[INFO] cloning repository https://github.com/harismuzaffer/rustsnippets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/harismuzaffer/rustsnippets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharismuzaffer%2Frustsnippets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharismuzaffer%2Frustsnippets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7513a6f9afe48d5061edf7bba064de27292f18d
[INFO] checking harismuzaffer/rustsnippets against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharismuzaffer%2Frustsnippets" "/workspace/builds/worker-48/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-48/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/harismuzaffer/rustsnippets 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/harismuzaffer/rustsnippets
[INFO] finished tweaking git repo https://github.com/harismuzaffer/rustsnippets
[INFO] tweaked toml for git repo https://github.com/harismuzaffer/rustsnippets written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] crate git repo https://github.com/harismuzaffer/rustsnippets 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-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] e3f3553264375a203ce911cf6bf034a08576f6bbfc8dd94a091a263caf94c972
[INFO] running `Command { std: "docker" "start" "-a" "e3f3553264375a203ce911cf6bf034a08576f6bbfc8dd94a091a263caf94c972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3f3553264375a203ce911cf6bf034a08576f6bbfc8dd94a091a263caf94c972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3f3553264375a203ce911cf6bf034a08576f6bbfc8dd94a091a263caf94c972", kill_on_drop: false }`
[INFO] [stdout] e3f3553264375a203ce911cf6bf034a08576f6bbfc8dd94a091a263caf94c972
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] cfae93b74a976ddfd65c82e2fe8a1defb163eeb417be9b9cd2343b2f7825089b
[INFO] running `Command { std: "docker" "start" "-a" "cfae93b74a976ddfd65c82e2fe8a1defb163eeb417be9b9cd2343b2f7825089b", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking learningrust v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/closures_iterators.rs (2 fixes)
[INFO] [stderr]        Fixed src/safety_rules.rs (7 fixes)
[INFO] [stderr]        Fixed src/lifetimes.rs (1 fix)
[INFO] [stderr]        Fixed src/vectors.rs (3 fixes)
[INFO] [stderr]        Fixed src/strings.rs (2 fixes)
[INFO] [stderr]        Fixed src/stack_vs_heap.rs (2 fixes)
[INFO] [stderr]        Fixed src/expressions.rs (6 fixes)
[INFO] [stderr]        Fixed src/datatypes.rs (3 fixes)
[INFO] [stderr]        Fixed src/error_handling.rs (6 fixes)
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/enums.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     x = get_location(myipadd);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]  --> src/lifetimes.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let r;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_r` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]  --> src/lifetimes.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         r = &s;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `part`
[INFO] [stdout]   --> src/lifetimes.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         part: &'a str,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `calculation`
[INFO] [stdout]   --> src/closures_iterators.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         calculation: T,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         value: Option<u32>
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/enums.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     x = get_location(myipadd);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]  --> src/lifetimes.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let r;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_r` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]  --> src/lifetimes.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         r = &s;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `part`
[INFO] [stdout]   --> src/lifetimes.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         part: &'a str,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `calculation`
[INFO] [stdout]   --> src/closures_iterators.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         calculation: T,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         value: Option<u32>
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.04s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking learningrust v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/enums.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     x = get_location(myipadd);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]  --> src/lifetimes.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let r;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_r` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]  --> src/lifetimes.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         r = &s;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `part`
[INFO] [stdout]   --> src/lifetimes.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         part: &'a str,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/enums.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     x = get_location(myipadd);
[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: field is never read: `calculation`
[INFO] [stdout]   --> src/closures_iterators.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         calculation: T,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]  --> src/lifetimes.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let r;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_r` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         value: Option<u32>
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]  --> src/lifetimes.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         r = &s;
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `part`
[INFO] [stdout]   --> src/lifetimes.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         part: &'a str,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `calculation`
[INFO] [stdout]   --> src/closures_iterators.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         calculation: T,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         value: Option<u32>
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/closures_iterators.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "cfae93b74a976ddfd65c82e2fe8a1defb163eeb417be9b9cd2343b2f7825089b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfae93b74a976ddfd65c82e2fe8a1defb163eeb417be9b9cd2343b2f7825089b", kill_on_drop: false }`
[INFO] [stdout] cfae93b74a976ddfd65c82e2fe8a1defb163eeb417be9b9cd2343b2f7825089b