[INFO] crate sg 0.3.0 is already in cache
[INFO] extracting crate sg 0.3.0 into work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/sg/0.3.0
[INFO] extracting crate sg 0.3.0 into work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/sg/0.3.0
[INFO] validating manifest of sg-0.3.0 on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sg-0.3.0 on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sg-0.3.0
[INFO] finished frobbing sg-0.3.0
[INFO] frobbed toml for sg-0.3.0 written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/sg/0.3.0/Cargo.toml
[INFO] started frobbing sg-0.3.0
[INFO] finished frobbing sg-0.3.0
[INFO] frobbed toml for sg-0.3.0 written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/sg/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking sg-0.3.0 against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-6/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/sg/0.3.0:/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8a6a4a79bc680ae184012336df3ee57810abb261cf77a9b591ec225124929d08
[INFO] running `"docker" "start" "-a" "8a6a4a79bc680ae184012336df3ee57810abb261cf77a9b591ec225124929d08"`
[INFO] [stderr]    Compiling sg v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:206:20
[INFO] [stderr]     |
[INFO] [stderr] 206 |         for (task, mut iovec) in tasks.iter().zip(iovecs.iter_mut()) {
[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]    --> src/lib.rs:232:14
[INFO] [stderr]     |
[INFO] [stderr] 232 |         for (mut hdr, mut iovec) in hdrs.iter_mut().zip(iovecs.iter_mut()) {
[INFO] [stderr]     |              ----^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:232:23
[INFO] [stderr]     |
[INFO] [stderr] 232 |         for (mut hdr, mut iovec) in hdrs.iter_mut().zip(iovecs.iter_mut()) {
[INFO] [stderr]     |                       ----^^^^^
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:206:20
[INFO] [stderr]     |
[INFO] [stderr] 206 |         for (task, mut iovec) in tasks.iter().zip(iovecs.iter_mut()) {
[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]    --> src/lib.rs:232:14
[INFO] [stderr]     |
[INFO] [stderr] 232 |         for (mut hdr, mut iovec) in hdrs.iter_mut().zip(iovecs.iter_mut()) {
[INFO] [stderr]     |              ----^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:232:23
[INFO] [stderr]     |
[INFO] [stderr] 232 |         for (mut hdr, mut iovec) in hdrs.iter_mut().zip(iovecs.iter_mut()) {
[INFO] [stderr]     |                       ----^^^^^
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.73s
[INFO] running `"docker" "inspect" "8a6a4a79bc680ae184012336df3ee57810abb261cf77a9b591ec225124929d08"`
[INFO] running `"docker" "rm" "-f" "8a6a4a79bc680ae184012336df3ee57810abb261cf77a9b591ec225124929d08"`
[INFO] [stdout] 8a6a4a79bc680ae184012336df3ee57810abb261cf77a9b591ec225124929d08