[INFO] cloning repository https://github.com/amoghyermalkar123/rust-basics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amoghyermalkar123/rust-basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famoghyermalkar123%2Frust-basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famoghyermalkar123%2Frust-basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d870cb2012c29ef97acb76f27f94fafbe7f3086c
[INFO] checking amoghyermalkar123/rust-basics against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famoghyermalkar123%2Frust-basics" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amoghyermalkar123/rust-basics on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amoghyermalkar123/rust-basics
[INFO] finished tweaking git repo https://github.com/amoghyermalkar123/rust-basics
[INFO] tweaked toml for git repo https://github.com/amoghyermalkar123/rust-basics written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/amoghyermalkar123/rust-basics already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c72553537093e6a2c4629e50772cb5cd6c94dc46198a32c9222f152d8c36abb2
[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" "c72553537093e6a2c4629e50772cb5cd6c94dc46198a32c9222f152d8c36abb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c72553537093e6a2c4629e50772cb5cd6c94dc46198a32c9222f152d8c36abb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c72553537093e6a2c4629e50772cb5cd6c94dc46198a32c9222f152d8c36abb2", kill_on_drop: false }`
[INFO] [stdout] c72553537093e6a2c4629e50772cb5cd6c94dc46198a32c9222f152d8c36abb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45996afb279d91294606bfe70a8c2c8174c0e9c4d2472cf369ae6044f68f1156
[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" "45996afb279d91294606bfe70a8c2c8174c0e9c4d2472cf369ae6044f68f1156", kill_on_drop: false }`
[INFO] [stderr]     Checking collections v0.1.0 (/opt/rustwide/workdir/collections)
[INFO] [stderr]     Checking about_match v0.1.0 (/opt/rustwide/workdir/about_match)
[INFO] [stderr]     Checking error_handling v0.1.0 (/opt/rustwide/workdir/error_handling)
[INFO] [stderr]     Checking ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]     Checking structs v0.1.0 (/opt/rustwide/workdir/structs)
[INFO] [stderr]     Checking enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stderr]     Checking basics v0.1.0 (/opt/rustwide/workdir/basics)
[INFO] [stdout] warning: unused variable: `int64`
[INFO] [stdout]   --> enums/src/lib.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let int64 = RustTypes::IntVariants;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_int64`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> enums/src/lib.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let loopback = IpAddr::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback2`
[INFO] [stdout]   --> enums/src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let loopback2 = IpAddr2::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> enums/src/lib.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let addr = IPs {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]  --> enums/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Int, 
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]  --> enums/src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SmallStr`
[INFO] [stdout]  --> enums/src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     SmallStr,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Boolean`
[INFO] [stdout]  --> enums/src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Boolean,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Generic`
[INFO] [stdout]  --> enums/src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Generic,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]   --> enums/src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     address: IpAddr,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address_two`
[INFO] [stdout]   --> enums/src/lib.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     address_two : IpAddr2,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> error_handling/src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let f = match f {
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> basics/src/data_types.rs:34:10
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> basics/src/data_types.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stats_and_exprs`
[INFO] [stdout]  --> basics/src/functions.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn stats_and_exprs() {
[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: function is never used: `compound_types`
[INFO] [stdout]   --> basics/src/data_types.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn compound_types() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]    --> ownership/src/ownership_basics.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let s1 = gives_ownership(); // gives_ownership moves its return
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]    --> ownership/src/ownership_basics.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let s3 = takes_and_gives_back(s2); // s2 is moved into
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `invalidation`
[INFO] [stdout]   --> ownership/src/ownership_basics.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn invalidation() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copying`
[INFO] [stdout]   --> ownership/src/ownership_basics.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn copying() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership`
[INFO] [stdout]   --> ownership/src/ownership_basics.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub fn ownership() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> ownership/src/ownership_basics.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn takes_ownership(some_string: String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> ownership/src/ownership_basics.rs:96:8
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn makes_copy(number: u8) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `give_and_take_main`
[INFO] [stdout]    --> ownership/src/ownership_basics.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn give_and_take_main() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]    --> ownership/src/ownership_basics.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn gives_ownership() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]    --> ownership/src/ownership_basics.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn takes_and_gives_back(a_string: String) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mainer`
[INFO] [stdout]  --> ownership/src/mutable_reference.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn mainer() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]  --> ownership/src/mutable_reference.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn change(some_string: &mut String) {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `combine_types_of_references`
[INFO] [stdout]   --> ownership/src/mutable_reference.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn combine_types_of_references() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rustbasics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `Command { std: "docker" "inspect" "45996afb279d91294606bfe70a8c2c8174c0e9c4d2472cf369ae6044f68f1156", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45996afb279d91294606bfe70a8c2c8174c0e9c4d2472cf369ae6044f68f1156", kill_on_drop: false }`
[INFO] [stdout] 45996afb279d91294606bfe70a8c2c8174c0e9c4d2472cf369ae6044f68f1156