[INFO] crate phase2 0.2.2 is already in cache
[INFO] extracting crate phase2 0.2.2 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/phase2/0.2.2
[INFO] extracting crate phase2 0.2.2 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/phase2/0.2.2
[INFO] validating manifest of phase2-0.2.2 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of phase2-0.2.2 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing phase2-0.2.2
[INFO] finished frobbing phase2-0.2.2
[INFO] frobbed toml for phase2-0.2.2 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/phase2/0.2.2/Cargo.toml
[INFO] started frobbing phase2-0.2.2
[INFO] finished frobbing phase2-0.2.2
[INFO] frobbed toml for phase2-0.2.2 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/phase2/0.2.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking phase2-0.2.2 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-1/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/phase2/0.2.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c57529e58384fe13b9f7bd92faab4f30192532c69ca155390d99e3cd4edb90d3
[INFO] running `"docker" "start" "-a" "c57529e58384fe13b9f7bd92faab4f30192532c69ca155390d99e3cd4edb90d3"`
[INFO] [stderr]     Checking pairing v0.14.2
[INFO] [stderr]     Checking bellman v0.1.0
[INFO] [stderr]     Checking phase2 v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Arc` is imported redundantly
[INFO] [stderr]     --> src/lib.rs:1203:21
[INFO] [stderr]      |
[INFO] [stderr] 225  |         Arc
[INFO] [stderr]      |         --- the item `Arc` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 1203 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]      |                     ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Arc` is imported redundantly
[INFO] [stderr]     --> src/lib.rs:1203:21
[INFO] [stderr]      |
[INFO] [stderr] 225  |         Arc
[INFO] [stderr]      |         --- the item `Arc` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 1203 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]      |                     ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> examples/mimc.rs:111:17
[INFO] [stderr]     |
[INFO] [stderr] 111 |             let mut tmp_value = xl_value.map(|mut e| {
[INFO] [stderr]     |                 ----^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> examples/mimc.rs:116:17
[INFO] [stderr]     |
[INFO] [stderr] 116 |             let mut tmp = cs.alloc(|| "tmp", || {
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> examples/mimc.rs:130:17
[INFO] [stderr]     |
[INFO] [stderr] 130 |             let mut new_xl_value = xl_value.map(|mut e| {
[INFO] [stderr]     |                 ----^^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> examples/mimc.rs:137:17
[INFO] [stderr]     |
[INFO] [stderr] 137 |             let mut new_xl = if i == (MIMC_ROUNDS-1) {
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.19s
[INFO] running `"docker" "inspect" "c57529e58384fe13b9f7bd92faab4f30192532c69ca155390d99e3cd4edb90d3"`
[INFO] running `"docker" "rm" "-f" "c57529e58384fe13b9f7bd92faab4f30192532c69ca155390d99e3cd4edb90d3"`
[INFO] [stdout] c57529e58384fe13b9f7bd92faab4f30192532c69ca155390d99e3cd4edb90d3