[INFO] cloning repository https://github.com/Grndelwald/json2csv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Grndelwald/json2csv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrndelwald%2Fjson2csv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrndelwald%2Fjson2csv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 317b7a1b81cda0b536a2ae39a6609199a624ba79
[INFO] checking Grndelwald/json2csv against try#e983148bd5f0f0db270bfb72149f5e892e68b67f for pr-150322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrndelwald%2Fjson2csv" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Grndelwald/json2csv
[INFO] finished tweaking git repo https://github.com/Grndelwald/json2csv
[INFO] tweaked toml for git repo https://github.com/Grndelwald/json2csv written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Grndelwald/json2csv on toolchain e983148bd5f0f0db270bfb72149f5e892e68b67f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Grndelwald/json2csv 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" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v4.5.17
[INFO] [stderr]   Downloaded clap_builder v4.5.17
[INFO] [stderr]   Downloaded csv v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c9d1be0dc9addd752b9b36b9398b0ad6b1572e54936c3896a242ebe3ac2b1956
[INFO] running `Command { std: "docker" "start" "-a" "c9d1be0dc9addd752b9b36b9398b0ad6b1572e54936c3896a242ebe3ac2b1956", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9d1be0dc9addd752b9b36b9398b0ad6b1572e54936c3896a242ebe3ac2b1956", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9d1be0dc9addd752b9b36b9398b0ad6b1572e54936c3896a242ebe3ac2b1956", kill_on_drop: false }`
[INFO] [stdout] c9d1be0dc9addd752b9b36b9398b0ad6b1572e54936c3896a242ebe3ac2b1956
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26c45428113a349bed1d9bc62ff745ef3f6edd90598a7fc28418481f93fa3c56
[INFO] running `Command { std: "docker" "start" "-a" "26c45428113a349bed1d9bc62ff745ef3f6edd90598a7fc28418481f93fa3c56", kill_on_drop: false }`
[INFO] [stderr]     Checking colorchoice v1.0.2
[INFO] [stderr]     Checking anstyle-query v1.1.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]     Checking anstyle-parse v0.2.5
[INFO] [stderr]     Checking clap_lex v0.7.2
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking anstream v0.6.15
[INFO] [stderr]     Checking clap_builder v4.5.17
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling clap_derive v4.5.13
[INFO] [stderr]     Checking clap v4.5.17
[INFO] [stderr]     Checking serde v1.0.210
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking serde_json v1.0.128
[INFO] [stderr]     Checking jsontocsv v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Subcommand`
[INFO] [stdout]   --> src/main.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 | use clap::{Parser, Subcommand};
[INFO] [stdout]    |                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Subcommand`
[INFO] [stdout]   --> src/main.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 | use clap::{Parser, Subcommand};
[INFO] [stdout]    |                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `std::option::Option<bool>` doesn't implement `std::fmt::Display`
[INFO] [stdout]    --> src/main.rs:274:44
[INFO] [stdout]     |
[INFO] [stdout] 274 |         writer.write_field(self.is_ignored.to_string()).unwrap();
[INFO] [stdout]     |                                            ^^^^^^^^^ method cannot be called on `std::option::Option<bool>` due to unsatisfied trait bounds
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `std::option::Option<bool>: std::fmt::Display`
[INFO] [stdout]             which is required by `std::option::Option<bool>: ToString`
[INFO] [stdout] note: the method `to_string` exists on the type `bool`
[INFO] [stdout]    --> /rustc/e983148bd5f0f0db270bfb72149f5e892e68b67f/library/alloc/src/string.rs:2850:4
[INFO] [stdout] help: consider using `Option::expect` to unwrap the `bool` value, panicking if the value is an `Option::None`
[INFO] [stdout]     |
[INFO] [stdout] 274 |         writer.write_field(self.is_ignored.expect("REASON").to_string()).unwrap();
[INFO] [stdout]     |                                           +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `std::option::Option<bool>` doesn't implement `std::fmt::Display`
[INFO] [stdout]    --> src/main.rs:274:44
[INFO] [stdout]     |
[INFO] [stdout] 274 |         writer.write_field(self.is_ignored.to_string()).unwrap();
[INFO] [stdout]     |                                            ^^^^^^^^^ method cannot be called on `std::option::Option<bool>` due to unsatisfied trait bounds
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `std::option::Option<bool>: std::fmt::Display`
[INFO] [stdout]             which is required by `std::option::Option<bool>: ToString`
[INFO] [stdout] note: the method `to_string` exists on the type `bool`
[INFO] [stdout]    --> /rustc/e983148bd5f0f0db270bfb72149f5e892e68b67f/library/alloc/src/string.rs:2850:4
[INFO] [stdout] help: consider using `Option::expect` to unwrap the `bool` value, panicking if the value is an `Option::None`
[INFO] [stdout]     |
[INFO] [stdout] 274 |         writer.write_field(self.is_ignored.expect("REASON").to_string()).unwrap();
[INFO] [stdout]     |                                           +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:53
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[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/main.rs:69:53
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[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/main.rs:93:53
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]    |                                                     ----^^^^
[INFO] [stdout]    |                                                     |
[INFO] [stdout]    |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:93:53
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]    |                                                     ----^^^^
[INFO] [stdout]    |                                                     |
[INFO] [stdout]    |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:118:53
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:118:53
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:143:53
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:143:53
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:161:53
[INFO] [stdout]     |
[INFO] [stdout] 161 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:161:53
[INFO] [stdout]     |
[INFO] [stdout] 161 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[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/main.rs:161:53
[INFO] [stdout]     |
[INFO] [stdout] 161 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:161:53
[INFO] [stdout]     |
[INFO] [stdout] 161 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[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/main.rs:180:53
[INFO] [stdout]     |
[INFO] [stdout] 180 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:180:53
[INFO] [stdout]     |
[INFO] [stdout] 180 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:196:53
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:196:26
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:196:53
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:196:68
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:196:53
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:196:26
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:196:53
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:196:68
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:210:53
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:210:53
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:236:53
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:236:53
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:236:68
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:236:53
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:236:53
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:236:68
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:291:53
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:291:53
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:317:53
[INFO] [stdout]     |
[INFO] [stdout] 317 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:317:53
[INFO] [stdout]     |
[INFO] [stdout] 317 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:334:53
[INFO] [stdout]     |
[INFO] [stdout] 334 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:334:53
[INFO] [stdout]     |
[INFO] [stdout] 334 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:360:53
[INFO] [stdout]     |
[INFO] [stdout] 360 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:360:53
[INFO] [stdout]     |
[INFO] [stdout] 360 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:382:53
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:382:26
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:382:53
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:382:68
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:382:53
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:382:26
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:382:53
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:382:68
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:394:53
[INFO] [stdout]     |
[INFO] [stdout] 394 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:419:53
[INFO] [stdout]     |
[INFO] [stdout] 419 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:394:53
[INFO] [stdout]     |
[INFO] [stdout] 394 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:419:53
[INFO] [stdout]     |
[INFO] [stdout] 419 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:441:53
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:441:26
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:441:53
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:441:68
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:441:53
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:441:26
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:441:53
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:441:68
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:452:53
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:452:26
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:452:53
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:452:68
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:452:53
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:452:26
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:452:53
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:452:68
[INFO] [stdout]     |
[INFO] [stdout] 452 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:465:53
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:465:53
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:465:68
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:465:53
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:465:53
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:465:68
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:476:53
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:476:26
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:476:53
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:476:68
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:476:53
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:476:26
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:476:53
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:476:68
[INFO] [stdout]     |
[INFO] [stdout] 476 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:488:53
[INFO] [stdout]     |
[INFO] [stdout] 488 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:488:53
[INFO] [stdout]     |
[INFO] [stdout] 488 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:504:53
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:504:26
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:488:53
[INFO] [stdout]     |
[INFO] [stdout] 488 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:504:53
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:504:68
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:488:53
[INFO] [stdout]     |
[INFO] [stdout] 488 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:523:9
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut json_data: String = std::fs::read_to_string(args.file.as_ref().unwrap().as_str()).unwrap();
[INFO] [stdout]     |         ----^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:524:9
[INFO] [stdout]     |
[INFO] [stdout] 524 |     let mut data: Welcome = serde_json::from_str(json_data.as_str()).unwrap();
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:552:9
[INFO] [stdout]     |
[INFO] [stdout] 552 |     let mut s_no = 0 as u64;
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:504:53
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ----^^^^
[INFO] [stdout]     |                                                     |
[INFO] [stdout]     |                                                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/main.rs:504:26
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_no`
[INFO] [stdout]    --> src/main.rs:504:53
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_s_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:504:68
[INFO] [stdout]     |
[INFO] [stdout] 504 |     fn write_data(&self, writer: &mut Writer<File>, mut s_no: u64, args: &Args) {
[INFO] [stdout]     |                                                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:523:9
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut json_data: String = std::fs::read_to_string(args.file.as_ref().unwrap().as_str()).unwrap();
[INFO] [stdout]     |         ----^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:524:9
[INFO] [stdout]     |
[INFO] [stdout] 524 |     let mut data: Welcome = serde_json::from_str(json_data.as_str()).unwrap();
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:552:9
[INFO] [stdout]     |
[INFO] [stdout] 552 |     let mut s_no = 0 as u64;
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jsontocsv` (bin "jsontocsv" test) due to 1 previous error; 51 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `jsontocsv` (bin "jsontocsv") due to 1 previous error; 51 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "26c45428113a349bed1d9bc62ff745ef3f6edd90598a7fc28418481f93fa3c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26c45428113a349bed1d9bc62ff745ef3f6edd90598a7fc28418481f93fa3c56", kill_on_drop: false }`
[INFO] [stdout] 26c45428113a349bed1d9bc62ff745ef3f6edd90598a7fc28418481f93fa3c56
