[INFO] fetching crate sssmc39 0.0.3...
[INFO] checking sssmc39-0.0.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate sssmc39 0.0.3 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate sssmc39 0.0.3 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 sssmc39 0.0.3
[INFO] finished tweaking crates.io crate sssmc39 0.0.3
[INFO] tweaked toml for crates.io crate sssmc39 0.0.3 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 94 packages
[INFO] [stderr]       Adding aho-corasick v0.5.3 (latest: v1.1.3)
[INFO] [stderr]       Adding autocfg v0.1.8 (latest: v1.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding bitvec v0.17.4 (latest: v1.0.1)
[INFO] [stderr]       Adding block-buffer v0.7.3 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.1.5 (latest: v0.3.3)
[INFO] [stderr]       Adding cloudabi v0.0.3 (latest: v0.1.0)
[INFO] [stderr]       Adding crypto-mac v0.7.0 (latest: v0.11.1)
[INFO] [stderr]       Adding digest v0.8.1 (latest: v0.10.7)
[INFO] [stderr]       Adding env_logger v0.3.5 (latest: v0.11.3)
[INFO] [stderr]       Adding flate2 v0.2.20 (latest: v1.0.28)
[INFO] [stderr]       Adding generic-array v0.12.4 (latest: v1.0.0)
[INFO] [stderr]       Adding hmac v0.7.1 (latest: v0.12.1)
[INFO] [stderr]       Adding itertools v0.7.11 (latest: v0.12.1)
[INFO] [stderr]       Adding log v0.3.9 (latest: v0.4.21)
[INFO] [stderr]       Adding memchr v0.1.11 (latest: v2.7.2)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding opaque-debug v0.2.3 (latest: v0.3.1)
[INFO] [stderr]       Adding pbkdf2 v0.3.0 (latest: v0.12.2)
[INFO] [stderr]       Adding quickcheck v0.4.1 (latest: v1.0.3)
[INFO] [stderr]       Adding radium v0.3.0 (latest: v1.1.0)
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.6.5 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.1.1 (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_hc v0.1.0 (latest: v0.3.2)
[INFO] [stderr]       Adding rand_isaac v0.1.1 (latest: v0.3.0)
[INFO] [stderr]       Adding rand_jitter v0.1.4 (latest: v0.4.0)
[INFO] [stderr]       Adding rand_os v0.1.3 (latest: v0.2.2)
[INFO] [stderr]       Adding rand_pcg v0.1.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_xorshift v0.1.1 (latest: v0.3.0)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding regex v0.1.80 (latest: v1.10.4)
[INFO] [stderr]       Adding regex-syntax v0.3.9 (latest: v0.8.3)
[INFO] [stderr]       Adding ring v0.16.20 (latest: v0.17.8)
[INFO] [stderr]       Adding sha2 v0.8.2 (latest: v0.10.8)
[INFO] [stderr]       Adding spin v0.5.2 (latest: v0.9.8)
[INFO] [stderr]       Adding subtle v1.0.0 (latest: v2.5.0)
[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 thread-id v2.0.0 (latest: v4.2.1)
[INFO] [stderr]       Adding thread_local v0.2.7 (latest: v1.1.8)
[INFO] [stderr]       Adding untrusted v0.7.1 (latest: v0.9.0)
[INFO] [stderr]       Adding utf8-ranges v0.1.3 (latest: v1.0.5)
[INFO] [stderr]       Adding winapi v0.2.8 (latest: v0.3.9)
[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 pbkdf2 v0.3.0
[INFO] [stderr]   Downloaded quickcheck v0.4.1
[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] 24e5271fa1f093f2da9c7ae79b12350a810a2c347c495fbb8f0ae18292222832
[INFO] running `Command { std: "docker" "start" "-a" "24e5271fa1f093f2da9c7ae79b12350a810a2c347c495fbb8f0ae18292222832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24e5271fa1f093f2da9c7ae79b12350a810a2c347c495fbb8f0ae18292222832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e5271fa1f093f2da9c7ae79b12350a810a2c347c495fbb8f0ae18292222832", kill_on_drop: false }`
[INFO] [stdout] 24e5271fa1f093f2da9c7ae79b12350a810a2c347c495fbb8f0ae18292222832
[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] 3b86965c289178d5ffe144c804b86185dab507f71bc0d3f1d3c2b230f455e5a6
[INFO] running `Command { std: "docker" "start" "-a" "3b86965c289178d5ffe144c804b86185dab507f71bc0d3f1d3c2b230f455e5a6", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking ring v0.16.20
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking quickcheck v0.4.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking sssmc39 v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/field/gf256.rs:119:34
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub static ref TABLES: Tables = { Tables::generate() };
[INFO] [stdout]     |                                     ^^                  ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 119 -     pub static ref TABLES: Tables = { Tables::generate() };
[INFO] [stdout] 119 +     pub static ref TABLES: Tables = Tables::generate();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/shamir/share.rs:27:41
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub static ref WORDLIST: Vec<String> = { include_str!("wordlists/en.txt").split_whitespace().map(|s| s.into()).collect() };
[INFO] [stdout]    |                                            ^^                                                                               ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 27 -     pub static ref WORDLIST: Vec<String> = { include_str!("wordlists/en.txt").split_whitespace().map(|s| s.into()).collect() };
[INFO] [stdout] 27 +     pub static ref WORDLIST: Vec<String> = include_str!("wordlists/en.txt").split_whitespace().map(|s| s.into()).collect();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/field/gf256.rs:119:34
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub static ref TABLES: Tables = { Tables::generate() };
[INFO] [stdout]     |                                     ^^                  ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 119 -     pub static ref TABLES: Tables = { Tables::generate() };
[INFO] [stdout] 119 +     pub static ref TABLES: Tables = Tables::generate();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]    --> src/field/lagrange.rs:142:6
[INFO] [stdout]     |
[INFO] [stdout] 142 |     use std;
[INFO] [stdout]     |         ^^^ the item `std` is already defined by prelude
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/shamir/share.rs:27:41
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub static ref WORDLIST: Vec<String> = { include_str!("wordlists/en.txt").split_whitespace().map(|s| s.into()).collect() };
[INFO] [stdout]    |                                            ^^                                                                               ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 27 -     pub static ref WORDLIST: Vec<String> = { include_str!("wordlists/en.txt").split_whitespace().map(|s| s.into()).collect() };
[INFO] [stdout] 27 +     pub static ref WORDLIST: Vec<String> = include_str!("wordlists/en.txt").split_whitespace().map(|s| s.into()).collect();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]    --> src/shamir/share.rs:353:6
[INFO] [stdout]     |
[INFO] [stdout] 351 |     use super::*;
[INFO] [stdout]     |         -------- the item `Error` is already imported here
[INFO] [stdout] 352 |
[INFO] [stdout] 353 |     use crate::error::Error;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]    --> src/util/bitpacker.rs:186:6
[INFO] [stdout]     |
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `Error` is already imported here
[INFO] [stdout] 185 |
[INFO] [stdout] 186 |     use crate::error::Error;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]   --> src/util/rs1024.rs:78:6
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use super::*;
[INFO] [stdout]    |         -------- the item `Error` is already imported here
[INFO] [stdout] 77 |
[INFO] [stdout] 78 |     use crate::error::Error;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/shamir/splitter.rs:232:3
[INFO] [stdout]     |
[INFO] [stdout] 232 |         ret_vec.split_off(4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let _ = ret_vec.split_off(4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> tests/ref_vectors.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[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: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/shamir/splitter.rs:232:3
[INFO] [stdout]     |
[INFO] [stdout] 232 |         ret_vec.split_off(4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let _ = ret_vec.split_off(4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.08s
[INFO] running `Command { std: "docker" "inspect" "3b86965c289178d5ffe144c804b86185dab507f71bc0d3f1d3c2b230f455e5a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b86965c289178d5ffe144c804b86185dab507f71bc0d3f1d3c2b230f455e5a6", kill_on_drop: false }`
[INFO] [stdout] 3b86965c289178d5ffe144c804b86185dab507f71bc0d3f1d3c2b230f455e5a6