[INFO] cloning repository https://github.com/marvinang/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marvinang/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarvinang%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarvinang%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d48e5edda3bca06d7f85ba8cc1ee09acdaded2c6
[INFO] checking marvinang/learn_rust against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarvinang%2Flearn_rust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marvinang/learn_rust on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/marvinang/learn_rust
[INFO] finished tweaking git repo https://github.com/marvinang/learn_rust
[INFO] tweaked toml for git repo https://github.com/marvinang/learn_rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/marvinang/learn_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79ddf5d815c48305e3efb9c5051c54e024ffbdabb60eb3c3abf11d21481fd486
[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" "79ddf5d815c48305e3efb9c5051c54e024ffbdabb60eb3c3abf11d21481fd486", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79ddf5d815c48305e3efb9c5051c54e024ffbdabb60eb3c3abf11d21481fd486", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79ddf5d815c48305e3efb9c5051c54e024ffbdabb60eb3c3abf11d21481fd486", kill_on_drop: false }`
[INFO] [stdout] 79ddf5d815c48305e3efb9c5051c54e024ffbdabb60eb3c3abf11d21481fd486
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7db55860b5a7cb46a8160f5a74d5418d7b2d545b04607a76784f15a891855e47
[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" "7db55860b5a7cb46a8160f5a74d5418d7b2d545b04607a76784f15a891855e47", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking a11_tests v0.1.0 (/tmp/fixit/a11_tests)
[INFO] [stderr]     Checking a12_command_line v0.1.0 (/tmp/fixit/a12_command_line)
[INFO] [stderr]     Checking a20_webserver v0.1.0 (/tmp/fixit/a20_webserver)
[INFO] [stderr]     Checking a21_appendix v0.1.0 (/tmp/fixit/a21_appendix)
[INFO] [stderr]     Checking a5_structs v0.1.0 (/tmp/fixit/a5_structs)
[INFO] [stderr]     Checking a13_functional v0.1.0 (/tmp/fixit/a13_functional)
[INFO] [stderr]     Checking a9_error v0.1.0 (/tmp/fixit/a9_error)
[INFO] [stderr]     Checking a4_ownership v0.1.0 (/tmp/fixit/a4_ownership)
[INFO] [stderr]     Checking a6_enums_match v0.1.0 (/tmp/fixit/a6_enums_match)
[INFO] [stderr]     Checking a8_common_collections v0.1.0 (/tmp/fixit/a8_common_collections)
[INFO] [stderr]     Checking a19_advaced_features v0.1.0 (/tmp/fixit/a19_advaced_features)
[INFO] [stderr]     Checking a14_cargo_crates v0.1.0 (/tmp/fixit/a14_cargo_crates)
[INFO] [stderr]    Migrating a11_tests/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a21_appendix/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a20_webserver/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a12_command_line/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a9_error/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a13_functional/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a5_structs/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a19_advaced_features/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a4_ownership/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a8_common_collections/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a14_cargo_crates/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a6_enums_match/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking a16_concurrency v0.1.0 (/tmp/fixit/a16_concurrency)
[INFO] [stderr]    Migrating a16_concurrency/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking a3_common_concepts v0.1.0 (/tmp/fixit/a3_common_concepts)
[INFO] [stderr]    Migrating a3_common_concepts/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking a10_generic_traits_lifetime v0.1.0 (/tmp/fixit/a10_generic_traits_lifetime)
[INFO] [stderr]    Migrating a10_generic_traits_lifetime/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking a1_started v0.1.0 (/tmp/fixit/a1_started)
[INFO] [stderr]    Migrating a1_started/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: struct is never constructed: `Like`
[INFO] [stdout]    --> a5_structs/main.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct Like {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]    --> a5_structs/main.rs:168:8
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn test(self, s :&str) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `UnitStruct`
[INFO] [stdout]    --> a5_structs/main.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 | struct UnitStruct;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_Rectangle` should have a snake case name
[INFO] [stdout]    --> a5_structs/main.rs:190:4
[INFO] [stdout]     |
[INFO] [stdout] 190 | fn create_Rectangle() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `create_rectangle`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a9_error/src/main.rs (5 fixes)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> a9_error/src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     panic!("error occured");
[INFO] [stdout]    |     ------------------------ any code following this expression is unreachable
[INFO] [stdout] 43 |     println!("Hello, Rust");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `panic_error`
[INFO] [stdout]   --> a9_error/src/main.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn panic_error() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_file`
[INFO] [stdout]   --> a9_error/src/main.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn deal_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_error_kind`
[INFO] [stdout]   --> a9_error/src/main.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn match_error_kind() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_error_closure`
[INFO] [stdout]   --> a9_error/src/main.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn match_error_closure() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_file_2`
[INFO] [stdout]    --> a9_error/src/main.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn deal_file_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_file_error`
[INFO] [stdout]    --> a9_error/src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn deal_file_error() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deliver_error`
[INFO] [stdout]    --> a9_error/src/main.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn deliver_error(i: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `f`
[INFO] [stdout]    --> a9_error/src/main.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn f(i: i32) -> Result<i32, bool> {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `g1`
[INFO] [stdout]    --> a9_error/src/main.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn g1(i: i32) -> Result<i32, bool> {
[INFO] [stdout]     |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `g`
[INFO] [stdout]    --> a9_error/src/main.rs:163:4
[INFO] [stdout]     |
[INFO] [stdout] 163 | fn g(i: i32) -> Result<i32, bool> {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]    --> a9_error/src/main.rs:171:4
[INFO] [stdout]     |
[INFO] [stdout] 171 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file_short`
[INFO] [stdout]    --> a9_error/src/main.rs:185:4
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn read_username_from_file_short() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_text_from_file`
[INFO] [stdout]    --> a9_error/src/main.rs:206:4
[INFO] [stdout]     |
[INFO] [stdout] 206 | fn read_text_from_file(path: &str) -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_good`
[INFO] [stdout]    --> a9_error/src/main.rs:213:4
[INFO] [stdout]     |
[INFO] [stdout] 213 | fn deal_good() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking a15_pointers v0.1.0 (/tmp/fixit/a15_pointers)
[INFO] [stderr]    Migrating a15_pointers/src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]   --> a13_functional/src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `Iterator_count_std` should have a snake case name
[INFO] [stdout]    --> a13_functional/src/main.rs:330:4
[INFO] [stdout]     |
[INFO] [stdout] 330 | fn Iterator_count_std() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `iterator_count_std`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a4_ownership/main.rs (13 fixes)
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking a17_oop v0.1.0 (/tmp/fixit/a17_oop)
[INFO] [stderr]    Migrating a17_oop/src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: value assigned to `s2` is never read
[INFO] [stdout]    --> a4_ownership/main.rs:301:13
[INFO] [stdout]     |
[INFO] [stdout] 301 |     let mut s2 = &s1;
[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: function is never used: `scope`
[INFO] [stdout]   --> a4_ownership/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn scope() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cannot_change`
[INFO] [stdout]    --> a4_ownership/main.rs:230:4
[INFO] [stdout]     |
[INFO] [stdout] 230 | fn cannot_change(_s: &String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]   --> a13_functional/src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `Iterator_count_std` should have a snake case name
[INFO] [stdout]    --> a13_functional/src/main.rs:330:4
[INFO] [stdout]     |
[INFO] [stdout] 330 | fn Iterator_count_std() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `iterator_count_std`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking a18_patterns_matching v0.1.0 (/tmp/fixit/a18_patterns_matching)
[INFO] [stderr]    Migrating a18_patterns_matching/src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed a6_enums_match/main.rs (2 fixes)
[INFO] [stdout] warning: struct is never constructed: `Ipv4Addr`
[INFO] [stdout]   --> a6_enums_match/main.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     struct Ipv4Addr {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Ipv6Addr`
[INFO] [stdout]   --> a6_enums_match/main.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     struct Ipv6Addr {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IP`
[INFO] [stdout]   --> a6_enums_match/main.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 |     enum IP {
[INFO] [stdout]    |          ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `other`
[INFO] [stdout]   --> a6_enums_match/main.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn other() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `index`
[INFO] [stdout]   --> a6_enums_match/main.rs:81:18
[INFO] [stdout]    |
[INFO] [stdout] 81 |         Papery { index: u32 },
[INFO] [stdout]    |                  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Electronic`
[INFO] [stdout]   --> a6_enums_match/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         Electronic { url: String },
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> a6_enums_match/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     Quit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> a6_enums_match/main.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Move { x: i32, y: i32 }, // anonymous struct
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> a6_enums_match/main.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]    --> a6_enums_match/main.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     Penny,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]    --> a6_enums_match/main.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]    --> a6_enums_match/main.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]    --> a6_enums_match/main.rs:126:5
[INFO] [stdout]     |
[INFO] [stdout] 126 |     Alabama,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:333:8
[INFO] [stdout]     |
[INFO] [stdout] 333 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Ref`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:362:8
[INFO] [stdout]     |
[INFO] [stdout] 362 | struct Ref<'a, T: 'a>(&'a T);
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `StaticRef`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:366:8
[INFO] [stdout]     |
[INFO] [stdout] 366 | struct StaticRef<T: 'static>(&'static T);
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `diameter`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:373:5
[INFO] [stdout]     |
[INFO] [stdout] 373 |     diameter: &'a i32,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `foo`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:400:4
[INFO] [stdout]     |
[INFO] [stdout] 400 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `foo_new`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:404:4
[INFO] [stdout]     |
[INFO] [stdout] 404 | fn foo_new(string: &str) -> StrWrap<'_> {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Thunk`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:687:1
[INFO] [stdout]     |
[INFO] [stdout] 687 | type Thunk = Box<dyn Fn() + Send + 'static>;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bar`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:705:4
[INFO] [stdout]     |
[INFO] [stdout] 705 | fn bar() -> ! {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_return`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:710:4
[INFO] [stdout]     |
[INFO] [stdout] 710 | fn no_return(guess: String) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loop_value`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:741:4
[INFO] [stdout]     |
[INFO] [stdout] 741 | fn loop_value() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dst`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:760:4
[INFO] [stdout]     |
[INFO] [stdout] 760 | fn dst() {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generic`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:790:4
[INFO] [stdout]     |
[INFO] [stdout] 790 | fn generic<T: Sized>(t: T) {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generic_1`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:796:4
[INFO] [stdout]     |
[INFO] [stdout] 796 | fn generic_1<T: ?Sized>(t: &T) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:857:5
[INFO] [stdout]     |
[INFO] [stdout] 857 |     Stop,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_closure`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:880:4
[INFO] [stdout]     |
[INFO] [stdout] 880 | fn return_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `macro_rules`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:921:4
[INFO] [stdout]     |
[INFO] [stdout] 921 | fn macro_rules() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_Ball` should have a snake case name
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:390:4
[INFO] [stdout]     |
[INFO] [stdout] 390 | fn new_Ball() {
[INFO] [stdout]     |    ^^^^^^^^ help: convert the identifier to snake case: `new_ball`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a14_cargo_crates/src/main.rs (2 fixes)
[INFO] [stdout] warning: function is never used: `channel_ownership`
[INFO] [stdout]    --> a16_concurrency/src/main.rs:184:4
[INFO] [stdout]     |
[INFO] [stdout] 184 | fn channel_ownership() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a8_common_collections/src/main.rs (23 fixes)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a3_common_concepts/main.rs (20 fixes)
[INFO] [stderr]        Fixed a10_generic_traits_lifetime/src/main.rs (1 fix)
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]   --> a3_common_concepts/main.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let mut a = 123;
[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: constant is never used: `MAX_POINT`
[INFO] [stdout]    --> a3_common_concepts/main.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 |     const MAX_POINT: u32 = 1000_1000;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     y: T,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point1`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Point1<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Option`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:48:6
[INFO] [stdout]    |
[INFO] [stdout] 48 | enum Option<T> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Result`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum Result<T, E> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `distance_from_orgin`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn distance_from_orgin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Data`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Data<T, U> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mixup`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn mixup<V, W>(self, other: Data<V, W>) -> Data<T, W> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `output`
[INFO] [stdout]    --> a10_generic_traits_lifetime/src/main.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn output(object: impl Descriptive) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `channel_ownership`
[INFO] [stdout]    --> a16_concurrency/src/main.rs:184:4
[INFO] [stdout]     |
[INFO] [stdout] 184 | fn channel_ownership() {
[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: field is never read: `y`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     y: T,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point1`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Point1<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Option`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:48:6
[INFO] [stdout]    |
[INFO] [stdout] 48 | enum Option<T> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Result`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum Result<T, E> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `distance_from_orgin`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn distance_from_orgin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Data`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Data<T, U> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mixup`
[INFO] [stdout]   --> a10_generic_traits_lifetime/src/main.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn mixup<V, W>(self, other: Data<V, W>) -> Data<T, W> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `output`
[INFO] [stdout]    --> a10_generic_traits_lifetime/src/main.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn output(object: impl Descriptive) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a17_oop/src/blog.rs (1 fix)
[INFO] [stderr]        Fixed a15_pointers/src/main.rs (8 fixes)
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]    --> a17_oop/src/main.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 167 |     pub struct Screen<T: Draw> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]    --> a17_oop/src/main.rs:175:16
[INFO] [stdout]     |
[INFO] [stdout] 175 |         pub fn run(&self) {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]    --> a17_oop/src/main.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub struct Screen {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `List_Rc` should have an upper camel case name
[INFO] [stdout]    --> a15_pointers/src/main.rs:292:6
[INFO] [stdout]     |
[INFO] [stdout] 292 | enum List_Rc {
[INFO] [stdout]     |      ^^^^^^^ help: convert the identifier to upper camel case: `ListRc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating a11_tests/tests/integration_test.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating a11_tests/src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: function is never used: `immutable`
[INFO] [stdout]    --> a15_pointers/src/main.rs:368:4
[INFO] [stdout]     |
[INFO] [stdout] 368 | fn immutable() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tree`
[INFO] [stdout]    --> a15_pointers/src/main.rs:639:12
[INFO] [stdout]     |
[INFO] [stdout] 639 |     pub fn tree() {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> a9_error/src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     panic!("error occured");
[INFO] [stdout]    |     ------------------------ any code following this expression is unreachable
[INFO] [stdout] 43 |     println!("Hello, Rust");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `panic_error`
[INFO] [stdout]   --> a9_error/src/main.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn panic_error() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_file`
[INFO] [stdout]   --> a9_error/src/main.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn deal_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_error_kind`
[INFO] [stdout]   --> a9_error/src/main.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn match_error_kind() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_error_closure`
[INFO] [stdout]   --> a9_error/src/main.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn match_error_closure() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_file_2`
[INFO] [stdout]    --> a9_error/src/main.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn deal_file_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_file_error`
[INFO] [stdout]    --> a9_error/src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn deal_file_error() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deliver_error`
[INFO] [stdout]    --> a9_error/src/main.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn deliver_error(i: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `f`
[INFO] [stdout]    --> a9_error/src/main.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn f(i: i32) -> Result<i32, bool> {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `g1`
[INFO] [stdout]    --> a9_error/src/main.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn g1(i: i32) -> Result<i32, bool> {
[INFO] [stdout]     |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `g`
[INFO] [stdout]    --> a9_error/src/main.rs:163:4
[INFO] [stdout]     |
[INFO] [stdout] 163 | fn g(i: i32) -> Result<i32, bool> {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]    --> a9_error/src/main.rs:171:4
[INFO] [stdout]     |
[INFO] [stdout] 171 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file_short`
[INFO] [stdout]    --> a9_error/src/main.rs:185:4
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn read_username_from_file_short() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_text_from_file`
[INFO] [stdout]    --> a9_error/src/main.rs:206:4
[INFO] [stdout]     |
[INFO] [stdout] 206 | fn read_text_from_file(path: &str) -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deal_good`
[INFO] [stdout]    --> a9_error/src/main.rs:213:4
[INFO] [stdout]     |
[INFO] [stdout] 213 | fn deal_good() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating a12_command_line/src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed a18_patterns_matching/src/main.rs (10 fixes)
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]   --> a3_common_concepts/main.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let mut a = 123;
[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: constant is never used: `MAX_POINT`
[INFO] [stdout]    --> a3_common_concepts/main.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 |     const MAX_POINT: u32 = 1000_1000;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `foo`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:114:4
[INFO] [stdout]     |
[INFO] [stdout] 114 | fn foo(_x: i32) {}
[INFO] [stdout]     |    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_coordinates`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn print_coordinates(&(x, y): &(i32, i32)) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:232:5
[INFO] [stdout]     |
[INFO] [stdout] 232 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:233:5
[INFO] [stdout]     |
[INFO] [stdout] 233 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:234:5
[INFO] [stdout]     |
[INFO] [stdout] 234 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 257 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:258:5
[INFO] [stdout]     |
[INFO] [stdout] 258 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:259:5
[INFO] [stdout]     |
[INFO] [stdout] 259 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:350:5
[INFO] [stdout]     |
[INFO] [stdout] 350 |     y: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `z`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:351:5
[INFO] [stdout]     |
[INFO] [stdout] 351 |     z: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_guard`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:379:4
[INFO] [stdout]     |
[INFO] [stdout] 379 | fn match_guard() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_guard_repair`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:392:4
[INFO] [stdout]     |
[INFO] [stdout] 392 | fn match_guard_repair() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating a20_webserver/src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: function is never used: `foo`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:114:4
[INFO] [stdout]     |
[INFO] [stdout] 114 | fn foo(_x: i32) {}
[INFO] [stdout]     |    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_coordinates`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn print_coordinates(&(x, y): &(i32, i32)) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:232:5
[INFO] [stdout]     |
[INFO] [stdout] 232 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:233:5
[INFO] [stdout]     |
[INFO] [stdout] 233 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:234:5
[INFO] [stdout]     |
[INFO] [stdout] 234 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 257 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:258:5
[INFO] [stdout]     |
[INFO] [stdout] 258 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:259:5
[INFO] [stdout]     |
[INFO] [stdout] 259 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:350:5
[INFO] [stdout]     |
[INFO] [stdout] 350 |     y: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `z`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:351:5
[INFO] [stdout]     |
[INFO] [stdout] 351 |     z: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_guard`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:379:4
[INFO] [stdout]     |
[INFO] [stdout] 379 | fn match_guard() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_guard_repair`
[INFO] [stdout]    --> a18_patterns_matching/src/main.rs:392:4
[INFO] [stdout]     |
[INFO] [stdout] 392 | fn match_guard_repair() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]    --> a17_oop/src/main.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 167 |     pub struct Screen<T: Draw> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]    --> a17_oop/src/main.rs:175:16
[INFO] [stdout]     |
[INFO] [stdout] 175 |         pub fn run(&self) {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]    --> a17_oop/src/main.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub struct Screen {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking learn_rust v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/a11.rs from 2018 edition to 2021
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:333:8
[INFO] [stdout]     |
[INFO] [stdout] 333 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Ref`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:362:8
[INFO] [stdout]     |
[INFO] [stdout] 362 | struct Ref<'a, T: 'a>(&'a T);
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `StaticRef`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:366:8
[INFO] [stdout]     |
[INFO] [stdout] 366 | struct StaticRef<T: 'static>(&'static T);
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `diameter`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:373:5
[INFO] [stdout]     |
[INFO] [stdout] 373 |     diameter: &'a i32,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `foo`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:400:4
[INFO] [stdout]     |
[INFO] [stdout] 400 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `foo_new`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:404:4
[INFO] [stdout]     |
[INFO] [stdout] 404 | fn foo_new(string: &str) -> StrWrap<'_> {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Thunk`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:687:1
[INFO] [stdout]     |
[INFO] [stdout] 687 | type Thunk = Box<dyn Fn() + Send + 'static>;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bar`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:705:4
[INFO] [stdout]     |
[INFO] [stdout] 705 | fn bar() -> ! {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_return`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:710:4
[INFO] [stdout]     |
[INFO] [stdout] 710 | fn no_return(guess: String) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loop_value`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:741:4
[INFO] [stdout]     |
[INFO] [stdout] 741 | fn loop_value() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dst`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:760:4
[INFO] [stdout]     |
[INFO] [stdout] 760 | fn dst() {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generic`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:790:4
[INFO] [stdout]     |
[INFO] [stdout] 790 | fn generic<T: Sized>(t: T) {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generic_1`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:796:4
[INFO] [stdout]     |
[INFO] [stdout] 796 | fn generic_1<T: ?Sized>(t: &T) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:857:5
[INFO] [stdout]     |
[INFO] [stdout] 857 |     Stop,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_closure`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:880:4
[INFO] [stdout]     |
[INFO] [stdout] 880 | fn return_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `macro_rules`
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:921:4
[INFO] [stdout]     |
[INFO] [stdout] 921 | fn macro_rules() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_Ball` should have a snake case name
[INFO] [stdout]    --> a19_advaced_features/src/main.rs:390:4
[INFO] [stdout]     |
[INFO] [stdout] 390 | fn new_Ball() {
[INFO] [stdout]     |    ^^^^^^^^ help: convert the identifier to snake case: `new_ball`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s2` is never read
[INFO] [stdout]    --> a4_ownership/main.rs:301:13
[INFO] [stdout]     |
[INFO] [stdout] 301 |     let mut s2 = &s1;
[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: function is never used: `scope`
[INFO] [stdout]   --> a4_ownership/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn scope() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cannot_change`
[INFO] [stdout]    --> a4_ownership/main.rs:230:4
[INFO] [stdout]     |
[INFO] [stdout] 230 | fn cannot_change(_s: &String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Ipv4Addr`
[INFO] [stdout]   --> a6_enums_match/main.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     struct Ipv4Addr {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Ipv6Addr`
[INFO] [stdout]   --> a6_enums_match/main.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     struct Ipv6Addr {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IP`
[INFO] [stdout]   --> a6_enums_match/main.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 |     enum IP {
[INFO] [stdout]    |          ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `other`
[INFO] [stdout]   --> a6_enums_match/main.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn other() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `index`
[INFO] [stdout]   --> a6_enums_match/main.rs:81:18
[INFO] [stdout]    |
[INFO] [stdout] 81 |         Papery { index: u32 },
[INFO] [stdout]    |                  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Electronic`
[INFO] [stdout]   --> a6_enums_match/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         Electronic { url: String },
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> a6_enums_match/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     Quit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> a6_enums_match/main.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Move { x: i32, y: i32 }, // anonymous struct
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> a6_enums_match/main.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]    --> a6_enums_match/main.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     Penny,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]    --> a6_enums_match/main.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]    --> a6_enums_match/main.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]    --> a6_enums_match/main.rs:126:5
[INFO] [stdout]     |
[INFO] [stdout] 126 |     Alabama,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Like`
[INFO] [stdout]    --> a5_structs/main.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct Like {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]    --> a5_structs/main.rs:168:8
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn test(self, s :&str) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `UnitStruct`
[INFO] [stdout]    --> a5_structs/main.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 | struct UnitStruct;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_Rectangle` should have a snake case name
[INFO] [stdout]    --> a5_structs/main.rs:190:4
[INFO] [stdout]     |
[INFO] [stdout] 190 | fn create_Rectangle() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `create_rectangle`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `List_Rc` should have an upper camel case name
[INFO] [stdout]    --> a15_pointers/src/main.rs:292:6
[INFO] [stdout]     |
[INFO] [stdout] 292 | enum List_Rc {
[INFO] [stdout]     |      ^^^^^^^ help: convert the identifier to upper camel case: `ListRc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `immutable`
[INFO] [stdout]    --> a15_pointers/src/main.rs:368:4
[INFO] [stdout]     |
[INFO] [stdout] 368 | fn immutable() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tree`
[INFO] [stdout]    --> a15_pointers/src/main.rs:639:12
[INFO] [stdout]     |
[INFO] [stdout] 639 |     pub fn tree() {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed a11_tests/src/main.rs (3 fixes)
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Rectangle` in this scope
[INFO] [stdout]   --> a11_tests/src/main.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let larger = Rectangle {
[INFO] [stdout]    |                      ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use crate::Rectangle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Rectangle` in this scope
[INFO] [stdout]   --> a11_tests/src/main.rs:40:23
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let smaller = Rectangle {
[INFO] [stdout]    |                       ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use crate::Rectangle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Rectangle` in this scope
[INFO] [stdout]   --> a11_tests/src/main.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let larger = Rectangle {
[INFO] [stdout]    |                      ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use crate::Rectangle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Rectangle` in this scope
[INFO] [stdout]   --> a11_tests/src/main.rs:53:23
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let smaller = Rectangle {
[INFO] [stdout]    |                       ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use crate::Rectangle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `greeting` in this scope
[INFO] [stdout]   --> a11_tests/src/main.rs:83:22
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let result = greeting("Carol");
[INFO] [stdout]    |                      ^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 82 |     use crate::greeting;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Guess`
[INFO] [stdout]    --> a11_tests/src/main.rs:119:9
[INFO] [stdout]     |
[INFO] [stdout] 119 |         Guess::new(0);
[INFO] [stdout]     |         ^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 117 |     use crate::Guess;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Guess`
[INFO] [stdout]    --> a11_tests/src/main.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         Guess::new(0);
[INFO] [stdout]     |         ^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 117 |     use crate::Guess;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Rectangle`
[INFO] [stdout]   --> a11_tests/src/main.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> a11_tests/src/main.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]   --> a11_tests/src/main.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn add_two(a: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `greeting`
[INFO] [stdout]   --> a11_tests/src/main.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn greeting(name: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> a11_tests/src/main.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     value: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `prints_and_returns_10`
[INFO] [stdout]    --> a11_tests/src/main.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn prints_and_returns_10(a: i32) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]    --> a11_tests/src/main.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |     pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `internal_adder`
[INFO] [stdout]    --> a11_tests/src/main.rs:226:8
[INFO] [stdout]     |
[INFO] [stdout] 226 |     fn internal_adder(a: i32, b: i32) -> i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0425, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `a11_tests` due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "7db55860b5a7cb46a8160f5a74d5418d7b2d545b04607a76784f15a891855e47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db55860b5a7cb46a8160f5a74d5418d7b2d545b04607a76784f15a891855e47", kill_on_drop: false }`
[INFO] [stdout] 7db55860b5a7cb46a8160f5a74d5418d7b2d545b04607a76784f15a891855e47