ no `Pin` in `mem`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::mem::Pin`
[INFO] [stdout]  --> src/pin_arc.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::mem::Pin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ no `Pin` in `mem`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: yield syntax is experimental
[INFO] [stdout]   --> src/lib.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 yield i;
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
[INFO] [stdout]    = help: add `#![feature(generators)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: yield syntax is experimental
[INFO] [stdout]   --> src/lib.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 yield i;
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
[INFO] [stdout]    = help: add `#![feature(generators)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pin-rc` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "104d1705ccb4b96954d26133ef43ef9dc60d3e715c5f7b693580639457f3b441", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "104d1705ccb4b96954d26133ef43ef9dc60d3e715c5f7b693580639457f3b441", kill_on_drop: false }`
[INFO] [stdout] 104d1705ccb4b96954d26133ef43ef9dc60d3e715c5f7b693580639457f3b441