[INFO] fetching crate libzkbob-rs 1.4.3...
[INFO] checking libzkbob-rs-1.4.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate libzkbob-rs 1.4.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate libzkbob-rs 1.4.3 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 libzkbob-rs 1.4.3
[INFO] finished tweaking crates.io crate libzkbob-rs 1.4.3
[INFO] tweaked toml for crates.io crate libzkbob-rs 1.4.3 written to /workspace/builds/worker-4-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 194 packages
[INFO] [stderr]       Adding aead v0.4.3 (latest: v0.5.2)
[INFO] [stderr]       Adding ahash v0.7.8 (latest: v0.8.11)
[INFO] [stderr]       Adding arrayvec v0.4.12 (latest: v0.7.4)
[INFO] [stderr]       Adding base64 v0.13.1 (latest: v0.22.0)
[INFO] [stderr]       Adding bindgen v0.59.2 (latest: v0.69.4)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.2.1 (latest: v0.3.3)
[INFO] [stderr]       Adding borsh v0.9.3 (latest: v1.4.0)
[INFO] [stderr]       Adding borsh-derive v0.9.3 (latest: v1.4.0)
[INFO] [stderr]       Adding borsh-derive-internal v0.9.3 (latest: v0.10.3)
[INFO] [stderr]       Adding borsh-schema-derive-internal v0.9.3 (latest: v0.10.3)
[INFO] [stderr]       Adding brotli v3.5.0 (latest: v4.0.0)
[INFO] [stderr]       Adding brotli-decompressor v2.5.1 (latest: v3.0.0)
[INFO] [stderr]       Adding bs58 v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding chacha20 v0.7.3 (latest: v0.9.1)
[INFO] [stderr]       Adding chacha20poly1305 v0.8.2 (latest: v0.10.1)
[INFO] [stderr]       Adding cipher v0.3.0 (latest: v0.4.4)
[INFO] [stderr]       Adding constant_time_eq v0.1.5 (latest: v0.3.0)
[INFO] [stderr]       Adding convert_case v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding ff_ce v0.7.1 (latest: v0.14.3)
[INFO] [stderr]       Adding ff_derive_ce v0.5.1 (latest: v0.11.2)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.12)
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding hashbrown v0.11.2 (latest: v0.14.3)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding hex v0.3.2 (latest: v0.4.3)
[INFO] [stderr]       Adding impl-trait-for-tuples v0.1.3 (latest: v0.2.2)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding kvdb v0.9.0 (latest: v0.13.0)
[INFO] [stderr]       Adding kvdb-memorydb v0.9.0 (latest: v0.13.0)
[INFO] [stderr]       Adding kvdb-rocksdb v0.11.1 (latest: v0.19.0)
[INFO] [stderr]       Adding libloading v0.5.2 (latest: v0.8.3)
[INFO] [stderr]       Adding num-bigint v0.2.6 (latest: v0.4.4)
[INFO] [stderr]       Adding num-bigint v0.3.3 (latest: v0.4.4)
[INFO] [stderr]       Adding parity-util-mem v0.9.0 (latest: v0.12.0)
[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 peeking_take_while v0.1.2 (latest: v1.0.0)
[INFO] [stderr]       Adding poly1305 v0.7.2 (latest: v0.8.0)
[INFO] [stderr]       Adding proc-macro-crate v0.1.5 (latest: v3.1.0)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (latest: v1.0.79)
[INFO] [stderr]       Adding quote v0.6.13 (latest: v1.0.35)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding redox_syscall v0.2.16 (latest: v0.5.1)
[INFO] [stderr]       Adding rocksdb v0.16.0 (latest: v0.22.0)
[INFO] [stderr]       Adding send_wrapper v0.5.0 (latest: v0.6.0)
[INFO] [stderr]       Adding sha3 v0.9.1 (latest: v0.10.8)
[INFO] [stderr]       Adding subtle v2.4.1 (latest: v2.5.0)
[INFO] [stderr]       Adding syn v0.14.9 (latest: v2.0.58)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding test-case v1.2.3 (latest: v3.3.1)
[INFO] [stderr]       Adding toml v0.5.11 (latest: v0.8.12)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (latest: v0.2.4)
[INFO] [stderr]       Adding universal-hash v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding zeroize v1.3.0 (latest: v1.7.0)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fawkes-crypto-zkbob v4.7.0
[INFO] [stderr]   Downloaded seedbox v0.2.0
[INFO] [stderr]   Downloaded ff-uint v0.2.4
[INFO] [stderr]   Downloaded fs-swap v0.2.6
[INFO] [stderr]   Downloaded send_wrapper v0.5.0
[INFO] [stderr]   Downloaded parity-util-mem v0.9.0
[INFO] [stderr]   Downloaded kvdb v0.9.0
[INFO] [stderr]   Downloaded concat-idents v1.1.5
[INFO] [stderr]   Downloaded libloading v0.5.2
[INFO] [stderr]   Downloaded blake2-rfc_bellman_edition v0.0.1
[INFO] [stderr]   Downloaded libloading v0.8.3
[INFO] [stderr]   Downloaded brotli-decompressor v2.5.1
[INFO] [stderr]   Downloaded bindgen v0.59.2
[INFO] [stderr]   Downloaded fawkes-crypto-zkbob-pairing_ce v0.19.0
[INFO] [stderr]   Downloaded fawkes-crypto-zkbob-bellman_ce v0.4.0
[INFO] [stderr]   Downloaded syn v0.14.9
[INFO] [stderr]   Downloaded num-bigint v0.3.3
[INFO] [stderr]   Downloaded brotli v3.5.0
[INFO] [stderr]   Downloaded clang-sys v1.7.0
[INFO] [stderr]   Downloaded rocksdb v0.16.0
[INFO] [stderr]   Downloaded poly1305 v0.7.2
[INFO] [stderr]   Downloaded chacha20poly1305 v0.8.2
[INFO] [stderr]   Downloaded ff_ce v0.7.1
[INFO] [stderr]   Downloaded kvdb-rocksdb v0.11.1
[INFO] [stderr]   Downloaded aead v0.4.3
[INFO] [stderr]   Downloaded chacha20 v0.7.3
[INFO] [stderr]   Downloaded alloc-no-stdlib v2.0.4
[INFO] [stderr]   Downloaded ff_derive_ce v0.5.1
[INFO] [stderr]   Downloaded ff-uint_derive v0.2.4
[INFO] [stderr]   Downloaded ref-cast v1.0.22
[INFO] [stderr]   Downloaded rustc-hex v2.1.0
[INFO] [stderr]   Downloaded kvdb-memorydb v0.9.0
[INFO] [stderr]   Downloaded parity-util-mem-derive v0.1.0
[INFO] [stderr]   Downloaded kvdb-web v0.9.0
[INFO] [stderr]   Downloaded arrayvec v0.4.12
[INFO] [stderr]   Downloaded alloc-stdlib v0.2.2
[INFO] [stderr]   Downloaded fawkes-crypto_derive v4.3.0
[INFO] [stderr]   Downloaded ref-cast-impl v1.0.22
[INFO] [stderr]   Downloaded impl-trait-for-tuples v0.1.3
[INFO] [stderr]   Downloaded linked-list v0.0.3
[INFO] [stderr]   Downloaded fawkes-crypto-zkbob-keccak256 v0.1.1
[INFO] [stderr]   Downloaded libzeropool-zkbob v1.3.0
[INFO] [stderr]   Downloaded test-case v1.2.3
[INFO] [stderr]   Downloaded librocksdb-sys v6.20.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b740d59387b0be8f8d7cacdf62ce984de3e415c2cb3ee2a6ba1424a99b8f8e67
[INFO] running `Command { std: "docker" "start" "-a" "b740d59387b0be8f8d7cacdf62ce984de3e415c2cb3ee2a6ba1424a99b8f8e67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b740d59387b0be8f8d7cacdf62ce984de3e415c2cb3ee2a6ba1424a99b8f8e67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b740d59387b0be8f8d7cacdf62ce984de3e415c2cb3ee2a6ba1424a99b8f8e67", kill_on_drop: false }`
[INFO] [stdout] b740d59387b0be8f8d7cacdf62ce984de3e415c2cb3ee2a6ba1424a99b8f8e67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e8cecb6f2628d2fa181b63810f4a9808f03be340665a5d9effbdc7be639df3f2
[INFO] running `Command { std: "docker" "start" "-a" "e8cecb6f2628d2fa181b63810f4a9808f03be340665a5d9effbdc7be639df3f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking keccak v0.1.5
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
[INFO] [stderr]    Compiling ref-cast v1.0.22
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking ahash v0.7.8
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]    Compiling ref-cast-impl v1.0.22
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking brotli-decompressor v2.5.1
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking seedbox v0.2.0
[INFO] [stderr]    Compiling concat-idents v1.1.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling parity-util-mem v0.9.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking blake2-rfc_bellman_edition v0.0.1
[INFO] [stderr]     Checking universal-hash v0.4.1
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]     Checking linked-list v0.0.3
[INFO] [stderr]     Checking zeroize v1.3.0
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking poly1305 v0.7.2
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking chacha20 v0.7.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling test-case v1.2.3
[INFO] [stderr]     Checking convert_case v0.4.0
[INFO] [stderr]     Checking bs58 v0.4.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]     Checking brotli v3.5.0
[INFO] [stderr]     Checking aead v0.4.3
[INFO] [stderr]     Checking chacha20poly1305 v0.8.2
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling ff_derive_ce v0.5.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.3
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.3
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking ff_ce v0.7.1
[INFO] [stderr]     Checking fawkes-crypto-zkbob-pairing_ce v0.19.0
[INFO] [stderr]    Compiling borsh-derive v0.9.3
[INFO] [stderr]    Compiling ff-uint_derive v0.2.4
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.1.3
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.2
[INFO] [stderr]    Compiling fawkes-crypto_derive v4.3.0
[INFO] [stderr]    Compiling parity-util-mem-derive v0.1.0
[INFO] [stderr]     Checking fawkes-crypto-zkbob-bellman_ce v0.4.0
[INFO] [stderr]     Checking borsh v0.9.3
[INFO] [stderr]     Checking ff-uint v0.2.4
[INFO] [stderr]     Checking fawkes-crypto-zkbob v4.7.0
[INFO] [stderr]     Checking kvdb v0.9.0
[INFO] [stderr]     Checking kvdb-memorydb v0.9.0
[INFO] [stderr]     Checking fawkes-crypto-zkbob-keccak256 v0.1.1
[INFO] [stderr]     Checking libzeropool-zkbob v1.3.0
[INFO] [stderr]     Checking libzkbob-rs v1.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `CustomRng` is imported redundantly
[INFO] [stdout]    --> src/client/mod.rs:647:9
[INFO] [stdout]     |
[INFO] [stdout] 645 |     use super::*;
[INFO] [stdout]     |         -------- the item `CustomRng` is already imported here
[INFO] [stdout] 646 |     use libzeropool::POOL_PARAMS;
[INFO] [stdout] 647 |     use crate::random::CustomRng;
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.71s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "e8cecb6f2628d2fa181b63810f4a9808f03be340665a5d9effbdc7be639df3f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8cecb6f2628d2fa181b63810f4a9808f03be340665a5d9effbdc7be639df3f2", kill_on_drop: false }`
[INFO] [stdout] e8cecb6f2628d2fa181b63810f4a9808f03be340665a5d9effbdc7be639df3f2