[INFO] cloning repository https://github.com/matt24smith/ecfuzz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matt24smith/ecfuzz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatt24smith%2Fecfuzz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatt24smith%2Fecfuzz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e054d326a03e7a14ac70050cee4b47c6742a57af
[INFO] checking matt24smith/ecfuzz against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatt24smith%2Fecfuzz" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matt24smith/ecfuzz 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 git repo https://github.com/matt24smith/ecfuzz
[INFO] finished tweaking git repo https://github.com/matt24smith/ecfuzz
[INFO] tweaked toml for git repo https://github.com/matt24smith/ecfuzz written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/matt24smith/ecfuzz already has a lockfile, it will not be regenerated
[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 async-lock v3.1.0
[INFO] [stderr]   Downloaded async-channel v2.1.0
[INFO] [stderr]   Downloaded value-bag v1.4.2
[INFO] [stderr]   Downloaded async-executor v1.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] cca7a1ccbea3844b93548ab76106e972ccfbf8eedbc989621da4cfc9bfb860b5
[INFO] running `Command { std: "docker" "start" "-a" "cca7a1ccbea3844b93548ab76106e972ccfbf8eedbc989621da4cfc9bfb860b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cca7a1ccbea3844b93548ab76106e972ccfbf8eedbc989621da4cfc9bfb860b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cca7a1ccbea3844b93548ab76106e972ccfbf8eedbc989621da4cfc9bfb860b5", kill_on_drop: false }`
[INFO] [stdout] cca7a1ccbea3844b93548ab76106e972ccfbf8eedbc989621da4cfc9bfb860b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 712f68da841cca7ba529a208e3a0b04f48b528d7dfa51b612b8644bfe2b699d4
[INFO] running `Command { std: "docker" "start" "-a" "712f68da841cca7ba529a208e3a0b04f48b528d7dfa51b612b8644bfe2b699d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking parking v2.2.0
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]     Checking value-bag v1.4.2
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]    Compiling rustix v0.37.27
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking futures-lite v2.0.1
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]     Checking atomic-waker v1.1.2
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]     Checking futures-sink v0.3.29
[INFO] [stderr]     Checking async-task v4.5.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking event-listener v3.1.0
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]     Checking event-listener-strategy v0.3.0
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking async-lock v3.1.0
[INFO] [stderr]     Checking async-channel v2.1.0
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]     Checking xxhash-rust v0.8.7
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking async-executor v1.7.1
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking async-global-executor v2.3.1
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking futures-executor v0.3.29
[INFO] [stderr]     Checking futures v0.3.29
[INFO] [stderr]     Checking ecfuzz v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]    --> src/grammar_tree.rs:744:9
[INFO] [stdout]     |
[INFO] [stdout] 743 |     use super::*;
[INFO] [stdout]     |         -------- the item `Read` is already imported here
[INFO] [stdout] 744 |     use std::io::Read;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PathBuf` is imported redundantly
[INFO] [stdout]    --> src/grammar_tree.rs:745:9
[INFO] [stdout]     |
[INFO] [stdout] 743 |     use super::*;
[INFO] [stdout]     |         -------- the item `PathBuf` is already imported here
[INFO] [stdout] 744 |     use std::io::Read;
[INFO] [stdout] 745 |     use std::path::PathBuf;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]    --> src/mutator.rs:463:9
[INFO] [stdout]     |
[INFO] [stdout] 460 |     use super::*;
[INFO] [stdout]     |         -------- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 463 |     use std::io::Write;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2`
[INFO] [stdout]    --> src/execute.rs:507:26
[INFO] [stdout]     |
[INFO] [stdout] 507 |                 let (p1, p2) =
[INFO] [stdout]     |                          ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2`
[INFO] [stdout]    --> src/execute.rs:507:26
[INFO] [stdout]     |
[INFO] [stdout] 507 |                 let (p1, p2) =
[INFO] [stdout]     |                          ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.84s
[INFO] running `Command { std: "docker" "inspect" "712f68da841cca7ba529a208e3a0b04f48b528d7dfa51b612b8644bfe2b699d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "712f68da841cca7ba529a208e3a0b04f48b528d7dfa51b612b8644bfe2b699d4", kill_on_drop: false }`
[INFO] [stdout] 712f68da841cca7ba529a208e3a0b04f48b528d7dfa51b612b8644bfe2b699d4