[INFO] crate series 0.5.0 is already in cache
[INFO] extracting crate series 0.5.0 into work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/series/0.5.0
[INFO] extracting crate series 0.5.0 into work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/reg/series/0.5.0
[INFO] validating manifest of series-0.5.0 on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of series-0.5.0 on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing series-0.5.0
[INFO] finished frobbing series-0.5.0
[INFO] frobbed toml for series-0.5.0 written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/series/0.5.0/Cargo.toml
[INFO] started frobbing series-0.5.0
[INFO] finished frobbing series-0.5.0
[INFO] frobbed toml for series-0.5.0 written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/reg/series/0.5.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking series-0.5.0 against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-6/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/series/0.5.0:/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 99da72b76b7fdf79b0cad44c8d1011ee9913516fa6ea4205694b04f298a87dd4
[INFO] running `"docker" "start" "-a" "99da72b76b7fdf79b0cad44c8d1011ee9913516fa6ea4205694b04f298a87dd4"`
[INFO] [stderr]     Checking series v0.5.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:724:17
[INFO] [stderr]     |
[INFO] [stderr] 724 |             for mut b_n in & mut b {
[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[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> src/lib.rs:816:50
[INFO] [stderr]     |
[INFO] [stderr] 816 |                 b[n] -= num_factor * (&a[n-i] * &b[i]);
[INFO] [stderr]     |                 ---------------------------------^----
[INFO] [stderr]     |                 |                                |
[INFO] [stderr]     |                 |                                immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> src/lib.rs:864:50
[INFO] [stderr]     |
[INFO] [stderr] 864 |                 b[n] -= num_factor * (&a[n-i] * &b[i])/c_k0;
[INFO] [stderr]     |                 ---------------------------------^---------
[INFO] [stderr]     |                 |                                |
[INFO] [stderr]     |                 |                                immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:956:13
[INFO] [stderr]     |
[INFO] [stderr] 956 |         for mut coeff in &mut self.coeffs {
[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:978:13
[INFO] [stderr]     |
[INFO] [stderr] 978 |         for mut coeff in &mut self.coeffs {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stderr]     --> src/lib.rs:1056:50
[INFO] [stderr]      |
[INFO] [stderr] 1056 |                 b[n] -= num_factor * (&a[n-i] * &b[i]);
[INFO] [stderr]      |                 ---------------------------------^----
[INFO] [stderr]      |                 |                                |
[INFO] [stderr]      |                 |                                immutable borrow occurs here
[INFO] [stderr]      |                 mutable borrow occurs here
[INFO] [stderr]      |                 mutable borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:724:17
[INFO] [stderr]     |
[INFO] [stderr] 724 |             for mut b_n in & mut b {
[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[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> src/lib.rs:816:50
[INFO] [stderr]     |
[INFO] [stderr] 816 |                 b[n] -= num_factor * (&a[n-i] * &b[i]);
[INFO] [stderr]     |                 ---------------------------------^----
[INFO] [stderr]     |                 |                                |
[INFO] [stderr]     |                 |                                immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> src/lib.rs:864:50
[INFO] [stderr]     |
[INFO] [stderr] 864 |                 b[n] -= num_factor * (&a[n-i] * &b[i])/c_k0;
[INFO] [stderr]     |                 ---------------------------------^---------
[INFO] [stderr]     |                 |                                |
[INFO] [stderr]     |                 |                                immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:956:13
[INFO] [stderr]     |
[INFO] [stderr] 956 |         for mut coeff in &mut self.coeffs {
[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:978:13
[INFO] [stderr]     |
[INFO] [stderr] 978 |         for mut coeff in &mut self.coeffs {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stderr]     --> src/lib.rs:1056:50
[INFO] [stderr]      |
[INFO] [stderr] 1056 |                 b[n] -= num_factor * (&a[n-i] * &b[i]);
[INFO] [stderr]      |                 ---------------------------------^----
[INFO] [stderr]      |                 |                                |
[INFO] [stderr]      |                 |                                immutable borrow occurs here
[INFO] [stderr]      |                 mutable borrow occurs here
[INFO] [stderr]      |                 mutable borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `"docker" "inspect" "99da72b76b7fdf79b0cad44c8d1011ee9913516fa6ea4205694b04f298a87dd4"`
[INFO] running `"docker" "rm" "-f" "99da72b76b7fdf79b0cad44c8d1011ee9913516fa6ea4205694b04f298a87dd4"`
[INFO] [stdout] 99da72b76b7fdf79b0cad44c8d1011ee9913516fa6ea4205694b04f298a87dd4