[INFO] updating cached repository https://github.com/omerbenamram/pymft-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 329cf05ff3697eb6f1f2d788fe3f47ad558a613a
[INFO] checking omerbenamram/pymft-rs against master#eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc for pr-69560
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fomerbenamram%2Fpymft-rs" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/omerbenamram/pymft-rs on toolchain eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/omerbenamram/pymft-rs
[INFO] finished tweaking git repo https://github.com/omerbenamram/pymft-rs
[INFO] tweaked toml for git repo https://github.com/omerbenamram/pymft-rs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/omerbenamram/pymft-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: unused manifest key: dependencies.mft.no-default-features
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 708e1ffc0164893b1fdddf81b74e99b8ea6d9f30edf275d34a3d45eb8dc83fa9
[INFO] running `"docker" "start" "-a" "708e1ffc0164893b1fdddf81b74e99b8ea6d9f30edf275d34a3d45eb8dc83fa9"`
[INFO] [stderr] warning: unused manifest key: dependencies.mft.no-default-features
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling pyo3-derive-backend v0.9.0-alpha.1
[INFO] [stderr]    Compiling ctor v0.1.12
[INFO] [stderr]    Compiling ghost v0.1.1
[INFO] [stderr]    Compiling inventory-impl v0.1.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling serde_json v1.0.44
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]    Compiling indoc-impl v0.3.4
[INFO] [stderr]    Compiling paste-impl v0.1.6
[INFO] [stderr]     Checking inventory v0.1.5
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]     Checking console v0.9.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling pyo3cls v0.9.0-alpha.1
[INFO] [stderr]     Checking simplelog v0.7.4
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking indoc v0.3.4
[INFO] [stderr]     Checking dialoguer v0.5.0
[INFO] [stderr]     Checking paste v0.1.6
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking winstructs v0.3.0
[INFO] [stderr]     Checking hashbrown v0.6.3
[INFO] [stderr]     Checking lru v0.4.3
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling pyo3 v0.9.0-alpha.1
[INFO] [stderr]    Compiling mft v0.5.1
[INFO] [stderr]    Compiling pyo3-file v0.3.1-alpha.1
[INFO] [stderr]     Checking mft v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::ops::Try`
[INFO] [stderr]  --> src/entry.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::ops::Try;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Try`
[INFO] [stderr]  --> src/entry.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::ops::Try;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `inner`
[INFO] [stderr]    --> src/attribute.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 169 |     inner: AttributeListAttr,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `inner`
[INFO] [stderr]    --> src/attribute.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 169 |     inner: AttributeListAttr,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 26s
[INFO] running `"docker" "inspect" "708e1ffc0164893b1fdddf81b74e99b8ea6d9f30edf275d34a3d45eb8dc83fa9"`
[INFO] running `"docker" "rm" "-f" "708e1ffc0164893b1fdddf81b74e99b8ea6d9f30edf275d34a3d45eb8dc83fa9"`
[INFO] [stdout] 708e1ffc0164893b1fdddf81b74e99b8ea6d9f30edf275d34a3d45eb8dc83fa9