[INFO] fetching crate casper-engine-test-support 7.0.0...
[INFO] checking casper-engine-test-support-7.0.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate casper-engine-test-support 7.0.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate casper-engine-test-support 7.0.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate casper-engine-test-support 7.0.0
[INFO] finished tweaking crates.io crate casper-engine-test-support 7.0.0
[INFO] tweaked toml for crates.io crate casper-engine-test-support 7.0.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 188 packages
[INFO] [stderr]       Adding base64 v0.13.1 (latest: v0.22.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding blake2 v0.9.2 (latest: v0.10.6)
[INFO] [stderr]       Adding crypto-mac v0.8.0 (latest: v0.11.1)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
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[INFO] [stderr]       Adding hostname v0.3.1 (latest: v0.4.0)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
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[INFO] [stderr]       Adding proc-macro2 v0.4.30 (latest: v1.0.79)
[INFO] [stderr]       Adding proptest-derive v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding pulldown-cmark v0.9.6 (latest: v0.10.2)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding quote v0.6.13 (latest: v1.0.35)
[INFO] [stderr]       Adding schemars v0.8.5 (latest: v0.8.16)
[INFO] [stderr]       Adding schemars_derive v0.8.5 (latest: v0.8.16)
[INFO] [stderr]       Adding serde_derive_internals v0.25.0 (latest: v0.29.0)
[INFO] [stderr]       Adding strum v0.24.1 (latest: v0.26.2)
[INFO] [stderr]       Adding strum_macros v0.24.3 (latest: v0.26.2)
[INFO] [stderr]       Adding syn v0.15.44 (latest: v2.0.58)
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[INFO] [stderr]       Adding toml v0.5.11 (latest: v0.8.12)
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[INFO] [stderr]       Adding toml_edit v0.19.15 (latest: v0.22.9)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (latest: v0.2.4)
[INFO] [stderr]       Adding untrusted v0.7.1 (latest: v0.9.0)
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[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding winnow v0.5.40 (latest: v0.6.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded filesize v0.2.0
[INFO] [stderr]   Downloaded lmdb-rkv v0.14.0
[INFO] [stderr]   Downloaded schemars v0.8.5
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[INFO] [stderr]   Downloaded derp v0.0.14
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[INFO] [stderr]   Downloaded casper-wasmi-core v0.2.1
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[INFO] [stderr]   Downloaded datasize v0.2.15
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[INFO] [stderr]   Downloaded casper-wasm-utils v3.0.0
[INFO] [stderr]   Downloaded casper-wasm v0.46.0
[INFO] [stderr]   Downloaded casper-execution-engine v7.0.1
[INFO] [stderr]   Downloaded lmdb-rkv-sys v0.11.2
[INFO] [stderr]   Downloaded casper-wasmi v0.13.2
[INFO] [stderr]   Downloaded k256 v0.13.3
[INFO] [stderr]   Downloaded casper-types v4.0.1
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[INFO] [stderr]   Downloaded casper-hashing v3.0.0
[INFO] [stderr]   Downloaded base16 v0.2.1
[INFO] [stderr]   Downloaded blake2 v0.9.2
[INFO] [stderr]   Downloaded schemars_derive v0.8.5
[INFO] [stderr]   Downloaded hex_fmt v0.3.0
[INFO] [stderr]   Downloaded pem v0.8.3
[INFO] [stderr]   Downloaded serde_derive_internals v0.25.0
[INFO] [stderr]   Downloaded value-bag v1.8.1
[INFO] [stderr]   Downloaded version-sync v0.9.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bc79e94be0d0bc20878d38de3343570a56eb142e5e46b6fb2945fdf9f2d8a1a
[INFO] running `Command { std: "docker" "start" "-a" "3bc79e94be0d0bc20878d38de3343570a56eb142e5e46b6fb2945fdf9f2d8a1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bc79e94be0d0bc20878d38de3343570a56eb142e5e46b6fb2945fdf9f2d8a1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bc79e94be0d0bc20878d38de3343570a56eb142e5e46b6fb2945fdf9f2d8a1a", kill_on_drop: false }`
[INFO] [stdout] 3bc79e94be0d0bc20878d38de3343570a56eb142e5e46b6fb2945fdf9f2d8a1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e10c8f5e769cc894958c329230ca07d084395fb3a1b2f67e44282ae1cb7bbd2
[INFO] running `Command { std: "docker" "start" "-a" "1e10c8f5e769cc894958c329230ca07d084395fb3a1b2f67e44282ae1cb7bbd2", kill_on_drop: false }`
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking base16ct v0.2.0
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling curve25519-dalek-derive v0.1.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]    Compiling schemars v0.8.5
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking der v0.7.9
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking bit-set v0.5.3
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[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]    Compiling lmdb-rkv-sys v0.11.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking group v0.13.0
[INFO] [stderr]     Checking casper-wasm v0.46.0
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking derp v0.0.14
[INFO] [stderr]     Checking rand_pcg v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling unicase v2.7.0
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[INFO] [stderr]     Checking memory_units v0.4.0
[INFO] [stderr]     Checking hex_fmt v0.3.0
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking crypto-bigint v0.5.5
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking blake2 v0.9.2
[INFO] [stderr]     Checking base16 v0.2.1
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[INFO] [stderr]     Checking rfc6979 v0.4.0
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[INFO] [stderr]    Compiling pulldown-cmark v0.9.6
[INFO] [stderr]     Checking winnow v0.5.40
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking filesize v0.2.0
[INFO] [stderr]     Checking casper-wasmi-validation v0.5.0
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking proptest v1.4.0
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[INFO] [stderr]     Checking num-bigint v0.4.4
[INFO] [stderr]     Checking num-iter v0.1.44
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[INFO] [stderr]     Checking hex v0.4.3
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[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking casper-wasmi-core v0.2.1
[INFO] [stderr]     Checking toml_edit v0.19.15
[INFO] [stderr]     Checking k256 v0.13.3
[INFO] [stderr]    Compiling serde_derive_internals v0.25.0
[INFO] [stderr]     Checking casper-wasmi v0.13.2
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]    Compiling schemars_derive v0.8.5
[INFO] [stderr]    Compiling datasize_derive v0.2.15
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking toml v0.7.8
[INFO] [stderr]    Compiling proptest-derive v0.3.0
[INFO] [stderr]     Checking datasize v0.2.15
[INFO] [stderr]     Checking version-sync v0.9.5
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking casper-types v4.0.1
[INFO] [stderr]     Checking casper-hashing v3.0.0
[INFO] [stderr]     Checking casper-execution-engine v7.0.1
[INFO] [stderr]     Checking casper-engine-test-support v7.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/auction.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashSet, convert::TryFrom, io::Write, time::Instant};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/chainspec_config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     convert::TryFrom,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/wasm_test_builder.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 |     convert::{TryFrom, TryInto},
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/wasm_test_builder.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 |     convert::{TryFrom, TryInto},
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]   --> src/additive_map_diff.rs:56:16
[INFO] [stdout]    |
[INFO] [stdout] 56 |     use rand::{self, Rng};
[INFO] [stdout]    |                ^^^^ the item `rand` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Key` is imported redundantly
[INFO] [stdout]   --> src/additive_map_diff.rs:58:38
[INFO] [stdout]    |
[INFO] [stdout] 58 |     use casper_types::{AccessRights, Key, URef, BLAKE2B_DIGEST_LENGTH};
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 59 |
[INFO] [stdout] 60 |     use super::*;
[INFO] [stdout]    |         -------- the item `Key` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/auction.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashSet, convert::TryFrom, io::Write, time::Instant};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/chainspec_config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     convert::TryFrom,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]    --> src/chainspec_config.rs:220:15
[INFO] [stdout]     |
[INFO] [stdout] 220 |     use std::{convert::TryFrom, path::PathBuf};
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/wasm_test_builder.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 |     convert::{TryFrom, TryInto},
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/wasm_test_builder.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 |     convert::{TryFrom, TryInto},
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.58s
[INFO] running `Command { std: "docker" "inspect" "1e10c8f5e769cc894958c329230ca07d084395fb3a1b2f67e44282ae1cb7bbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e10c8f5e769cc894958c329230ca07d084395fb3a1b2f67e44282ae1cb7bbd2", kill_on_drop: false }`
[INFO] [stdout] 1e10c8f5e769cc894958c329230ca07d084395fb3a1b2f67e44282ae1cb7bbd2