[INFO] cloning repository https://github.com/Solleter/rust_examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Solleter/rust_examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSolleter%2Frust_examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSolleter%2Frust_examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d5b4bf9e260637f369c4c6de673a697f7e5d521
[INFO] testing Solleter/rust_examples against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSolleter%2Frust_examples" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Solleter/rust_examples on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Solleter/rust_examples
[INFO] finished tweaking git repo https://github.com/Solleter/rust_examples
[INFO] tweaked toml for git repo https://github.com/Solleter/rust_examples written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Solleter/rust_examples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f65fa4e4f72b20a76be0b2189fa1efe64d6612555c745c04db7f3a0cd283252
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0f65fa4e4f72b20a76be0b2189fa1efe64d6612555c745c04db7f3a0cd283252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f65fa4e4f72b20a76be0b2189fa1efe64d6612555c745c04db7f3a0cd283252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f65fa4e4f72b20a76be0b2189fa1efe64d6612555c745c04db7f3a0cd283252", kill_on_drop: false }`
[INFO] [stdout] 0f65fa4e4f72b20a76be0b2189fa1efe64d6612555c745c04db7f3a0cd283252
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a779d2894b6694d3d6e22eff106dcd1d2a1eaf65d3be79feb7b77fcb3e258387
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a779d2894b6694d3d6e22eff106dcd1d2a1eaf65d3be79feb7b77fcb3e258387", kill_on_drop: false }`
[INFO] [stderr]    Compiling r28_function v0.1.0 (/opt/rustwide/workdir/r28_function)
[INFO] [stderr]    Compiling r29_method v0.1.0 (/opt/rustwide/workdir/r29_method)
[INFO] [stderr]    Compiling r18_literal_variable v0.1.0 (/opt/rustwide/workdir/r18_literal_variable)
[INFO] [stderr]    Compiling r02_testlist v0.1.0 (/opt/rustwide/workdir/r02_testlist)
[INFO] [stderr]    Compiling r23_expression v0.1.0 (/opt/rustwide/workdir/r23_expression)
[INFO] [stderr]    Compiling r17_type_convert v0.1.0 (/opt/rustwide/workdir/r17_type_convert)
[INFO] [stderr]    Compiling r16_scope_shadowing v0.1.0 (/opt/rustwide/workdir/r16_scope_shadowing)
[INFO] [stderr]    Compiling r07_array_slice v0.1.0 (/opt/rustwide/workdir/r07_array_slice)
[INFO] [stderr]    Compiling r01_display v0.1.0 (/opt/rustwide/workdir/r01_display)
[INFO] [stderr]    Compiling r05_literal v0.1.0 (/opt/rustwide/workdir/r05_literal)
[INFO] [stderr]    Compiling r15_mut_variable v0.1.0 (/opt/rustwide/workdir/r15_mut_variable)
[INFO] [stderr]    Compiling r08_struct v0.1.0 (/opt/rustwide/workdir/r08_struct)
[INFO] [stderr]    Compiling r24_if_else v0.1.0 (/opt/rustwide/workdir/r24_if_else)
[INFO] [stderr]    Compiling r12_testcase_linklist v0.1.0 (/opt/rustwide/workdir/r12_testcase_linklist)
[INFO] [stderr]    Compiling r41_10_5_files v0.1.0 (/opt/rustwide/workdir/r41_10_5_files)
[INFO] [stderr]    Compiling r47_std_string v0.1.0 (/opt/rustwide/workdir/r47_std_string)
[INFO] [stderr]    Compiling r35_higher_order_function v0.1.0 (/opt/rustwide/workdir/r35_higher_order_function)
[INFO] [stderr]    Compiling r31_capture v0.1.0 (/opt/rustwide/workdir/r31_capture)
[INFO] [stderr]    Compiling r09_enum v0.1.0 (/opt/rustwide/workdir/r09_enum)
[INFO] [stderr]    Compiling r20_alias v0.1.0 (/opt/rustwide/workdir/r20_alias)
[INFO] [stderr]    Compiling r04_datatype v0.1.0 (/opt/rustwide/workdir/r04_datatype)
[INFO] [stderr]    Compiling r25_loop_while_for v0.1.0 (/opt/rustwide/workdir/r25_loop_while_for)
[INFO] [stderr]    Compiling r06_tuple v0.1.0 (/opt/rustwide/workdir/r06_tuple)
[INFO] [stderr]    Compiling r45_std_box v0.1.0 (/opt/rustwide/workdir/r45_std_box)
[INFO] [stderr]    Compiling r57_child_process v0.1.0 (/opt/rustwide/workdir/r57_child_process)
[INFO] [stderr]    Compiling r49_std_result v0.1.0 (/opt/rustwide/workdir/r49_std_result)
[INFO] [stderr]    Compiling r55_path v0.1.0 (/opt/rustwide/workdir/r55_path)
[INFO] [stderr]    Compiling r53_thread_example v0.1.0 (/opt/rustwide/workdir/r53_thread_example)
[INFO] [stderr]    Compiling r54_channel v0.1.0 (/opt/rustwide/workdir/r54_channel)
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]  --> r04_datatype/src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut inferred_type = 12;
[INFO] [stdout]   |             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> r04_datatype/src/lib.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut mutable = 12;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> r04_datatype/src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     mutable = 21;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r03_format v0.1.0 (/opt/rustwide/workdir/r03_format)
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> r25_loop_while_for/src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r52_thread v0.1.0 (/opt/rustwide/workdir/r52_thread)
[INFO] [stderr]    Compiling r34_std v0.1.0 (/opt/rustwide/workdir/r34_std)
[INFO] [stdout] warning: unused variable: `display`
[INFO] [stdout]  --> r55_path/src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let display = path.display();
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r11_enum_cstyle v0.1.0 (/opt/rustwide/workdir/r11_enum_cstyle)
[INFO] [stderr]    Compiling r26_match v0.1.0 (/opt/rustwide/workdir/r26_match)
[INFO] [stderr]    Compiling r10_enum_use v0.1.0 (/opt/rustwide/workdir/r10_enum_use)
[INFO] [stderr]    Compiling r37_10_1_visibility v0.1.0 (/opt/rustwide/workdir/r37_10_1_visibility)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> r26_match/src/lib.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |         13...19 => println!("A teen"),
[INFO] [stdout]   |           ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> r34_std/src/lib.rs:32:47
[INFO] [stdout]    |
[INFO] [stdout] 32 |     println!("Find 2 in array2: {:?}", array2.into_iter().find(|&&x| x == 2));
[INFO] [stdout]    |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[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 #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r19_type_deduce v0.1.0 (/opt/rustwide/workdir/r19_type_deduce)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r40_10_4_super_self v0.1.0 (/opt/rustwide/workdir/r40_10_4_super_self)
[INFO] [stderr]    Compiling r51_hashmap_hashset v0.1.0 (/opt/rustwide/workdir/r51_hashmap_hashset)
[INFO] [stderr]    Compiling r46_std_vector v0.1.0 (/opt/rustwide/workdir/r46_std_vector)
[INFO] [stderr]    Compiling r22_tostring_fromstr v0.1.0 (/opt/rustwide/workdir/r22_tostring_fromstr)
[INFO] [stderr]    Compiling r21_from_to v0.1.0 (/opt/rustwide/workdir/r21_from_to)
[INFO] [stderr]    Compiling r38_10_2_struct_visibility v0.1.0 (/opt/rustwide/workdir/r38_10_2_struct_visibility)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r27_match_operations v0.1.0 (/opt/rustwide/workdir/r27_match_operations)
[INFO] [stderr]    Compiling r33_type_lambda v0.1.0 (/opt/rustwide/workdir/r33_type_lambda)
[INFO] [stderr]    Compiling r13_const v0.1.0 (/opt/rustwide/workdir/r13_const)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> r40_10_4_super_self/src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn function() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r50_std_result2 v0.1.0 (/opt/rustwide/workdir/r50_std_result2)
[INFO] [stderr]    Compiling r48_std_option v0.1.0 (/opt/rustwide/workdir/r48_std_option)
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]  --> r51_hashmap_hashset/src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn call(number: &str) -> &str {
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r36_diverging_function v0.1.0 (/opt/rustwide/workdir/r36_diverging_function)
[INFO] [stderr]    Compiling r39_10_3_use v0.1.0 (/opt/rustwide/workdir/r39_10_3_use)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> r27_match_operations/src/lib.rs:117:15
[INFO] [stdout]     |
[INFO] [stdout] 117 |         n @ 1 ... 12 => println!("I'm a child of age {:?}", n),
[INFO] [stdout]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> r27_match_operations/src/lib.rs:118:16
[INFO] [stdout]     |
[INFO] [stdout] 118 |         n @ 13 ... 19 => println!("I'm a teen of age {:?}", n),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r56_file v0.1.0 (/opt/rustwide/workdir/r56_file)
[INFO] [stderr]    Compiling r14_variable_bind v0.1.0 (/opt/rustwide/workdir/r14_variable_bind)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r32_as_params v0.1.0 (/opt/rustwide/workdir/r32_as_params)
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> r48_std_option/src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let none: Option<i32> = None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r30_closure v0.1.0 (/opt/rustwide/workdir/r30_closure)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> r50_std_result2/src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     op_(1.0, 10.0);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:41:67
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:46:69
[INFO] [stdout]    |
[INFO] [stdout] 46 |         Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:56:65
[INFO] [stdout]    |
[INFO] [stdout] 56 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:62:65
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_file`
[INFO] [stdout]   --> r56_file/src/lib.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn create_file() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file`
[INFO] [stdout]   --> r56_file/src/lib.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling main v0.1.0 (/opt/rustwide/workdir/main)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.68s
[INFO] running `Command { std: "docker" "inspect" "a779d2894b6694d3d6e22eff106dcd1d2a1eaf65d3be79feb7b77fcb3e258387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a779d2894b6694d3d6e22eff106dcd1d2a1eaf65d3be79feb7b77fcb3e258387", kill_on_drop: false }`
[INFO] [stdout] a779d2894b6694d3d6e22eff106dcd1d2a1eaf65d3be79feb7b77fcb3e258387
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc01bc5280b7c46e27f1fcf0258386ed07ad8ede06aff799877187877ef333a4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dc01bc5280b7c46e27f1fcf0258386ed07ad8ede06aff799877187877ef333a4", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `display`
[INFO] [stdout]  --> r55_path/src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let display = path.display();
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> r27_match_operations/src/lib.rs:117:15
[INFO] [stdout]     |
[INFO] [stdout] 117 |         n @ 1 ... 12 => println!("I'm a child of age {:?}", n),
[INFO] [stdout]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> r27_match_operations/src/lib.rs:118:16
[INFO] [stdout]     |
[INFO] [stdout] 118 |         n @ 13 ... 19 => println!("I'm a teen of age {:?}", n),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:41:67
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:46:69
[INFO] [stdout]    |
[INFO] [stdout] 46 |         Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:56:65
[INFO] [stdout]    |
[INFO] [stdout] 56 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:62:65
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_file`
[INFO] [stdout]   --> r56_file/src/lib.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn create_file() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file`
[INFO] [stdout]   --> r56_file/src/lib.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> r40_10_4_super_self/src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn function() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> r26_match/src/lib.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |         13...19 => println!("A teen"),
[INFO] [stdout]   |           ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]  --> r51_hashmap_hashset/src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn call(number: &str) -> &str {
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> r25_loop_while_for/src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]  --> r04_datatype/src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut inferred_type = 12;
[INFO] [stdout]   |             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> r04_datatype/src/lib.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut mutable = 12;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> r04_datatype/src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     mutable = 21;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> r50_std_result2/src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     op_(1.0, 10.0);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> r34_std/src/lib.rs:32:47
[INFO] [stdout]    |
[INFO] [stdout] 32 |     println!("Find 2 in array2: {:?}", array2.into_iter().find(|&&x| x == 2));
[INFO] [stdout]    |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[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 #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> r48_std_option/src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let none: Option<i32> = None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r17_type_convert v0.1.0 (/opt/rustwide/workdir/r17_type_convert)
[INFO] [stderr]    Compiling r46_std_vector v0.1.0 (/opt/rustwide/workdir/r46_std_vector)
[INFO] [stderr]    Compiling r01_display v0.1.0 (/opt/rustwide/workdir/r01_display)
[INFO] [stderr]    Compiling r34_std v0.1.0 (/opt/rustwide/workdir/r34_std)
[INFO] [stderr]    Compiling r57_child_process v0.1.0 (/opt/rustwide/workdir/r57_child_process)
[INFO] [stderr]    Compiling r03_format v0.1.0 (/opt/rustwide/workdir/r03_format)
[INFO] [stderr]    Compiling r24_if_else v0.1.0 (/opt/rustwide/workdir/r24_if_else)
[INFO] [stderr]    Compiling r10_enum_use v0.1.0 (/opt/rustwide/workdir/r10_enum_use)
[INFO] [stderr]    Compiling r52_thread v0.1.0 (/opt/rustwide/workdir/r52_thread)
[INFO] [stderr]    Compiling r16_scope_shadowing v0.1.0 (/opt/rustwide/workdir/r16_scope_shadowing)
[INFO] [stderr]    Compiling r51_hashmap_hashset v0.1.0 (/opt/rustwide/workdir/r51_hashmap_hashset)
[INFO] [stderr]    Compiling r25_loop_while_for v0.1.0 (/opt/rustwide/workdir/r25_loop_while_for)
[INFO] [stderr]    Compiling r29_method v0.1.0 (/opt/rustwide/workdir/r29_method)
[INFO] [stderr]    Compiling r30_closure v0.1.0 (/opt/rustwide/workdir/r30_closure)
[INFO] [stderr]    Compiling r33_type_lambda v0.1.0 (/opt/rustwide/workdir/r33_type_lambda)
[INFO] [stderr]    Compiling r11_enum_cstyle v0.1.0 (/opt/rustwide/workdir/r11_enum_cstyle)
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> r25_loop_while_for/src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]  --> r51_hashmap_hashset/src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn call(number: &str) -> &str {
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> r34_std/src/lib.rs:32:47
[INFO] [stdout]    |
[INFO] [stdout] 32 |     println!("Find 2 in array2: {:?}", array2.into_iter().find(|&&x| x == 2));
[INFO] [stdout]    |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[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 #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r19_type_deduce v0.1.0 (/opt/rustwide/workdir/r19_type_deduce)
[INFO] [stderr]    Compiling r54_channel v0.1.0 (/opt/rustwide/workdir/r54_channel)
[INFO] [stderr]    Compiling r55_path v0.1.0 (/opt/rustwide/workdir/r55_path)
[INFO] [stderr]    Compiling r37_10_1_visibility v0.1.0 (/opt/rustwide/workdir/r37_10_1_visibility)
[INFO] [stderr]    Compiling r13_const v0.1.0 (/opt/rustwide/workdir/r13_const)
[INFO] [stderr]    Compiling r14_variable_bind v0.1.0 (/opt/rustwide/workdir/r14_variable_bind)
[INFO] [stderr]    Compiling r31_capture v0.1.0 (/opt/rustwide/workdir/r31_capture)
[INFO] [stderr]    Compiling r08_struct v0.1.0 (/opt/rustwide/workdir/r08_struct)
[INFO] [stderr]    Compiling r45_std_box v0.1.0 (/opt/rustwide/workdir/r45_std_box)
[INFO] [stderr]    Compiling r02_testlist v0.1.0 (/opt/rustwide/workdir/r02_testlist)
[INFO] [stdout] warning: unused variable: `display`
[INFO] [stdout]  --> r55_path/src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let display = path.display();
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r48_std_option v0.1.0 (/opt/rustwide/workdir/r48_std_option)
[INFO] [stderr]    Compiling r40_10_4_super_self v0.1.0 (/opt/rustwide/workdir/r40_10_4_super_self)
[INFO] [stderr]    Compiling r38_10_2_struct_visibility v0.1.0 (/opt/rustwide/workdir/r38_10_2_struct_visibility)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r32_as_params v0.1.0 (/opt/rustwide/workdir/r32_as_params)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r56_file v0.1.0 (/opt/rustwide/workdir/r56_file)
[INFO] [stderr]    Compiling r18_literal_variable v0.1.0 (/opt/rustwide/workdir/r18_literal_variable)
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> r48_std_option/src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let none: Option<i32> = None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> r40_10_4_super_self/src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn function() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:41:67
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:46:69
[INFO] [stdout]    |
[INFO] [stdout] 46 |         Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:56:65
[INFO] [stdout]    |
[INFO] [stdout] 56 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> r56_file/src/lib.rs:62:65
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_file`
[INFO] [stdout]   --> r56_file/src/lib.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn create_file() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file`
[INFO] [stdout]   --> r56_file/src/lib.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r22_tostring_fromstr v0.1.0 (/opt/rustwide/workdir/r22_tostring_fromstr)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r09_enum v0.1.0 (/opt/rustwide/workdir/r09_enum)
[INFO] [stderr]    Compiling r04_datatype v0.1.0 (/opt/rustwide/workdir/r04_datatype)
[INFO] [stderr]    Compiling r05_literal v0.1.0 (/opt/rustwide/workdir/r05_literal)
[INFO] [stderr]    Compiling r50_std_result2 v0.1.0 (/opt/rustwide/workdir/r50_std_result2)
[INFO] [stderr]    Compiling r41_10_5_files v0.1.0 (/opt/rustwide/workdir/r41_10_5_files)
[INFO] [stderr]    Compiling r23_expression v0.1.0 (/opt/rustwide/workdir/r23_expression)
[INFO] [stderr]    Compiling r07_array_slice v0.1.0 (/opt/rustwide/workdir/r07_array_slice)
[INFO] [stderr]    Compiling r39_10_3_use v0.1.0 (/opt/rustwide/workdir/r39_10_3_use)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r21_from_to v0.1.0 (/opt/rustwide/workdir/r21_from_to)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r36_diverging_function v0.1.0 (/opt/rustwide/workdir/r36_diverging_function)
[INFO] [stderr]    Compiling r20_alias v0.1.0 (/opt/rustwide/workdir/r20_alias)
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]  --> r04_datatype/src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut inferred_type = 12;
[INFO] [stdout]   |             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> r04_datatype/src/lib.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut mutable = 12;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> r04_datatype/src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     mutable = 21;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r15_mut_variable v0.1.0 (/opt/rustwide/workdir/r15_mut_variable)
[INFO] [stderr]    Compiling r47_std_string v0.1.0 (/opt/rustwide/workdir/r47_std_string)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> r50_std_result2/src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     op_(1.0, 10.0);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r06_tuple v0.1.0 (/opt/rustwide/workdir/r06_tuple)
[INFO] [stderr]    Compiling r35_higher_order_function v0.1.0 (/opt/rustwide/workdir/r35_higher_order_function)
[INFO] [stderr]    Compiling r27_match_operations v0.1.0 (/opt/rustwide/workdir/r27_match_operations)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> r27_match_operations/src/lib.rs:117:15
[INFO] [stdout]     |
[INFO] [stdout] 117 |         n @ 1 ... 12 => println!("I'm a child of age {:?}", n),
[INFO] [stdout]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> r27_match_operations/src/lib.rs:118:16
[INFO] [stdout]     |
[INFO] [stdout] 118 |         n @ 13 ... 19 => println!("I'm a teen of age {:?}", n),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r26_match v0.1.0 (/opt/rustwide/workdir/r26_match)
[INFO] [stderr]    Compiling r49_std_result v0.1.0 (/opt/rustwide/workdir/r49_std_result)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> r26_match/src/lib.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |         13...19 => println!("A teen"),
[INFO] [stdout]   |           ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling r12_testcase_linklist v0.1.0 (/opt/rustwide/workdir/r12_testcase_linklist)
[INFO] [stderr]    Compiling r28_function v0.1.0 (/opt/rustwide/workdir/r28_function)
[INFO] [stderr]    Compiling r53_thread_example v0.1.0 (/opt/rustwide/workdir/r53_thread_example)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling main v0.1.0 (/opt/rustwide/workdir/main)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 20.52s
[INFO] running `Command { std: "docker" "inspect" "dc01bc5280b7c46e27f1fcf0258386ed07ad8ede06aff799877187877ef333a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc01bc5280b7c46e27f1fcf0258386ed07ad8ede06aff799877187877ef333a4", kill_on_drop: false }`
[INFO] [stdout] dc01bc5280b7c46e27f1fcf0258386ed07ad8ede06aff799877187877ef333a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0b527ade961538d0bc33eade0f94f8463a370844b62d36145aa571d6b3b471f9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0b527ade961538d0bc33eade0f94f8463a370844b62d36145aa571d6b3b471f9", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `none`
[INFO] [stderr]   --> r48_std_option/src/lib.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let none: Option<i32> = None;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:41:67
[INFO] [stderr]    |
[INFO] [stderr] 41 |         Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                   ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:46:69
[INFO] [stderr]    |
[INFO] [stderr] 46 |         Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:56:65
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:62:65
[INFO] [stderr]    |
[INFO] [stderr] 62 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_file`
[INFO] [stderr]   --> r56_file/src/lib.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn create_file() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_file`
[INFO] [stderr]   --> r56_file/src/lib.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn read_file() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function`
[INFO] [stderr]  --> r40_10_4_super_self/src/lib.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn function() {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> r50_std_result2/src/lib.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     op_(1.0, 10.0);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]  --> r26_match/src/lib.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 |         13...19 => println!("A teen"),
[INFO] [stderr]   |           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]  --> r04_datatype/src/lib.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut inferred_type = 12;
[INFO] [stderr]   |             ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mutable` is assigned to, but never used
[INFO] [stderr]   --> r04_datatype/src/lib.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut mutable = 12;
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> r04_datatype/src/lib.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     mutable = 21;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]   --> r25_loop_while_for/src/lib.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         'inner: loop {
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `display`
[INFO] [stderr]  --> r55_path/src/lib.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let display = path.display();
[INFO] [stderr]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> r27_match_operations/src/lib.rs:117:15
[INFO] [stderr]     |
[INFO] [stderr] 117 |         n @ 1 ... 12 => println!("I'm a child of age {:?}", n),
[INFO] [stderr]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> r27_match_operations/src/lib.rs:118:16
[INFO] [stderr]     |
[INFO] [stderr] 118 |         n @ 13 ... 19 => println!("I'm a teen of age {:?}", n),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `number`
[INFO] [stderr]  --> r51_hashmap_hashset/src/lib.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn call(number: &str) -> &str {
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]   --> r34_std/src/lib.rs:32:47
[INFO] [stderr]    |
[INFO] [stderr] 32 |     println!("Find 2 in array2: {:?}", array2.into_iter().find(|&&x| x == 2));
[INFO] [stderr]    |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]  --> r04_datatype/src/lib.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut inferred_type = 12;
[INFO] [stderr]   |             ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mutable` is assigned to, but never used
[INFO] [stderr]   --> r04_datatype/src/lib.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut mutable = 12;
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> r04_datatype/src/lib.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     mutable = 21;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> r50_std_result2/src/lib.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     op_(1.0, 10.0);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `none`
[INFO] [stderr]   --> r48_std_option/src/lib.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let none: Option<i32> = None;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `display`
[INFO] [stderr]  --> r55_path/src/lib.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let display = path.display();
[INFO] [stderr]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:41:67
[INFO] [stderr]    |
[INFO] [stderr] 41 |         Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                   ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:46:69
[INFO] [stderr]    |
[INFO] [stderr] 46 |         Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:56:65
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> r56_file/src/lib.rs:62:65
[INFO] [stderr]    |
[INFO] [stderr] 62 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_file`
[INFO] [stderr]   --> r56_file/src/lib.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn create_file() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_file`
[INFO] [stderr]   --> r56_file/src/lib.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn read_file() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]   --> r34_std/src/lib.rs:32:47
[INFO] [stderr]    |
[INFO] [stderr] 32 |     println!("Find 2 in array2: {:?}", array2.into_iter().find(|&&x| x == 2));
[INFO] [stderr]    |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `number`
[INFO] [stderr]  --> r51_hashmap_hashset/src/lib.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn call(number: &str) -> &str {
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]  --> r26_match/src/lib.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 |         13...19 => println!("A teen"),
[INFO] [stderr]   |           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]   --> r25_loop_while_for/src/lib.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         'inner: loop {
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function`
[INFO] [stderr]  --> r40_10_4_super_self/src/lib.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn function() {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> r27_match_operations/src/lib.rs:117:15
[INFO] [stderr]     |
[INFO] [stderr] 117 |         n @ 1 ... 12 => println!("I'm a child of age {:?}", n),
[INFO] [stderr]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> r27_match_operations/src/lib.rs:118:16
[INFO] [stderr]     |
[INFO] [stderr] 118 |         n @ 13 ... 19 => println!("I'm a teen of age {:?}", n),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/main-f5decb73d0e50b57)
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[INFO] [stdout] 
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[INFO] [stdout] 
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[INFO] [stdout] 
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[INFO] [stdout] 
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[INFO] [stdout] 
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[INFO] [stdout] 
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[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r15_mut_variable-05e0bd69c7f5014e)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r16_scope_shadowing-f086882e07d0809c)
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[INFO] [stdout] 
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[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
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[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r20_alias-8752af032f0704bd)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r21_from_to-91b50f27aa141b77)
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[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r22_tostring_fromstr-5a93d37976cc3237)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r23_expression-6f99428b31a9a9ab)
[INFO] [stdout] 
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[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r24_if_else-bb9c0a830e08ac23)
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[INFO] [stdout] 
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[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
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[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r26_match-3bea15768972e4f6)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r27_match_operations-76099a853e290b2f)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r28_function-bc7340b42d1c6777)
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[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r29_method-263a00b32281320e)
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[INFO] [stdout] 
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[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r49_std_result-2e453b4921a84303)
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[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r50_std_result2-00f0e0b15a0e3d58)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r51_hashmap_hashset-fff809eb3ade45ba)
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[INFO] [stdout] 
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[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r52_thread-fce729cd4917a71d)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r53_thread_example-8af3ca4563fd28f5)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r54_channel-3d7bccbbd5196765)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r55_path-8555ce5517eebf21)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r56_file-16baef9058cd5b9e)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r57_child_process-ece2a3d4c2fc6f71)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    Doc-tests r24_if_else
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r18_literal_variable
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r57_child_process
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r30_closure
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r03_format
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r27_match_operations
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> /opt/rustwide/workdir/r27_match_operations/src/lib.rs:117:15
[INFO] [stderr]     |
[INFO] [stderr] 117 |         n @ 1 ... 12 => println!("I'm a child of age {:?}", n),
[INFO] [stderr]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> /opt/rustwide/workdir/r27_match_operations/src/lib.rs:118:16
[INFO] [stderr]     |
[INFO] [stderr] 118 |         n @ 13 ... 19 => println!("I'm a teen of age {:?}", n),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r45_std_box
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r29_method
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r55_path
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stderr]    Doc-tests r11_enum_cstyle
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[INFO] [stderr]    Doc-tests r17_type_convert
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[INFO] [stderr]    Doc-tests r46_std_vector
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[INFO] [stderr]    Doc-tests r01_display
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[INFO] [stderr]    Doc-tests r47_std_string
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[INFO] [stderr]    Doc-tests r37_10_1_visibility
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r14_variable_bind
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[INFO] [stderr]    Doc-tests r16_scope_shadowing
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[INFO] [stderr]    Doc-tests r10_enum_use
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[INFO] [stderr]    Doc-tests r05_literal
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[INFO] [stderr]    Doc-tests r20_alias
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[INFO] [stderr]    Doc-tests r32_as_params
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[INFO] [stderr]    Doc-tests r33_type_lambda
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[INFO] [stderr]    Doc-tests r19_type_deduce
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[INFO] [stderr]    Doc-tests r39_10_3_use
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[INFO] [stderr]    Doc-tests r48_std_option
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[INFO] [stderr]    Doc-tests r25_loop_while_for
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[INFO] [stderr]    Doc-tests r21_from_to
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[INFO] [stderr]    Doc-tests r54_channel
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[INFO] [stderr]    Doc-tests r04_datatype
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[INFO] [stderr]    Doc-tests r02_testlist
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[INFO] [stderr]    Doc-tests r50_std_result2
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[INFO] [stderr]    Doc-tests r09_enum
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[INFO] [stderr]    Doc-tests r41_10_5_files
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests r31_capture
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[INFO] [stderr]    Doc-tests r07_array_slice
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[INFO] [stderr]    Doc-tests r06_tuple
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[INFO] [stderr]    Doc-tests r28_function
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[INFO] [stderr]    Doc-tests r08_struct
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[INFO] [stderr]    Doc-tests r52_thread
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[INFO] [stderr]    Doc-tests r51_hashmap_hashset
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[INFO] [stderr]    Doc-tests r12_testcase_linklist
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[INFO] [stderr]    Doc-tests r23_expression
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[INFO] [stderr]    Doc-tests r40_10_4_super_self
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[INFO] [stderr]    Doc-tests r26_match
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]  --> /opt/rustwide/workdir/r26_match/src/lib.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 |         13...19 => println!("A teen"),
[INFO] [stderr]   |           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
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[INFO] running `Command { std: "docker" "inspect" "0b527ade961538d0bc33eade0f94f8463a370844b62d36145aa571d6b3b471f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b527ade961538d0bc33eade0f94f8463a370844b62d36145aa571d6b3b471f9", kill_on_drop: false }`
[INFO] [stdout] 0b527ade961538d0bc33eade0f94f8463a370844b62d36145aa571d6b3b471f9