[INFO] fetching crate libafl 0.7.1...
[INFO] checking libafl-0.7.1 against try#42d1facfffa1a5357d6d62815f7be91f8ad69ed8 for pr-95474
[INFO] extracting crate libafl 0.7.1 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate libafl 0.7.1 on toolchain 42d1facfffa1a5357d6d62815f7be91f8ad69ed8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libafl 0.7.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate libafl 0.7.1
[INFO] tweaked toml for crates.io crate libafl 0.7.1 written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate crates.io crate libafl 0.7.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c6984bac56f02221283722f79b64d1d7496edcef904c2e18e03bccfbcccb37c
[INFO] running `Command { std: "docker" "start" "-a" "0c6984bac56f02221283722f79b64d1d7496edcef904c2e18e03bccfbcccb37c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c6984bac56f02221283722f79b64d1d7496edcef904c2e18e03bccfbcccb37c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c6984bac56f02221283722f79b64d1d7496edcef904c2e18e03bccfbcccb37c", kill_on_drop: false }`
[INFO] [stdout] 0c6984bac56f02221283722f79b64d1d7496edcef904c2e18e03bccfbcccb37c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+42d1facfffa1a5357d6d62815f7be91f8ad69ed8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56973352b99fdb61e9cdeaee63a60abf6a939fcc9d826bd4e9ee63f9bee43e8b
[INFO] running `Command { std: "docker" "start" "-a" "56973352b99fdb61e9cdeaee63a60abf6a939fcc9d826bd4e9ee63f9bee43e8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
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[INFO] [stderr]    Compiling libafl v0.7.1 (/opt/rustwide/workdir)
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[INFO] [stderr]    Compiling ctor v0.1.21
[INFO] [stderr]    Compiling serial_test_derive v0.5.1
[INFO] [stderr]    Compiling libafl_derive v0.7.1
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[INFO] [stderr]     Checking serial_test v0.5.1
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[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:6:39
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(unstable_feature, feature(specialization))]
[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] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:6:39
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(unstable_feature, feature(specialization))]
[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] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.88s
[INFO] running `Command { std: "docker" "inspect" "56973352b99fdb61e9cdeaee63a60abf6a939fcc9d826bd4e9ee63f9bee43e8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56973352b99fdb61e9cdeaee63a60abf6a939fcc9d826bd4e9ee63f9bee43e8b", kill_on_drop: false }`
[INFO] [stdout] 56973352b99fdb61e9cdeaee63a60abf6a939fcc9d826bd4e9ee63f9bee43e8b