[INFO] fetching crate fastgraph 0.1.21...
[INFO] checking fastgraph-0.1.21 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate fastgraph 0.1.21 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate fastgraph 0.1.21 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fastgraph 0.1.21
[INFO] finished tweaking crates.io crate fastgraph 0.1.21
[INFO] tweaked toml for crates.io crate fastgraph 0.1.21 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 75 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding parking_lot v0.11.2 (latest: v0.12.1)
[INFO] [stderr]       Adding parking_lot_core v0.8.6 (latest: v0.9.9)
[INFO] [stderr]       Adding redox_syscall v0.2.16 (latest: v0.5.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded primes v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45c6aff0a6d8ad75d977941884828f4440121e5b0d5c7d363852153d9f425315
[INFO] running `Command { std: "docker" "start" "-a" "45c6aff0a6d8ad75d977941884828f4440121e5b0d5c7d363852153d9f425315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45c6aff0a6d8ad75d977941884828f4440121e5b0d5c7d363852153d9f425315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45c6aff0a6d8ad75d977941884828f4440121e5b0d5c7d363852153d9f425315", kill_on_drop: false }`
[INFO] [stdout] 45c6aff0a6d8ad75d977941884828f4440121e5b0d5c7d363852153d9f425315
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80c9b04e3537829e40f919d4478735bb23ab2beee772892683b9078587641c53
[INFO] running `Command { std: "docker" "start" "-a" "80c9b04e3537829e40f919d4478735bb23ab2beee772892683b9078587641c53", kill_on_drop: false }`
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking primes v0.3.0
[INFO] [stderr]     Checking fastgraph v0.1.21 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `Empty` is imported redundantly
[INFO] [stdout]  --> tests/basic.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use fastgraph::core::*;
[INFO] [stdout]   |     ------------------ the item `Empty` is already imported here
[INFO] [stdout] 2 | use fastgraph::collections::*;
[INFO] [stdout] 3 | use fastgraph::core::Empty;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Empty` is imported redundantly
[INFO] [stdout]  --> benches/digraph_benchmark.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use fastgraph::core::Empty;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 | use fastgraph::{collections::*, core::*};
[INFO] [stdout]   |                                 ------- the item `Empty` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Empty` is imported redundantly
[INFO] [stdout]  --> tests/max_flow.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use fastgraph::core::*;
[INFO] [stdout]   |     ------------------ the item `Empty` is already imported here
[INFO] [stdout] 2 | use fastgraph::collections::*;
[INFO] [stdout] 3 | use fastgraph::core::Empty;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.62s
[INFO] running `Command { std: "docker" "inspect" "80c9b04e3537829e40f919d4478735bb23ab2beee772892683b9078587641c53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80c9b04e3537829e40f919d4478735bb23ab2beee772892683b9078587641c53", kill_on_drop: false }`
[INFO] [stdout] 80c9b04e3537829e40f919d4478735bb23ab2beee772892683b9078587641c53
[INFO] checking fastgraph-0.1.21 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate fastgraph 0.1.21 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate fastgraph 0.1.21 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fastgraph 0.1.21
[INFO] finished tweaking crates.io crate fastgraph 0.1.21
[INFO] tweaked toml for crates.io crate fastgraph 0.1.21 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 29d1b0a337b0d132a84be4ab7f60aec64e7a38fb2b81fb83205aa160acb6b4b4
[INFO] running `Command { std: "docker" "start" "-a" "29d1b0a337b0d132a84be4ab7f60aec64e7a38fb2b81fb83205aa160acb6b4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29d1b0a337b0d132a84be4ab7f60aec64e7a38fb2b81fb83205aa160acb6b4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29d1b0a337b0d132a84be4ab7f60aec64e7a38fb2b81fb83205aa160acb6b4b4", kill_on_drop: false }`
[INFO] [stdout] 29d1b0a337b0d132a84be4ab7f60aec64e7a38fb2b81fb83205aa160acb6b4b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a414b7feed31907bc9b2e537ecfecdf482b8206f9781e85fda1890079499bd9
[INFO] running `Command { std: "docker" "start" "-a" "0a414b7feed31907bc9b2e537ecfecdf482b8206f9781e85fda1890079499bd9", kill_on_drop: false }`
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking primes v0.3.0
[INFO] [stderr]     Checking fastgraph v0.1.21 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `Empty` is imported redundantly
[INFO] [stdout]  --> tests/basic.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use fastgraph::core::*;
[INFO] [stdout]   |     ------------------ the item `Empty` is already imported here
[INFO] [stdout] 2 | use fastgraph::collections::*;
[INFO] [stdout] 3 | use fastgraph::core::Empty;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Empty` is imported redundantly
[INFO] [stdout]  --> tests/max_flow.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use fastgraph::core::*;
[INFO] [stdout]   |     ------------------ the item `Empty` is already imported here
[INFO] [stdout] 2 | use fastgraph::collections::*;
[INFO] [stdout] 3 | use fastgraph::core::Empty;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Empty` is imported redundantly
[INFO] [stdout]  --> benches/digraph_benchmark.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use fastgraph::core::Empty;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 | use fastgraph::{collections::*, core::*};
[INFO] [stdout]   |                                 ------- the item `Empty` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.64s
[INFO] running `Command { std: "docker" "inspect" "0a414b7feed31907bc9b2e537ecfecdf482b8206f9781e85fda1890079499bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a414b7feed31907bc9b2e537ecfecdf482b8206f9781e85fda1890079499bd9", kill_on_drop: false }`
[INFO] [stdout] 0a414b7feed31907bc9b2e537ecfecdf482b8206f9781e85fda1890079499bd9