[INFO] cloning repository https://github.com/hegde-atri/rust_practice [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hegde-atri/rust_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegde-atri%2Frust_practice", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegde-atri%2Frust_practice'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] db9291cba66d96216e22386e399989cf6c036636 [INFO] building hegde-atri/rust_practice against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegde-atri%2Frust_practice" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hegde-atri/rust_practice on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hegde-atri/rust_practice [INFO] finished tweaking git repo https://github.com/hegde-atri/rust_practice [INFO] tweaked toml for git repo https://github.com/hegde-atri/rust_practice written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/hegde-atri/rust_practice 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0b663eab682278c44a80bda17e71fd02c7f381625ee4f976fd34a00f05680537 [INFO] running `Command { std: "docker" "start" "-a" "0b663eab682278c44a80bda17e71fd02c7f381625ee4f976fd34a00f05680537", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0b663eab682278c44a80bda17e71fd02c7f381625ee4f976fd34a00f05680537", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0b663eab682278c44a80bda17e71fd02c7f381625ee4f976fd34a00f05680537", kill_on_drop: false }` [INFO] [stdout] 0b663eab682278c44a80bda17e71fd02c7f381625ee4f976fd34a00f05680537 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f4a8da2974f1e6bdeb972241c13fde38f84511c09c09190eae11d50954b2b466 [INFO] running `Command { std: "docker" "start" "-a" "f4a8da2974f1e6bdeb972241c13fde38f84511c09c09190eae11d50954b2b466", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Compiling libc v0.2.139 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling ppv-lite86 v0.2.17 [INFO] [stderr] Compiling arrayvec v0.7.2 [INFO] [stderr] Compiling itoa v1.0.5 [INFO] [stderr] Compiling add_two_numbers v0.1.0 (/opt/rustwide/workdir/leetcode/add_two_numbers) [INFO] [stderr] Compiling atoi v0.1.0 (/opt/rustwide/workdir/leetcode/atoi) [INFO] [stderr] Compiling palindrome_number v0.1.0 (/opt/rustwide/workdir/leetcode/palindrome_number) [INFO] [stderr] Compiling jug_search_com1005 v0.1.0 (/opt/rustwide/workdir/general/jug_search_com1005) [INFO] [stderr] Compiling longest_unique_substring v0.1.0 (/opt/rustwide/workdir/leetcode/longest_unique_substring) [INFO] [stderr] Compiling longest_common_prefix v0.1.0 (/opt/rustwide/workdir/leetcode/longest_common_prefix) [INFO] [stderr] Compiling pow v0.1.0 (/opt/rustwide/workdir/leetcode/pow) [INFO] [stderr] Compiling container_with_most_water v0.1.0 (/opt/rustwide/workdir/leetcode/container_with_most_water) [INFO] [stderr] Compiling two_sum v0.1.0 (/opt/rustwide/workdir/leetcode/two_sum) [INFO] [stderr] Compiling median_two_sorted_arrays v0.1.0 (/opt/rustwide/workdir/leetcode/median_two_sorted_arrays) [INFO] [stderr] Compiling merge_two_sorted_lists_22 v0.1.0 (/opt/rustwide/workdir/leetcode/merge_two_sorted_lists_22) [INFO] [stderr] Compiling generate_parentheses_22 v0.1.0 (/opt/rustwide/workdir/leetcode/generate_parentheses_22) [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> leetcode/merge_two_sorted_lists_22/src/main.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl ListNode { [INFO] [stdout] | ------------- associated function in this implementation [INFO] [stdout] 10 | #[inline] [INFO] [stdout] 11 | fn new(val: i32) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling reverse_integer v0.1.0 (/opt/rustwide/workdir/leetcode/reverse_integer) [INFO] [stderr] Compiling valid_parentheses v0.1.0 (/opt/rustwide/workdir/leetcode/valid_parentheses) [INFO] [stderr] Compiling sorting v0.1.0 (/opt/rustwide/workdir/general/sorting) [INFO] [stderr] Compiling merge_k_sorted_lists_23 v0.1.0 (/opt/rustwide/workdir/leetcode/merge_k_sorted_lists_23) [INFO] [stdout] warning: unused variable: `least` [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:19:17 [INFO] [stdout] | [INFO] [stdout] 19 | let mut least: i32; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_least` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `lists` [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:18:26 [INFO] [stdout] | [INFO] [stdout] 18 | pub fn merge_k_lists(lists: Vec>>) -> Option> { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_lists` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl ListNode { [INFO] [stdout] | ------------- associated function in this implementation [INFO] [stdout] 10 | #[inline] [INFO] [stdout] 11 | fn new(val: i32) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `helper` is never used [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:21:12 [INFO] [stdout] | [INFO] [stdout] 21 | fn helper() -> Option> { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling num-format v0.4.4 [INFO] [stderr] Compiling getrandom v0.2.8 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling calculate_pi v0.1.0 (/opt/rustwide/workdir/general/calculate_pi) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.46s [INFO] running `Command { std: "docker" "inspect" "f4a8da2974f1e6bdeb972241c13fde38f84511c09c09190eae11d50954b2b466", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4a8da2974f1e6bdeb972241c13fde38f84511c09c09190eae11d50954b2b466", kill_on_drop: false }` [INFO] [stdout] f4a8da2974f1e6bdeb972241c13fde38f84511c09c09190eae11d50954b2b466 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] bb2b8bc0b383d7ab7aa9d1c5bebd79ce9ebf81c4312af3737a40edf7bfc0fa36 [INFO] running `Command { std: "docker" "start" "-a" "bb2b8bc0b383d7ab7aa9d1c5bebd79ce9ebf81c4312af3737a40edf7bfc0fa36", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Compiling valid_parentheses v0.1.0 (/opt/rustwide/workdir/leetcode/valid_parentheses) [INFO] [stderr] Compiling longest_common_prefix v0.1.0 (/opt/rustwide/workdir/leetcode/longest_common_prefix) [INFO] [stderr] Compiling merge_two_sorted_lists_22 v0.1.0 (/opt/rustwide/workdir/leetcode/merge_two_sorted_lists_22) [INFO] [stderr] Compiling add_two_numbers v0.1.0 (/opt/rustwide/workdir/leetcode/add_two_numbers) [INFO] [stderr] Compiling container_with_most_water v0.1.0 (/opt/rustwide/workdir/leetcode/container_with_most_water) [INFO] [stderr] Compiling atoi v0.1.0 (/opt/rustwide/workdir/leetcode/atoi) [INFO] [stderr] Compiling generate_parentheses_22 v0.1.0 (/opt/rustwide/workdir/leetcode/generate_parentheses_22) [INFO] [stderr] Compiling merge_k_sorted_lists_23 v0.1.0 (/opt/rustwide/workdir/leetcode/merge_k_sorted_lists_23) [INFO] [stderr] Compiling two_sum v0.1.0 (/opt/rustwide/workdir/leetcode/two_sum) [INFO] [stderr] Compiling sorting v0.1.0 (/opt/rustwide/workdir/general/sorting) [INFO] [stderr] Compiling longest_unique_substring v0.1.0 (/opt/rustwide/workdir/leetcode/longest_unique_substring) [INFO] [stderr] Compiling palindrome_number v0.1.0 (/opt/rustwide/workdir/leetcode/palindrome_number) [INFO] [stderr] Compiling jug_search_com1005 v0.1.0 (/opt/rustwide/workdir/general/jug_search_com1005) [INFO] [stderr] Compiling median_two_sorted_arrays v0.1.0 (/opt/rustwide/workdir/leetcode/median_two_sorted_arrays) [INFO] [stderr] Compiling reverse_integer v0.1.0 (/opt/rustwide/workdir/leetcode/reverse_integer) [INFO] [stderr] Compiling calculate_pi v0.1.0 (/opt/rustwide/workdir/general/calculate_pi) [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> leetcode/merge_two_sorted_lists_22/src/main.rs:49:9 [INFO] [stdout] | [INFO] [stdout] 49 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> leetcode/merge_two_sorted_lists_22/src/main.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl ListNode { [INFO] [stdout] | ------------- associated function in this implementation [INFO] [stdout] 10 | #[inline] [INFO] [stdout] 11 | fn new(val: i32) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:33:9 [INFO] [stdout] | [INFO] [stdout] 33 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `least` [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:19:17 [INFO] [stdout] | [INFO] [stdout] 19 | let mut least: i32; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_least` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `lists` [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:18:26 [INFO] [stdout] | [INFO] [stdout] 18 | pub fn merge_k_lists(lists: Vec>>) -> Option> { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_lists` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl ListNode { [INFO] [stdout] | ------------- associated function in this implementation [INFO] [stdout] 10 | #[inline] [INFO] [stdout] 11 | fn new(val: i32) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `helper` is never used [INFO] [stdout] --> leetcode/merge_k_sorted_lists_23/src/main.rs:21:12 [INFO] [stdout] | [INFO] [stdout] 21 | fn helper() -> Option> { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling pow v0.1.0 (/opt/rustwide/workdir/leetcode/pow) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s [INFO] running `Command { std: "docker" "inspect" "bb2b8bc0b383d7ab7aa9d1c5bebd79ce9ebf81c4312af3737a40edf7bfc0fa36", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bb2b8bc0b383d7ab7aa9d1c5bebd79ce9ebf81c4312af3737a40edf7bfc0fa36", kill_on_drop: false }` [INFO] [stdout] bb2b8bc0b383d7ab7aa9d1c5bebd79ce9ebf81c4312af3737a40edf7bfc0fa36