[INFO] crate diff_fmt 0.1.0 is already in cache
[INFO] checking diff_fmt-0.1.0 against try#8a5e87609850cdd8679aada01eb0f3062f254ca8 for pr-71140
[INFO] extracting crate diff_fmt 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate diff_fmt 0.1.0 on toolchain 8a5e87609850cdd8679aada01eb0f3062f254ca8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate diff_fmt 0.1.0
[INFO] finished tweaking crates.io crate diff_fmt 0.1.0
[INFO] tweaked toml for crates.io crate diff_fmt 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "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] 0a90415c26f7589e5fbca02f545fc6918858a9e29f4f0bd6a094ecfbe9b805c5
[INFO] running `"docker" "start" "-a" "0a90415c26f7589e5fbca02f545fc6918858a9e29f4f0bd6a094ecfbe9b805c5"`
[INFO] [stderr]     Checking diff_fmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: could not find `Position` in `v1`
[INFO] [stderr]   --> src/lib.rs:40:40
[INFO] [stderr]    |
[INFO] [stderr] 40 |         position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stderr]    |                                        ^^^^^^^^ could not find `Position` in `v1`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `Position` in `v1`
[INFO] [stderr]    --> src/lib.rs:491:48
[INFO] [stderr]     |
[INFO] [stderr] 491 |                 position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stderr]     |                                                ^^^^^^^^ could not find `Position` in `v1`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `Position` in `v1`
[INFO] [stderr]    --> src/lib.rs:508:48
[INFO] [stderr]     |
[INFO] [stderr] 508 |                 position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stderr]     |                                                ^^^^^^^^ could not find `Position` in `v1`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `Position` in `v1`
[INFO] [stderr]   --> src/lib.rs:40:40
[INFO] [stderr]    |
[INFO] [stderr] 40 |         position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stderr]    |                                        ^^^^^^^^ could not find `Position` in `v1`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: could not compile `diff_fmt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: could not compile `diff_fmt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0a90415c26f7589e5fbca02f545fc6918858a9e29f4f0bd6a094ecfbe9b805c5"`
[INFO] running `"docker" "rm" "-f" "0a90415c26f7589e5fbca02f545fc6918858a9e29f4f0bd6a094ecfbe9b805c5"`
[INFO] [stdout] 0a90415c26f7589e5fbca02f545fc6918858a9e29f4f0bd6a094ecfbe9b805c5