[INFO] fetching crate cks_accumulator 0.1.2...
[INFO] checking cks_accumulator-0.1.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate cks_accumulator 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate cks_accumulator 0.1.2 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cks_accumulator 0.1.2
[INFO] finished tweaking crates.io crate cks_accumulator 0.1.2
[INFO] tweaked toml for crates.io crate cks_accumulator 0.1.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 64 packages to latest compatible versions
[INFO] [stderr]       Adding amcl_wrapper v0.3.5 (available: v0.4.0)
[INFO] [stderr]       Adding block-buffer v0.7.3 (available: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.1.5 (available: v0.3.3)
[INFO] [stderr]       Adding digest v0.8.1 (available: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.12.4 (available: v1.1.0)
[INFO] [stderr]       Adding getrandom v0.1.16 (available: v0.2.15)
[INFO] [stderr]       Adding opaque-debug v0.2.3 (available: v0.3.1)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (available: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.5.1 (available: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.2.0 (available: v0.3.2)
[INFO] [stderr]       Adding sha3 v0.8.2 (available: v0.10.8)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] [stderr]       Adding synstructure v0.12.6 (available: v0.13.1)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d7a2d333db910cb176bc2a7988c1725101afd3869bb19cfac67b3b279e4d392
[INFO] running `Command { std: "docker" "start" "-a" "7d7a2d333db910cb176bc2a7988c1725101afd3869bb19cfac67b3b279e4d392", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d7a2d333db910cb176bc2a7988c1725101afd3869bb19cfac67b3b279e4d392", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d7a2d333db910cb176bc2a7988c1725101afd3869bb19cfac67b3b279e4d392", kill_on_drop: false }`
[INFO] [stdout] 7d7a2d333db910cb176bc2a7988c1725101afd3869bb19cfac67b3b279e4d392
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85845025e6376de6f620c0764449bc31fc8018dc9fed162964daaf3cecdc5cbd
[INFO] running `Command { std: "docker" "start" "-a" "85845025e6376de6f620c0764449bc31fc8018dc9fed162964daaf3cecdc5cbd", kill_on_drop: false }`
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking gimli v0.31.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]     Checking miniz_oxide v0.8.0
[INFO] [stderr]     Checking object v0.36.4
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking rustc-demangle v0.1.24
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking keccak v0.1.5
[INFO] [stderr]     Checking serde_json v1.0.128
[INFO] [stderr]     Checking subtle-encoding v0.5.1
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]     Checking miracl_amcl v3.2.5
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking addr2line v0.24.1
[INFO] [stderr]     Checking amcl_wrapper v0.3.5
[INFO] [stderr]     Checking backtrace v0.3.74
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking cks_accumulator v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `generate_entries_from_trapdoor` is never used
[INFO] [stdout]    --> src/accumulator.rs:118:4
[INFO] [stdout]     |
[INFO] [stdout] 118 | fn generate_entries_from_trapdoor(size: usize, label: &[u8], gamma: &FieldElement) -> (G1Vector, G2Vector, GT) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/accumulator.rs:192:8
[INFO] [stdout]     |
[INFO] [stdout] 191 | impl InMemoryAccumulatorEntries {
[INFO] [stdout]     | ------------------------------- associated function in this implementation
[INFO] [stdout] 192 |     fn new(size: usize, label: &[u8]) -> (InMemoryAccumulatorEntries, FieldElement, GT) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `witness` is never read
[INFO] [stdout]    --> src/accumulator.rs:567:17
[INFO] [stdout]     |
[INFO] [stdout] 567 |         let mut witness: Option<Witness> = None;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.25s
[INFO] running `Command { std: "docker" "inspect" "85845025e6376de6f620c0764449bc31fc8018dc9fed162964daaf3cecdc5cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85845025e6376de6f620c0764449bc31fc8018dc9fed162964daaf3cecdc5cbd", kill_on_drop: false }`
[INFO] [stdout] 85845025e6376de6f620c0764449bc31fc8018dc9fed162964daaf3cecdc5cbd