[INFO] fetching crate bubbles 4.1.0...
[INFO] testing bubbles-4.1.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate bubbles 4.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate bubbles 4.1.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bubbles 4.1.0
[INFO] finished tweaking crates.io crate bubbles 4.1.0
[INFO] tweaked toml for crates.io crate bubbles 4.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate bubbles 4.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9072e622cfdfdb09df38f2d27298e89810a6713c03bb2c14f31ea19d79c5fcab
[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" "9072e622cfdfdb09df38f2d27298e89810a6713c03bb2c14f31ea19d79c5fcab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9072e622cfdfdb09df38f2d27298e89810a6713c03bb2c14f31ea19d79c5fcab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9072e622cfdfdb09df38f2d27298e89810a6713c03bb2c14f31ea19d79c5fcab", kill_on_drop: false }`
[INFO] [stdout] 9072e622cfdfdb09df38f2d27298e89810a6713c03bb2c14f31ea19d79c5fcab
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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] f8d2a5620eeb7e559e4c0f8a9c6286a66b9124daef5ba27134bc8c487a89bab2
[INFO] running `Command { std: "docker" "start" "-a" "f8d2a5620eeb7e559e4c0f8a9c6286a66b9124daef5ba27134bc8c487a89bab2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
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[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling version_check v0.9.3
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[INFO] [stderr]    Compiling radium v0.5.3
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[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling rustversion v1.0.5
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling crc32fast v1.2.1
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[INFO] [stderr]    Compiling regex-syntax v0.3.9
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[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling atty v0.2.14
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[INFO] [stderr]    Compiling daemonize v0.4.1
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[INFO] [stderr]    Compiling clap v2.33.3
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[INFO] [stderr]    Compiling rand v0.3.23
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[INFO] [stderr]    Compiling tiff v0.7.1
[INFO] [stderr]    Compiling hdf5-src v0.8.0
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling libgit2-sys v0.12.24+1.3.0
[INFO] [stderr]    Compiling zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stderr]    Compiling hdf5-bitshuffle v0.8.0
[INFO] [stderr]    Compiling ndarray v0.15.3
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling quickcheck v0.2.27
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling vergen v5.1.16
[INFO] [stderr]    Compiling glm v0.2.3
[INFO] [stderr]    Compiling hdf5-sys v0.8.0
[INFO] [stderr]    Compiling askama_shared v0.11.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling tokio-macros v1.5.0
[INFO] [stderr]    Compiling enum-iterator-derive v0.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling hdf5-derive v0.8.0
[INFO] [stderr]    Compiling askama_derive v0.10.5
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling cryiorust_derive v0.4.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]    Compiling actix_derive v0.6.0
[INFO] [stderr]    Compiling actix_derive v0.5.0
[INFO] [stderr]    Compiling enum-iterator v0.7.0
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling async-stream v0.3.2
[INFO] [stderr]    Compiling git2 v0.13.23
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling actix-rt v2.3.0
[INFO] [stderr]    Compiling tokio-util v0.6.8
[INFO] [stderr]    Compiling actix v0.12.0
[INFO] [stdout] error[E0658]: the `must_not_suspend` lint is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/vergen-5.1.16/src/lib.rs:300:5
[INFO] [stdout]     |
[INFO] [stdout] 300 |     deny(break_with_label_and_loop, deref_into_dyn_supertrait, must_not_suspend,)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #83310 <https://github.com/rust-lang/rust/issues/83310> for more information
[INFO] [stdout]     = help: add `#![feature(must_not_suspend)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vergen` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f8d2a5620eeb7e559e4c0f8a9c6286a66b9124daef5ba27134bc8c487a89bab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8d2a5620eeb7e559e4c0f8a9c6286a66b9124daef5ba27134bc8c487a89bab2", kill_on_drop: false }`
[INFO] [stdout] f8d2a5620eeb7e559e4c0f8a9c6286a66b9124daef5ba27134bc8c487a89bab2