[INFO] cloning repository https://github.com/hojinahn4234/error_tutorial [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hojinahn4234/error_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Ferror_tutorial", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Ferror_tutorial'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 3e6e18040017a701a99a8d260adcdf4a63fe50f6 [INFO] checking hojinahn4234/error_tutorial against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Ferror_tutorial" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hojinahn4234/error_tutorial on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hojinahn4234/error_tutorial [INFO] finished tweaking git repo https://github.com/hojinahn4234/error_tutorial [INFO] tweaked toml for git repo https://github.com/hojinahn4234/error_tutorial written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/hojinahn4234/error_tutorial already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3bd6e4726fba571584946a869d6e67ee9ab1a21eeb99dd52b7ab14990e4e7b80 [INFO] running `Command { std: "docker" "start" "-a" "3bd6e4726fba571584946a869d6e67ee9ab1a21eeb99dd52b7ab14990e4e7b80", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3bd6e4726fba571584946a869d6e67ee9ab1a21eeb99dd52b7ab14990e4e7b80", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3bd6e4726fba571584946a869d6e67ee9ab1a21eeb99dd52b7ab14990e4e7b80", kill_on_drop: false }` [INFO] [stdout] 3bd6e4726fba571584946a869d6e67ee9ab1a21eeb99dd52b7ab14990e4e7b80 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c4409c027a903e782b83f65008960a982a8ce6d277c6ad5e585eebed60e38612 [INFO] running `Command { std: "docker" "start" "-a" "c4409c027a903e782b83f65008960a982a8ce6d277c6ad5e585eebed60e38612", kill_on_drop: false }` [INFO] [stderr] Checking error_tutorial v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `ErrorKind` and `Error` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | io::{self, Error, ErrorKind, Read}, [INFO] [stdout] | ^^^^^ ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `ErrorKind` and `Error` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | io::{self, Error, ErrorKind, Read}, [INFO] [stdout] | ^^^^^ ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file_result` [INFO] [stdout] --> src/main.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let greeting_file_result = File::open("hello.txt"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file` [INFO] [stdout] --> src/main.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let greeting_file = File::open("hello.txt").unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file_result` [INFO] [stdout] --> src/main.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let greeting_file_result = File::open("hello.txt"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file2` [INFO] [stdout] --> src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let greeting_file2 = [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file` [INFO] [stdout] --> src/main.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let greeting_file = File::open("hello.txt").unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file2` [INFO] [stdout] --> src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let greeting_file2 = [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file1` is never used [INFO] [stdout] --> src/main.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file2` is never used [INFO] [stdout] --> src/main.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/main.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file1` is never used [INFO] [stdout] --> src/main.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file2` is never used [INFO] [stdout] --> src/main.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/main.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s [INFO] running `Command { std: "docker" "inspect" "c4409c027a903e782b83f65008960a982a8ce6d277c6ad5e585eebed60e38612", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c4409c027a903e782b83f65008960a982a8ce6d277c6ad5e585eebed60e38612", kill_on_drop: false }` [INFO] [stdout] c4409c027a903e782b83f65008960a982a8ce6d277c6ad5e585eebed60e38612 [INFO] checking hojinahn4234/error_tutorial against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Ferror_tutorial" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hojinahn4234/error_tutorial on toolchain f9935d29d867449445ee008640ccca1bf1ae0889 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hojinahn4234/error_tutorial [INFO] finished tweaking git repo https://github.com/hojinahn4234/error_tutorial [INFO] tweaked toml for git repo https://github.com/hojinahn4234/error_tutorial written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/hojinahn4234/error_tutorial already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 8216c06256ea6ba968ded5aa6d7685d05745d9c32b4da460d02b86c52a5dd643 [INFO] running `Command { std: "docker" "start" "-a" "8216c06256ea6ba968ded5aa6d7685d05745d9c32b4da460d02b86c52a5dd643", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8216c06256ea6ba968ded5aa6d7685d05745d9c32b4da460d02b86c52a5dd643", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8216c06256ea6ba968ded5aa6d7685d05745d9c32b4da460d02b86c52a5dd643", kill_on_drop: false }` [INFO] [stdout] 8216c06256ea6ba968ded5aa6d7685d05745d9c32b4da460d02b86c52a5dd643 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ff8b5f3ee7d6939ca16a33ded11406d2ae9db07bc4236af03782b02fade8f662 [INFO] running `Command { std: "docker" "start" "-a" "ff8b5f3ee7d6939ca16a33ded11406d2ae9db07bc4236af03782b02fade8f662", kill_on_drop: false }` [INFO] [stderr] Checking error_tutorial v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `ErrorKind` and `Error` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | io::{self, Error, ErrorKind, Read}, [INFO] [stdout] | ^^^^^ ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `ErrorKind` and `Error` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | io::{self, Error, ErrorKind, Read}, [INFO] [stdout] | ^^^^^ ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file_result` [INFO] [stdout] --> src/main.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let greeting_file_result = File::open("hello.txt"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file` [INFO] [stdout] --> src/main.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let greeting_file = File::open("hello.txt").unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file2` [INFO] [stdout] --> src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let greeting_file2 = [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file_result` [INFO] [stdout] --> src/main.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let greeting_file_result = File::open("hello.txt"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file` [INFO] [stdout] --> src/main.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let greeting_file = File::open("hello.txt").unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file2` [INFO] [stdout] --> src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let greeting_file2 = [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file1` is never used [INFO] [stdout] --> src/main.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file2` is never used [INFO] [stdout] --> src/main.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/main.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/main.rs:34:11 [INFO] [stdout] | [INFO] [stdout] 28 | let username_file_result = File::open("hello.txt"); [INFO] [stdout] | -------------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 29 | let mut username_file = match username_file_result { [INFO] [stdout] | ------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 30 | Ok(file) => file, [INFO] [stdout] | ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 31 | Err(e) => return Err(e), [INFO] [stdout] | - these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 34 | match username_file.read_to_string(&mut username) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file1` is never used [INFO] [stdout] --> src/main.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn read_username_from_file1() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file2` is never used [INFO] [stdout] --> src/main.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/main.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/main.rs:34:11 [INFO] [stdout] | [INFO] [stdout] 28 | let username_file_result = File::open("hello.txt"); [INFO] [stdout] | -------------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 29 | let mut username_file = match username_file_result { [INFO] [stdout] | ------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 30 | Ok(file) => file, [INFO] [stdout] | ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 31 | Err(e) => return Err(e), [INFO] [stdout] | - these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 34 | match username_file.read_to_string(&mut username) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `error_tutorial` (bin "error_tutorial") due to 2 previous errors; 7 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `error_tutorial` (bin "error_tutorial" test) due to 2 previous errors; 7 warnings emitted [INFO] running `Command { std: "docker" "inspect" "ff8b5f3ee7d6939ca16a33ded11406d2ae9db07bc4236af03782b02fade8f662", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ff8b5f3ee7d6939ca16a33ded11406d2ae9db07bc4236af03782b02fade8f662", kill_on_drop: false }` [INFO] [stdout] ff8b5f3ee7d6939ca16a33ded11406d2ae9db07bc4236af03782b02fade8f662