[INFO] fetching crate rust_demos 0.1.0...
[INFO] testing rust_demos-0.1.0 against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] extracting crate rust_demos 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate rust_demos 0.1.0
[INFO] finished tweaking crates.io crate rust_demos 0.1.0
[INFO] tweaked toml for crates.io crate rust_demos 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_demos 0.1.0 on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rust_demos 0.1.0 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" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded socket2 v0.5.9
[INFO] [stderr]   Downloaded tokio v1.44.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80918abfa7de940c6840e8c870830c66cd014f57545a942832453f55b78e863f
[INFO] running `Command { std: "docker" "start" "-a" "80918abfa7de940c6840e8c870830c66cd014f57545a942832453f55b78e863f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80918abfa7de940c6840e8c870830c66cd014f57545a942832453f55b78e863f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80918abfa7de940c6840e8c870830c66cd014f57545a942832453f55b78e863f", kill_on_drop: false }`
[INFO] [stdout] 80918abfa7de940c6840e8c870830c66cd014f57545a942832453f55b78e863f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53991812635ab9946738a9b84dadf43a89786209b360e955d95cd78595cbaf64
[INFO] running `Command { std: "docker" "start" "-a" "53991812635ab9946738a9b84dadf43a89786209b360e955d95cd78595cbaf64", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling smallvec v1.15.0
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]    Compiling socket2 v0.5.9
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tokio v1.44.2
[INFO] [stderr]    Compiling rust_demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `prime`
[INFO] [stdout]  --> src/bin/error.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let prime=match is_prime(n){
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_prime`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/iterators.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut score_iter=scores.iter().clone();
[INFO] [stdout]   |         ----^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]  --> src/bin/reading.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |                 unwrap_or_else(|error|{
[INFO] [stdout]   |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bin/lifetime.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let a:u8 = 25;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_username` is never used
[INFO] [stdout]   --> src/bin/slice_input.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn get_username(mail:&String)->&str{
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]  --> src/bin/lifetime.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let p:&u8;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/bin/lifetime.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let b:u8 = 50;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]   --> src/bin/struct.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 |             format!{"Name is {} age is {} got {} marks",self.name,self.age,self.marks};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |             let _ = format!{"Name is {} age is {} got {} marks",self.name,self.age,self.marks};
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/unique.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut word=input.trim().replace("\t","").replace(" ","");
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `empid` is never read
[INFO] [stdout]  --> src/bin/empl_struct.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Emp{
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 3 |     empid:i16,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Emp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/sample.rs:46:19
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn display_strlen(mut s:String)->(String,usize){
[INFO] [stdout]    |                   ----^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/basics.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut example;
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `example` is assigned to, but never used
[INFO] [stdout]   --> src/bin/basics.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut example;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_example` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `example` is never read
[INFO] [stdout]   --> src/bin/basics.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     example=10; 
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.65s
[INFO] running `Command { std: "docker" "inspect" "53991812635ab9946738a9b84dadf43a89786209b360e955d95cd78595cbaf64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53991812635ab9946738a9b84dadf43a89786209b360e955d95cd78595cbaf64", kill_on_drop: false }`
[INFO] [stdout] 53991812635ab9946738a9b84dadf43a89786209b360e955d95cd78595cbaf64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93f562c87d9abf7a99f9fa2389856fa6f15ab7bfb7e471ad46e1e4f513a595d8
[INFO] running `Command { std: "docker" "start" "-a" "93f562c87d9abf7a99f9fa2389856fa6f15ab7bfb7e471ad46e1e4f513a595d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]  --> src/bin/reading.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |                 unwrap_or_else(|error|{
[INFO] [stdout]   |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/sample.rs:46:19
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn display_strlen(mut s:String)->(String,usize){
[INFO] [stdout]    |                   ----^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]   --> src/bin/struct.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 |             format!{"Name is {} age is {} got {} marks",self.name,self.age,self.marks};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |             let _ = format!{"Name is {} age is {} got {} marks",self.name,self.age,self.marks};
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/iterators.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut score_iter=scores.iter().clone();
[INFO] [stdout]   |         ----^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_username` is never used
[INFO] [stdout]   --> src/bin/slice_input.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn get_username(mail:&String)->&str{
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/basics.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut example;
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `example` is assigned to, but never used
[INFO] [stdout]   --> src/bin/basics.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut example;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_example` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `example` is never read
[INFO] [stdout]   --> src/bin/basics.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     example=10; 
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bin/lifetime.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let a:u8 = 25;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]  --> src/bin/lifetime.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let p:&u8;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/bin/lifetime.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let b:u8 = 50;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prime`
[INFO] [stdout]  --> src/bin/error.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let prime=match is_prime(n){
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_prime`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/unique.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut word=input.trim().replace("\t","").replace(" ","");
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `empid` is never read
[INFO] [stdout]  --> src/bin/empl_struct.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Emp{
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 3 |     empid:i16,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Emp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "93f562c87d9abf7a99f9fa2389856fa6f15ab7bfb7e471ad46e1e4f513a595d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93f562c87d9abf7a99f9fa2389856fa6f15ab7bfb7e471ad46e1e4f513a595d8", kill_on_drop: false }`
[INFO] [stdout] 93f562c87d9abf7a99f9fa2389856fa6f15ab7bfb7e471ad46e1e4f513a595d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6eba020ecec2b12ea996ae14cf84f658b705e91e691e1f9df3e2c84e7fb761ec
[INFO] running `Command { std: "docker" "start" "-a" "6eba020ecec2b12ea996ae14cf84f658b705e91e691e1f9df3e2c84e7fb761ec", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/bin/lifetime.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let a:u8 = 25;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]  --> src/bin/lifetime.rs:5:6
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let p:&u8;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]  --> src/bin/lifetime.rs:7:7
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let b:u8 = 50;
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "lifetime" test) generated 3 warnings (run `cargo fix --bin "lifetime" -p rust_demos --tests` to apply 3 suggestions)
[INFO] [stderr] warning: unused return value of `must_use` that must be used
[INFO] [stderr]   --> src/bin/struct.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 |             format!{"Name is {} age is {} got {} marks",self.name,self.age,self.marks};
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 14 |             let _ = format!{"Name is {} age is {} got {} marks",self.name,self.age,self.marks};
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "struct" test) generated 1 warning
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/sample.rs:46:19
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn display_strlen(mut s:String)->(String,usize){
[INFO] [stderr]    |                   ----^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "sample" test) generated 1 warning (run `cargo fix --bin "sample" -p rust_demos --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `prime`
[INFO] [stderr]  --> src/bin/error.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let prime=match is_prime(n){
[INFO] [stderr]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_prime`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "error" test) generated 1 warning (run `cargo fix --bin "error" -p rust_demos --tests` to apply 1 suggestion)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/bin/unique.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut word=input.trim().replace("\t","").replace(" ","");
[INFO] [stderr]   |         ----^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "unique" test) generated 1 warning (run `cargo fix --bin "unique" -p rust_demos --tests` to apply 1 suggestion)
[INFO] [stderr] warning: function `get_username` is never used
[INFO] [stderr]   --> src/bin/slice_input.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn get_username(mail:&String)->&str{
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "slice_input" test) generated 1 warning
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/bin/iterators.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let mut score_iter=scores.iter().clone();
[INFO] [stderr]   |         ----^^^^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "iterators" test) generated 1 warning (run `cargo fix --bin "iterators" -p rust_demos --tests` to apply 1 suggestion)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/basics.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut example;
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `example` is assigned to, but never used
[INFO] [stderr]   --> src/bin/basics.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut example;
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_example` instead
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `example` is never read
[INFO] [stderr]   --> src/bin/basics.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     example=10; 
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "basics" test) generated 3 warnings (run `cargo fix --bin "basics" -p rust_demos --tests` to apply 1 suggestion)
[INFO] [stderr] warning: field `empid` is never read
[INFO] [stderr]  --> src/bin/empl_struct.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Emp{
[INFO] [stderr]   |        --- field in this struct
[INFO] [stderr] 3 |     empid:i16,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Emp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "empl_struct" test) generated 1 warning
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]  --> src/bin/reading.rs:7:21
[INFO] [stderr]   |
[INFO] [stderr] 7 |                 unwrap_or_else(|error|{
[INFO] [stderr]   |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demos` (bin "reading" test) generated 1 warning (run `cargo fix --bin "reading" -p rust_demos --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_demos-aec1a136cf3a4dcd)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/addAssign_trait.rs (/opt/rustwide/target/debug/deps/addAssign_trait-c24e2a4474f256ae)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/add_trait.rs (/opt/rustwide/target/debug/deps/add_trait-d4b683b61bafa5f5)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/area_peri.rs (/opt/rustwide/target/debug/deps/area_peri-d035cba2dba6d619)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/arithProg.rs (/opt/rustwide/target/debug/deps/arithProg-a72f31b79a6a7763)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/basics.rs (/opt/rustwide/target/debug/deps/basics-ffea5c3e285fe4f5)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/closure_factorial.rs (/opt/rustwide/target/debug/deps/closure_factorial-ae70e331fc5266c8)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/closure_sqrt.rs (/opt/rustwide/target/debug/deps/closure_sqrt-8238d5b9621d8d4c)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/bin/closures.rs (/opt/rustwide/target/debug/deps/closures-cacf6bf1efd36855)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/cmdLineArgs.rs (/opt/rustwide/target/debug/deps/cmdLineArgs-a889a3525212f80c)
[INFO] [stderr]      Running unittests src/bin/empl_struct.rs (/opt/rustwide/target/debug/deps/empl_struct-b46733c3d561dee7)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/error.rs (/opt/rustwide/target/debug/deps/error-8757d0c44d3be606)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/fibonacci.rs (/opt/rustwide/target/debug/deps/fibonacci-4bf26d2ce2feedc8)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/hashMap.rs (/opt/rustwide/target/debug/deps/hashMap-d16529444776b9a2)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/iterators.rs (/opt/rustwide/target/debug/deps/iterators-63b16f828190d817)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/largest.rs (/opt/rustwide/target/debug/deps/largest-20f6bbbc208733c2)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/lifetime.rs (/opt/rustwide/target/debug/deps/lifetime-2bde9ca6c8d15a91)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/bin/ownership.rs (/opt/rustwide/target/debug/deps/ownership-1dc4a7fbfd8a5997)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/ownership_exercise.rs (/opt/rustwide/target/debug/deps/ownership_exercise-e352617d6ab373e9)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/bin/partialOrd_trait.rs (/opt/rustwide/target/debug/deps/partialOrd_trait-6f45feae00aff528)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/query_search.rs (/opt/rustwide/target/debug/deps/query_search-11e7b3b4874d4e30)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/reading.rs (/opt/rustwide/target/debug/deps/reading-dcb760cad05a4a86)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_demos-029c0625d6c441e3)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/sample.rs (/opt/rustwide/target/debug/deps/sample-dabb53bb055435c4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/slice_input.rs (/opt/rustwide/target/debug/deps/slice_input-2481ca0b2662d4ae)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/struct.rs (/opt/rustwide/target/debug/deps/struct-1c4853c7303e08be)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/unique.rs (/opt/rustwide/target/debug/deps/unique-0cd64b950e950766)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_demos
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6eba020ecec2b12ea996ae14cf84f658b705e91e691e1f9df3e2c84e7fb761ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eba020ecec2b12ea996ae14cf84f658b705e91e691e1f9df3e2c84e7fb761ec", kill_on_drop: false }`
[INFO] [stdout] 6eba020ecec2b12ea996ae14cf84f658b705e91e691e1f9df3e2c84e7fb761ec
