[INFO] fetching crate memdb 1.0.0...
[INFO] extracting crate memdb 1.0.0 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/memdb/1.0.0
[INFO] extracting crate memdb 1.0.0 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/memdb/1.0.0
[INFO] validating manifest of memdb-1.0.0 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of memdb-1.0.0 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing memdb-1.0.0
[INFO] finished frobbing memdb-1.0.0
[INFO] frobbed toml for memdb-1.0.0 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/memdb/1.0.0/Cargo.toml
[INFO] started frobbing memdb-1.0.0
[INFO] finished frobbing memdb-1.0.0
[INFO] frobbed toml for memdb-1.0.0 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/memdb/1.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking memdb-1.0.0 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-2/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/memdb/1.0.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3400706029b87ac6703c91c765b11196f5ed8bedf9f88dd814c59e2577c62df7
[INFO] running `"docker" "start" "-a" "3400706029b87ac6703c91c765b11196f5ed8bedf9f88dd814c59e2577c62df7"`
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking crossbeam v0.6.0
[INFO] [stderr]     Checking romio v0.3.0-alpha.9
[INFO] [stderr]     Checking memdb v1.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking juliex v0.3.0-alpha.7
[INFO] [stderr]     Checking runtime-native v0.3.0-alpha.5
[INFO] [stderr]    Compiling runtime-attributes v0.3.0-alpha.5
[INFO] [stderr]     Checking runtime v0.3.0-alpha.6
[INFO] [stderr] warning: unused import: `std::error`
[INFO] [stderr]  --> tests/test.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::error;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.05s
[INFO] running `"docker" "inspect" "3400706029b87ac6703c91c765b11196f5ed8bedf9f88dd814c59e2577c62df7"`
[INFO] running `"docker" "rm" "-f" "3400706029b87ac6703c91c765b11196f5ed8bedf9f88dd814c59e2577c62df7"`
[INFO] [stdout] 3400706029b87ac6703c91c765b11196f5ed8bedf9f88dd814c59e2577c62df7