[INFO] cloning repository https://github.com/AlexisInsMu/huffman_coder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlexisInsMu/huffman_coder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexisInsMu%2Fhuffman_coder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexisInsMu%2Fhuffman_coder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1e3092d77f3c16a29191b9689c351f5a853834b
[INFO] testing AlexisInsMu/huffman_coder against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlexisInsMu%2Fhuffman_coder" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AlexisInsMu/huffman_coder
[INFO] finished tweaking git repo https://github.com/AlexisInsMu/huffman_coder
[INFO] tweaked toml for git repo https://github.com/AlexisInsMu/huffman_coder written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AlexisInsMu/huffman_coder on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AlexisInsMu/huffman_coder 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" "+1ef7943ee607160a564655b6596f83670ef95df5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28949a40a6cd2a1418612d1f59b0df9f7801797c396857ed9a3a813c09b18b63
[INFO] running `Command { std: "docker" "start" "-a" "28949a40a6cd2a1418612d1f59b0df9f7801797c396857ed9a3a813c09b18b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28949a40a6cd2a1418612d1f59b0df9f7801797c396857ed9a3a813c09b18b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28949a40a6cd2a1418612d1f59b0df9f7801797c396857ed9a3a813c09b18b63", kill_on_drop: false }`
[INFO] [stdout] 28949a40a6cd2a1418612d1f59b0df9f7801797c396857ed9a3a813c09b18b63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04d19337dd1d1edfba372a6379aa2f79d2a98f9c582c5dab18e8f55b7ed6d4ca
[INFO] running `Command { std: "docker" "start" "-a" "04d19337dd1d1edfba372a6379aa2f79d2a98f9c582c5dab18e8f55b7ed6d4ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman_coder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `codes`
[INFO] [stdout]    --> src/lib.rs:107:10
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_codes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:107:18
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/lib.rs:156:12
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]    --> src/lib.rs:126:28
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn encode(input: &str, file_name: String) -> i64 {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iscorrect`
[INFO] [stdout]    --> src/lib.rs:156:16
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iscorrect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `deserialize` is never used
[INFO] [stdout]   --> src/lib.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Node{
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn deserialize(buffer: &mut &[u8]) -> Option<Box<Node>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_tree_and_text_from_file` is never used
[INFO] [stdout]    --> src/lib.rs:180:4
[INFO] [stdout]     |
[INFO] [stdout] 180 | fn load_tree_and_text_from_file(file_name: &str) -> Result<(Option<Box<Node>>, String)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "04d19337dd1d1edfba372a6379aa2f79d2a98f9c582c5dab18e8f55b7ed6d4ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04d19337dd1d1edfba372a6379aa2f79d2a98f9c582c5dab18e8f55b7ed6d4ca", kill_on_drop: false }`
[INFO] [stdout] 04d19337dd1d1edfba372a6379aa2f79d2a98f9c582c5dab18e8f55b7ed6d4ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebaaf1e4f07d4445db88898010cd068090d43846e946b2f95b8ab77293545acc
[INFO] running `Command { std: "docker" "start" "-a" "ebaaf1e4f07d4445db88898010cd068090d43846e946b2f95b8ab77293545acc", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman_coder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `codes`
[INFO] [stdout]    --> src/lib.rs:107:10
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_codes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:107:18
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/lib.rs:156:12
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]    --> src/lib.rs:126:28
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn encode(input: &str, file_name: String) -> i64 {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iscorrect`
[INFO] [stdout]    --> src/lib.rs:156:16
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iscorrect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `deserialize` is never used
[INFO] [stdout]   --> src/lib.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Node{
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn deserialize(buffer: &mut &[u8]) -> Option<Box<Node>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_tree_and_text_from_file` is never used
[INFO] [stdout]    --> src/lib.rs:180:4
[INFO] [stdout]     |
[INFO] [stdout] 180 | fn load_tree_and_text_from_file(file_name: &str) -> Result<(Option<Box<Node>>, String)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `codes`
[INFO] [stdout]    --> src/lib.rs:107:10
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_codes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:107:18
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/lib.rs:156:12
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]    --> src/lib.rs:126:28
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn encode(input: &str, file_name: String) -> i64 {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iscorrect`
[INFO] [stdout]    --> src/lib.rs:156:16
[INFO] [stdout]     |
[INFO] [stdout] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iscorrect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "ebaaf1e4f07d4445db88898010cd068090d43846e946b2f95b8ab77293545acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebaaf1e4f07d4445db88898010cd068090d43846e946b2f95b8ab77293545acc", kill_on_drop: false }`
[INFO] [stdout] ebaaf1e4f07d4445db88898010cd068090d43846e946b2f95b8ab77293545acc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 73fe6e6476e4cc36956083b9b96cf44d8a518868321131db20ec7944f9ea14f3
[INFO] running `Command { std: "docker" "start" "-a" "73fe6e6476e4cc36956083b9b96cf44d8a518868321131db20ec7944f9ea14f3", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `codes`
[INFO] [stderr]    --> src/lib.rs:107:10
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stderr]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_codes`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chars`
[INFO] [stderr]    --> src/lib.rs:107:18
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let (codes , chars): (Vec<String>, Vec<char>);
[INFO] [stderr]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable `if let` pattern
[INFO] [stderr]    --> src/lib.rs:156:12
[INFO] [stderr]     |
[INFO] [stderr] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stderr]     = help: consider replacing the `if let` with a `let`
[INFO] [stderr]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_name`
[INFO] [stderr]    --> src/lib.rs:126:28
[INFO] [stderr]     |
[INFO] [stderr] 126 | pub fn encode(input: &str, file_name: String) -> i64 {
[INFO] [stderr]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iscorrect`
[INFO] [stderr]    --> src/lib.rs:156:16
[INFO] [stderr]     |
[INFO] [stderr] 156 |         if let iscorrect = save_file(&main_node, result, "output.bin".to_string().as_str()){
[INFO] [stderr]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iscorrect`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `deserialize` is never used
[INFO] [stderr]   --> src/lib.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | impl Node{
[INFO] [stderr]    | --------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 48 |     pub fn deserialize(buffer: &mut &[u8]) -> Option<Box<Node>> {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `load_tree_and_text_from_file` is never used
[INFO] [stderr]    --> src/lib.rs:180:4
[INFO] [stderr]     |
[INFO] [stderr] 180 | fn load_tree_and_text_from_file(file_name: &str) -> Result<(Option<Box<Node>>, String)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `huffman_coder` (lib) generated 7 warnings (run `cargo fix --lib -p huffman_coder` to apply 4 suggestions)
[INFO] [stderr] warning: `huffman_coder` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/huffman_coder-0933991dbc3fd00a)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::test_encode ... ok
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stdout] test tests::test_save_and_load_tree ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::test_save_and_load_tree stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_save_and_load_tree' (27) panicked at src/lib.rs:233:56:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5badbf382802 - std::backtrace_rs::backtrace::libunwind::trace::h786de35fecf3582f
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5badbf382802 - std::backtrace_rs::backtrace::trace_unsynchronized::h4a7da1a2a64387f1
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5badbf382802 - std::sys::backtrace::_print_fmt::h6bd7d500070c788c
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5badbf382802 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6d82c1afff976903
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5badbf3926cf - core::fmt::rt::Argument::fmt::hc4ce6d643d397690
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5badbf3926cf - core::fmt::write::hb1e7ca88b6a3936e
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/fmt/mod.rs:1469:25
[INFO] [stdout]    6:     0x5badbf3501a3 - std::io::default_write_fmt::haffd49d96f1984a8
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5badbf3501a3 - std::io::Write::write_fmt::h027871c57cf57c01
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5badbf35c072 - std::sys::backtrace::BacktraceLock::print::ha2430613ee79d059
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5badbf360b4f - std::panicking::default_hook::{{closure}}::hdbd2db9e5c303cf6
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x5badbf3609e1 - std::panicking::default_hook::hed93c70cba5fdcf0
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x5badbf323bae - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd0ee8b569efc6a07
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   12:     0x5badbf323bae - test::test_main_with_exit_callback::{{closure}}::hf10864b576ecd15d
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5badbf36115f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3a55ca34534c0d00
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   14:     0x5badbf36115f - std::panicking::panic_with_hook::h3862d766c2cec19b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x5badbf360fba - std::panicking::panic_handler::{{closure}}::hb95eb402b5e28ee1
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:707:13
[INFO] [stdout]   16:     0x5badbf35c1a9 - std::sys::backtrace::__rust_end_short_backtrace::hf73a26dc1835d85a
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5badbf344a9d - __rustc[6ed5915ee467787]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x5badbf39a0a0 - core::panicking::panic_fmt::h3454303eb8e6f7cd
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5badbf3997c6 - core::result::unwrap_failed::h2380020e6daeb464
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/result.rs:1862:5
[INFO] [stdout]   20:     0x5badbf2ff05b - core::result::Result<T,E>::unwrap::hd0cf3cc4aa8fc469
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5badbf2ff05b - huffman_coder::tests::test_save_and_load_tree::h578a200b692b1e79
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib.rs:233:56
[INFO] [stdout]   22:     0x5badbf2ff537 - huffman_coder::tests::test_save_and_load_tree::{{closure}}::h4b566699de0a5f29
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib.rs:226:33
[INFO] [stdout]   23:     0x5badbf3006f6 - core::ops::function::FnOnce::call_once::h7686e94597c51d86
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5badbf32398b - core::ops::function::FnOnce::call_once::ha729ee35d2fab541
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5badbf32398b - test::__rust_begin_short_backtrace::ha40f4db8207e1111
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x5badbf337a0d - test::run_test_in_process::{{closure}}::hc1b77cda5d44f0f3
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x5badbf337a0d - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1dbea1de64785521
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x5badbf337a0d - std::panicking::catch_unwind::do_call::hd5febe9affd5a1b3
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:590:40
[INFO] [stdout]   29:     0x5badbf337a0d - std::panicking::catch_unwind::h51ea89627559b6f4
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:553:19
[INFO] [stdout]   30:     0x5badbf337a0d - std::panic::catch_unwind::hb8b8c2367cae3d66
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5badbf337a0d - test::run_test_in_process::ha5b55801407ea100
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x5badbf337a0d - test::run_test::{{closure}}::h0b9d4072b527abf5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x5badbf310f24 - test::run_test::{{closure}}::hb1056b5731205822
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x5badbf310f24 - std::sys::backtrace::__rust_begin_short_backtrace::hb61ff5a34023c7ef
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x5badbf31485a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hb0a83c0e8b353cff
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/thread/mod.rs:562:17
[INFO] [stdout]   36:     0x5badbf31485a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb4f32cb008535298
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x5badbf31485a - std::panicking::catch_unwind::do_call::h16d110e4fc35789a
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:590:40
[INFO] [stdout]   38:     0x5badbf31485a - std::panicking::catch_unwind::hea9118f355699c4b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:553:19
[INFO] [stdout]   39:     0x5badbf31485a - std::panic::catch_unwind::hf4b3c2a06d3f42f5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5badbf31485a - std::thread::Builder::spawn_unchecked_::{{closure}}::h3f4cb733a52d53d5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/thread/mod.rs:560:30
[INFO] [stdout]   41:     0x5badbf31485a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4052f0967b37caeb
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5badbf3575af - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ec433abd3f148b4
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2085:9
[INFO] [stdout]   43:     0x5badbf3575af - std::sys::thread::unix::Thread::new::thread_start::he514622d3d7ba65c
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/thread/unix.rs:124:17
[INFO] [stdout]   44:     0x7c5d44584aa4 - <unknown>
[INFO] [stdout]   45:     0x7c5d44611a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::test_save_and_load_tree
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "73fe6e6476e4cc36956083b9b96cf44d8a518868321131db20ec7944f9ea14f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73fe6e6476e4cc36956083b9b96cf44d8a518868321131db20ec7944f9ea14f3", kill_on_drop: false }`
[INFO] [stdout] 73fe6e6476e4cc36956083b9b96cf44d8a518868321131db20ec7944f9ea14f3
