[INFO] fetching crate rdx 0.0.7...
[INFO] checking rdx-0.0.7 against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] extracting crate rdx 0.0.7 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate rdx 0.0.7
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rdx 0.0.7
[INFO] tweaked toml for crates.io crate rdx 0.0.7 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rdx 0.0.7 on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 78 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.8.2)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.10.1)
[INFO] [stderr]       Adding rand_xoshiro v0.4.0 (available: v0.8.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_xoshiro v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5554fb433cf857c480f81abfc44b5dfc596cb36742b6dd829b8fda191d25b69
[INFO] running `Command { std: "docker" "start" "-a" "f5554fb433cf857c480f81abfc44b5dfc596cb36742b6dd829b8fda191d25b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5554fb433cf857c480f81abfc44b5dfc596cb36742b6dd829b8fda191d25b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5554fb433cf857c480f81abfc44b5dfc596cb36742b6dd829b8fda191d25b69", kill_on_drop: false }`
[INFO] [stdout] f5554fb433cf857c480f81abfc44b5dfc596cb36742b6dd829b8fda191d25b69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc4d819866415ede5dd7bcfcd5ea310f2b58ac5887c2f8c2dc6abbfdb8742d01
[INFO] running `Command { std: "docker" "start" "-a" "bc4d819866415ede5dd7bcfcd5ea310f2b58ac5887c2f8c2dc6abbfdb8742d01", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking csv-core v0.1.13
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking serde_json v1.0.150
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rdx v0.0.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking csv v1.4.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
[INFO] [stdout]  --> benches/benches.rs:6:39
[INFO] [stdout]   |
[INFO] [stdout] 6 | use criterion::{black_box, Criterion, ParameterizedBenchmark, Throughput};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
[INFO] [stdout]   --> benches/benches.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         ParameterizedBenchmark::new(
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
[INFO] [stdout]   --> benches/benches.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         ParameterizedBenchmark::new(
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `criterion::Criterion::<M>::bench`: Please use BenchmarkGroups instead.
[INFO] [stdout]   --> benches/benches.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 |     c.bench(
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `criterion::Criterion::<M>::bench`: Please use BenchmarkGroups instead.
[INFO] [stdout]   --> benches/benches.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 |     c.bench(
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:557:41
[INFO] [stdout]     |
[INFO] [stdout] 557 |         ska_byte_sort(&mut [], |_: &u8| panic!("Bad!"))
[INFO] [stdout]     |                                         ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout]     = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:720:17
[INFO] [stdout]     |
[INFO] [stdout] 720 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:735:17
[INFO] [stdout]     |
[INFO] [stdout] 735 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:750:17
[INFO] [stdout]     |
[INFO] [stdout] 750 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:765:17
[INFO] [stdout]     |
[INFO] [stdout] 765 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:780:17
[INFO] [stdout]     |
[INFO] [stdout] 780 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:795:17
[INFO] [stdout]     |
[INFO] [stdout] 795 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:810:17
[INFO] [stdout]     |
[INFO] [stdout] 810 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:825:17
[INFO] [stdout]     |
[INFO] [stdout] 825 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:840:17
[INFO] [stdout]     |
[INFO] [stdout] 840 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/ska_sort.rs:855:17
[INFO] [stdout]     |
[INFO] [stdout] 855 |                 panic!("Difference: list[{}] = {} != sorted[{}] = {}", i, l, i, s)
[INFO] [stdout]     |                 ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/ska_sort.rs:539:9
[INFO] [stdout]     |
[INFO] [stdout] 539 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/american_flag_sort.rs:131:51
[INFO] [stdout]     |
[INFO] [stdout] 131 |         american_flag_byte_sort(&mut [], |_: &u8| panic!("Bad!"))
[INFO] [stdout]     |                                                   ^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/american_flag_sort.rs:97:9
[INFO] [stdout]     |
[INFO] [stdout]  97 |     use std::prelude::v1::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/507271bc119683008ec719ecee48814e8ac86c65/library/core/src/prelude/mod.rs:31:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.44s
[INFO] running `Command { std: "docker" "inspect" "bc4d819866415ede5dd7bcfcd5ea310f2b58ac5887c2f8c2dc6abbfdb8742d01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc4d819866415ede5dd7bcfcd5ea310f2b58ac5887c2f8c2dc6abbfdb8742d01", kill_on_drop: false }`
[INFO] [stdout] bc4d819866415ede5dd7bcfcd5ea310f2b58ac5887c2f8c2dc6abbfdb8742d01
