[INFO] cloning repository https://github.com/StephyGao/Programming-Language-Parser-
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/StephyGao/Programming-Language-Parser-" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephyGao%2FProgramming-Language-Parser-", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephyGao%2FProgramming-Language-Parser-'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 356c71008470558afab5d0ba9e6bfb39c6cee43b
[INFO] building StephyGao/Programming-Language-Parser- against master#222c5724ecc922fe67815f428c19f82c129d9386 for pr-97334
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephyGao%2FProgramming-Language-Parser-" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/StephyGao/Programming-Language-Parser- on toolchain 222c5724ecc922fe67815f428c19f82c129d9386
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/StephyGao/Programming-Language-Parser-
[INFO] finished tweaking git repo https://github.com/StephyGao/Programming-Language-Parser-
[INFO] tweaked toml for git repo https://github.com/StephyGao/Programming-Language-Parser- written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/StephyGao/Programming-Language-Parser- already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad045b47ae545cbdc55420b352bcb866405cc8bfefbf6624682de9701337c43a
[INFO] running `Command { std: "docker" "start" "-a" "ad045b47ae545cbdc55420b352bcb866405cc8bfefbf6624682de9701337c43a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad045b47ae545cbdc55420b352bcb866405cc8bfefbf6624682de9701337c43a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad045b47ae545cbdc55420b352bcb866405cc8bfefbf6624682de9701337c43a", kill_on_drop: false }`
[INFO] [stdout] ad045b47ae545cbdc55420b352bcb866405cc8bfefbf6624682de9701337c43a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 973d96f83ed69954ef870eca986d571c2577e74185cae49753a7dbc1f941b3b4
[INFO] running `Command { std: "docker" "start" "-a" "973d96f83ed69954ef870eca986d571c2577e74185cae49753a7dbc1f941b3b4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/character_stream.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryFrom`
[INFO] [stdout]  --> src/character_stream.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 127 | /         match self.check_declaration_type(pos) {
[INFO] [stdout] 128 | |             Some(next_pos) => {
[INFO] [stdout] 129 | |                 pos = next_pos;
[INFO] [stdout] 130 | |                 match self.check_variable_declaration(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 149 | |             _ => { return None; }
[INFO] [stdout] 150 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 151 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 155 | /         match self.tokens.get(pos) {
[INFO] [stdout] 156 | |             Some(token) => {
[INFO] [stdout] 157 | |                 if token.get_text() == "void" {
[INFO] [stdout] 158 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 199 | |             _ => { return None; }
[INFO] [stdout] 200 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 201 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:223:9
[INFO] [stdout]     |
[INFO] [stdout] 205 | /         match self.check_declaration_type(pos) {
[INFO] [stdout] 206 | |             Some(next_pos) => {
[INFO] [stdout] 207 | |                 match self.check_parameter_block(next_pos) {
[INFO] [stdout] 208 | |                     Some(next_pos2) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 221 | |             _ => { return None; }
[INFO] [stdout] 222 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 223 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 227 | /         match self.check_data_type(pos) {
[INFO] [stdout] 228 | |             Some(next_pos) => {
[INFO] [stdout] 229 | |                 pos = next_pos;
[INFO] [stdout] 230 | |                 match self.tokens.get(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 242 | |             _ => { return None; }
[INFO] [stdout] 243 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 244 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:273:9
[INFO] [stdout]     |
[INFO] [stdout] 248 | /         match self.tokens.get(pos) {
[INFO] [stdout] 249 | |             Some(token) => {
[INFO] [stdout] 250 | |                 if token.get_text() == "=" {
[INFO] [stdout] 251 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 271 | |             _ => { return None; }
[INFO] [stdout] 272 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 273 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:294:9
[INFO] [stdout]     |
[INFO] [stdout] 277 | /         match self.check_parameter_block(pos) {
[INFO] [stdout] 278 | |             Some(next_pos) => {
[INFO] [stdout] 279 | |                 pos = next_pos;
[INFO] [stdout] 280 | |                 match self.tokens.get(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 292 | |             _ => { return None; }
[INFO] [stdout] 293 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 294 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 298 | /         match self.tokens.get(pos) {
[INFO] [stdout] 299 | |             Some(token) => {
[INFO] [stdout] 300 | |                 if token.get_text() == "{" {
[INFO] [stdout] 301 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 335 | |             _ => { return None; }
[INFO] [stdout] 336 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 337 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:392:9
[INFO] [stdout]     |
[INFO] [stdout] 343 | /         match self.tokens.get(pos) {
[INFO] [stdout] 344 | |             Some(token) => {
[INFO] [stdout] 345 | |                 if token.get_text() == "(" { //是不是 （
[INFO] [stdout] 346 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 390 | |             _ => { return None; }
[INFO] [stdout] 391 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 392 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 408 | /         match self.tokens.get(pos) {
[INFO] [stdout] 409 | |             Some(token) => {
[INFO] [stdout] 410 | |                 if token.is_constant() {
[INFO] [stdout] 411 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 417 | |             _ => { return None; }
[INFO] [stdout] 418 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 419 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:475:9
[INFO] [stdout]     |
[INFO] [stdout] 458 | /         match self.check_data_type(pos) {
[INFO] [stdout] 459 | |             Some(next_pos) => {
[INFO] [stdout] 460 | |                 pos = next_pos;
[INFO] [stdout] 461 | |                 match self.tokens.get(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 473 | |             _ => { return None; }
[INFO] [stdout] 474 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 475 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:499:9
[INFO] [stdout]     |
[INFO] [stdout] 487 | /         match self.tokens.get(pos) {
[INFO] [stdout] 488 | |             Some(token) => {
[INFO] [stdout] 489 | |                 match token.get_text() {
[INFO] [stdout] 490 | |                     "char" | "short" | "int" | "long" => {
[INFO] [stdout] ...   |
[INFO] [stdout] 497 | |             _ => { return None; }
[INFO] [stdout] 498 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 499 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:575:9
[INFO] [stdout]     |
[INFO] [stdout] 519 | /         match self.tokens.get(pos) {
[INFO] [stdout] 520 | |             Some(token) => {
[INFO] [stdout] 521 | |                 if token.is_identifier() {
[INFO] [stdout] 522 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 573 | |             _ => { return None; }
[INFO] [stdout] 574 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 575 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:621:9
[INFO] [stdout]     |
[INFO] [stdout] 579 | /         match self.tokens.get(pos) {
[INFO] [stdout] 580 | |             Some(token) => {
[INFO] [stdout] 581 | |                 if token.get_text() == "while" {
[INFO] [stdout] 582 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 619 | |             _ => { return None; }
[INFO] [stdout] 620 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 621 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:667:9
[INFO] [stdout]     |
[INFO] [stdout] 625 | /         match self.tokens.get(pos) {
[INFO] [stdout] 626 | |             Some(token) => {
[INFO] [stdout] 627 | |                 if token.get_text() == "if" {
[INFO] [stdout] 628 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 665 | |             _ => { return None; }
[INFO] [stdout] 666 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 667 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:698:9
[INFO] [stdout]     |
[INFO] [stdout] 671 | /         match self.tokens.get(pos) {
[INFO] [stdout] 672 | |             Some(token) => {
[INFO] [stdout] 673 | |                 if token.get_text() == "return" {
[INFO] [stdout] 674 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 696 | |             _ => { return None; }
[INFO] [stdout] 697 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 698 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:719:9
[INFO] [stdout]     |
[INFO] [stdout] 702 | /         match self.check_simple_expression(pos) {
[INFO] [stdout] 703 | |             Some(next_pos) => {
[INFO] [stdout] 704 | |                 pos = next_pos;
[INFO] [stdout] 705 | |                 match self.check_relation_operator(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 717 | |             _ => { return None; }
[INFO] [stdout] 718 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 719 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:742:9
[INFO] [stdout]     |
[INFO] [stdout] 723 | /         match self.check_term(pos) {
[INFO] [stdout] 724 | |             Some(next_pos) => {
[INFO] [stdout] 725 | |                 pos = next_pos;
[INFO] [stdout] 726 | |                 loop {
[INFO] [stdout] ...   |
[INFO] [stdout] 740 | |             _ => { return None; }
[INFO] [stdout] 741 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 742 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:765:9
[INFO] [stdout]     |
[INFO] [stdout] 746 | /         match self.check_factor(pos) {
[INFO] [stdout] 747 | |             Some(next_pos) => {
[INFO] [stdout] 748 | |                 pos = next_pos;
[INFO] [stdout] 749 | |                 loop {
[INFO] [stdout] ...   |
[INFO] [stdout] 763 | |             _ => { return None; }
[INFO] [stdout] 764 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 765 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:869:9
[INFO] [stdout]     |
[INFO] [stdout] 857 | /         match self.tokens.get(pos) {
[INFO] [stdout] 858 | |             Some(token) => {
[INFO] [stdout] 859 | |                 match token.get_text() {
[INFO] [stdout] 860 | |                     "==" | "<" | ">" | "<=" | ">=" | "!=" => { 
[INFO] [stdout] ...   |
[INFO] [stdout] 867 | |             _ => { return None; }
[INFO] [stdout] 868 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 869 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:885:9
[INFO] [stdout]     |
[INFO] [stdout] 873 | /         match self.tokens.get(pos) {
[INFO] [stdout] 874 | |             Some(token) => {
[INFO] [stdout] 875 | |                 match token.get_text() {
[INFO] [stdout] 876 | |                     "+" | "-" => { 
[INFO] [stdout] ...   |
[INFO] [stdout] 883 | |             _ => { return None; }
[INFO] [stdout] 884 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 885 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:901:9
[INFO] [stdout]     |
[INFO] [stdout] 889 | /         match self.tokens.get(pos) {
[INFO] [stdout] 890 | |             Some(token) => {
[INFO] [stdout] 891 | |                 match token.get_text() {
[INFO] [stdout] 892 | |                     "*" | "/" => {
[INFO] [stdout] ...   |
[INFO] [stdout] 899 | |             _ => { return None; }
[INFO] [stdout] 900 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 901 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/parser.rs:35:18
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Some(x) => {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `space_num` is never read
[INFO] [stdout]   --> src/parser.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let mut space_num = 0;
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/parser.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 for j in 0..space_num {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:24:22
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 Some(mut token) => {
[INFO] [stdout]    |                      ----^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |             let mut text = self.tokens[i].get_text();
[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/parser.rs:204:49
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn check_function_definition(&mut self, mut pos: usize) -> Option<usize> {
[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/parser.rs:801:13
[INFO] [stdout]     |
[INFO] [stdout] 801 |         let mut last_pos = pos;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/character_stream.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn from_str(s: &str) -> CharStream {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `more_available`
[INFO] [stdout]   --> src/character_stream.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn more_available(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NONE`
[INFO] [stdout]  --> src/token.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     NONE,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `TokenType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/token.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_str`
[INFO] [stdout]   --> src/token.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn as_str(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "973d96f83ed69954ef870eca986d571c2577e74185cae49753a7dbc1f941b3b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "973d96f83ed69954ef870eca986d571c2577e74185cae49753a7dbc1f941b3b4", kill_on_drop: false }`
[INFO] [stdout] 973d96f83ed69954ef870eca986d571c2577e74185cae49753a7dbc1f941b3b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 199197f85a14b6443009b740a3b07edabacb0df318cc6bb8f262791d8ba411b6
[INFO] running `Command { std: "docker" "start" "-a" "199197f85a14b6443009b740a3b07edabacb0df318cc6bb8f262791d8ba411b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/character_stream.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryFrom`
[INFO] [stdout]  --> src/character_stream.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 127 | /         match self.check_declaration_type(pos) {
[INFO] [stdout] 128 | |             Some(next_pos) => {
[INFO] [stdout] 129 | |                 pos = next_pos;
[INFO] [stdout] 130 | |                 match self.check_variable_declaration(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 149 | |             _ => { return None; }
[INFO] [stdout] 150 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 151 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 155 | /         match self.tokens.get(pos) {
[INFO] [stdout] 156 | |             Some(token) => {
[INFO] [stdout] 157 | |                 if token.get_text() == "void" {
[INFO] [stdout] 158 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 199 | |             _ => { return None; }
[INFO] [stdout] 200 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 201 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:223:9
[INFO] [stdout]     |
[INFO] [stdout] 205 | /         match self.check_declaration_type(pos) {
[INFO] [stdout] 206 | |             Some(next_pos) => {
[INFO] [stdout] 207 | |                 match self.check_parameter_block(next_pos) {
[INFO] [stdout] 208 | |                     Some(next_pos2) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 221 | |             _ => { return None; }
[INFO] [stdout] 222 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 223 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 227 | /         match self.check_data_type(pos) {
[INFO] [stdout] 228 | |             Some(next_pos) => {
[INFO] [stdout] 229 | |                 pos = next_pos;
[INFO] [stdout] 230 | |                 match self.tokens.get(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 242 | |             _ => { return None; }
[INFO] [stdout] 243 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 244 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:273:9
[INFO] [stdout]     |
[INFO] [stdout] 248 | /         match self.tokens.get(pos) {
[INFO] [stdout] 249 | |             Some(token) => {
[INFO] [stdout] 250 | |                 if token.get_text() == "=" {
[INFO] [stdout] 251 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 271 | |             _ => { return None; }
[INFO] [stdout] 272 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 273 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:294:9
[INFO] [stdout]     |
[INFO] [stdout] 277 | /         match self.check_parameter_block(pos) {
[INFO] [stdout] 278 | |             Some(next_pos) => {
[INFO] [stdout] 279 | |                 pos = next_pos;
[INFO] [stdout] 280 | |                 match self.tokens.get(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 292 | |             _ => { return None; }
[INFO] [stdout] 293 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 294 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 298 | /         match self.tokens.get(pos) {
[INFO] [stdout] 299 | |             Some(token) => {
[INFO] [stdout] 300 | |                 if token.get_text() == "{" {
[INFO] [stdout] 301 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 335 | |             _ => { return None; }
[INFO] [stdout] 336 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 337 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:392:9
[INFO] [stdout]     |
[INFO] [stdout] 343 | /         match self.tokens.get(pos) {
[INFO] [stdout] 344 | |             Some(token) => {
[INFO] [stdout] 345 | |                 if token.get_text() == "(" { //是不是 （
[INFO] [stdout] 346 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 390 | |             _ => { return None; }
[INFO] [stdout] 391 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 392 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 408 | /         match self.tokens.get(pos) {
[INFO] [stdout] 409 | |             Some(token) => {
[INFO] [stdout] 410 | |                 if token.is_constant() {
[INFO] [stdout] 411 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 417 | |             _ => { return None; }
[INFO] [stdout] 418 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 419 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:475:9
[INFO] [stdout]     |
[INFO] [stdout] 458 | /         match self.check_data_type(pos) {
[INFO] [stdout] 459 | |             Some(next_pos) => {
[INFO] [stdout] 460 | |                 pos = next_pos;
[INFO] [stdout] 461 | |                 match self.tokens.get(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 473 | |             _ => { return None; }
[INFO] [stdout] 474 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 475 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:499:9
[INFO] [stdout]     |
[INFO] [stdout] 487 | /         match self.tokens.get(pos) {
[INFO] [stdout] 488 | |             Some(token) => {
[INFO] [stdout] 489 | |                 match token.get_text() {
[INFO] [stdout] 490 | |                     "char" | "short" | "int" | "long" => {
[INFO] [stdout] ...   |
[INFO] [stdout] 497 | |             _ => { return None; }
[INFO] [stdout] 498 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 499 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:575:9
[INFO] [stdout]     |
[INFO] [stdout] 519 | /         match self.tokens.get(pos) {
[INFO] [stdout] 520 | |             Some(token) => {
[INFO] [stdout] 521 | |                 if token.is_identifier() {
[INFO] [stdout] 522 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 573 | |             _ => { return None; }
[INFO] [stdout] 574 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 575 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:621:9
[INFO] [stdout]     |
[INFO] [stdout] 579 | /         match self.tokens.get(pos) {
[INFO] [stdout] 580 | |             Some(token) => {
[INFO] [stdout] 581 | |                 if token.get_text() == "while" {
[INFO] [stdout] 582 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 619 | |             _ => { return None; }
[INFO] [stdout] 620 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 621 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:667:9
[INFO] [stdout]     |
[INFO] [stdout] 625 | /         match self.tokens.get(pos) {
[INFO] [stdout] 626 | |             Some(token) => {
[INFO] [stdout] 627 | |                 if token.get_text() == "if" {
[INFO] [stdout] 628 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 665 | |             _ => { return None; }
[INFO] [stdout] 666 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 667 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:698:9
[INFO] [stdout]     |
[INFO] [stdout] 671 | /         match self.tokens.get(pos) {
[INFO] [stdout] 672 | |             Some(token) => {
[INFO] [stdout] 673 | |                 if token.get_text() == "return" {
[INFO] [stdout] 674 | |                     pos += 1;
[INFO] [stdout] ...   |
[INFO] [stdout] 696 | |             _ => { return None; }
[INFO] [stdout] 697 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 698 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:719:9
[INFO] [stdout]     |
[INFO] [stdout] 702 | /         match self.check_simple_expression(pos) {
[INFO] [stdout] 703 | |             Some(next_pos) => {
[INFO] [stdout] 704 | |                 pos = next_pos;
[INFO] [stdout] 705 | |                 match self.check_relation_operator(pos) {
[INFO] [stdout] ...   |
[INFO] [stdout] 717 | |             _ => { return None; }
[INFO] [stdout] 718 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 719 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:742:9
[INFO] [stdout]     |
[INFO] [stdout] 723 | /         match self.check_term(pos) {
[INFO] [stdout] 724 | |             Some(next_pos) => {
[INFO] [stdout] 725 | |                 pos = next_pos;
[INFO] [stdout] 726 | |                 loop {
[INFO] [stdout] ...   |
[INFO] [stdout] 740 | |             _ => { return None; }
[INFO] [stdout] 741 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 742 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:765:9
[INFO] [stdout]     |
[INFO] [stdout] 746 | /         match self.check_factor(pos) {
[INFO] [stdout] 747 | |             Some(next_pos) => {
[INFO] [stdout] 748 | |                 pos = next_pos;
[INFO] [stdout] 749 | |                 loop {
[INFO] [stdout] ...   |
[INFO] [stdout] 763 | |             _ => { return None; }
[INFO] [stdout] 764 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 765 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:869:9
[INFO] [stdout]     |
[INFO] [stdout] 857 | /         match self.tokens.get(pos) {
[INFO] [stdout] 858 | |             Some(token) => {
[INFO] [stdout] 859 | |                 match token.get_text() {
[INFO] [stdout] 860 | |                     "==" | "<" | ">" | "<=" | ">=" | "!=" => { 
[INFO] [stdout] ...   |
[INFO] [stdout] 867 | |             _ => { return None; }
[INFO] [stdout] 868 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 869 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:885:9
[INFO] [stdout]     |
[INFO] [stdout] 873 | /         match self.tokens.get(pos) {
[INFO] [stdout] 874 | |             Some(token) => {
[INFO] [stdout] 875 | |                 match token.get_text() {
[INFO] [stdout] 876 | |                     "+" | "-" => { 
[INFO] [stdout] ...   |
[INFO] [stdout] 883 | |             _ => { return None; }
[INFO] [stdout] 884 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 885 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parser.rs:901:9
[INFO] [stdout]     |
[INFO] [stdout] 889 | /         match self.tokens.get(pos) {
[INFO] [stdout] 890 | |             Some(token) => {
[INFO] [stdout] 891 | |                 match token.get_text() {
[INFO] [stdout] 892 | |                     "*" | "/" => {
[INFO] [stdout] ...   |
[INFO] [stdout] 899 | |             _ => { return None; }
[INFO] [stdout] 900 | |         }
[INFO] [stdout]     | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 901 |           None
[INFO] [stdout]     |           ^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/parser.rs:35:18
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Some(x) => {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `space_num` is never read
[INFO] [stdout]   --> src/parser.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let mut space_num = 0;
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/parser.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 for j in 0..space_num {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:24:22
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 Some(mut token) => {
[INFO] [stdout]    |                      ----^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |             let mut text = self.tokens[i].get_text();
[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/parser.rs:204:49
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn check_function_definition(&mut self, mut pos: usize) -> Option<usize> {
[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/parser.rs:801:13
[INFO] [stdout]     |
[INFO] [stdout] 801 |         let mut last_pos = pos;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/character_stream.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn from_str(s: &str) -> CharStream {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `more_available`
[INFO] [stdout]   --> src/character_stream.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn more_available(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NONE`
[INFO] [stdout]  --> src/token.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     NONE,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `TokenType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/token.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_str`
[INFO] [stdout]   --> src/token.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn as_str(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.56s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/parser-2e5bf270cdb510be)
[INFO] running `Command { std: "docker" "inspect" "199197f85a14b6443009b740a3b07edabacb0df318cc6bb8f262791d8ba411b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "199197f85a14b6443009b740a3b07edabacb0df318cc6bb8f262791d8ba411b6", kill_on_drop: false }`
[INFO] [stdout] 199197f85a14b6443009b740a3b07edabacb0df318cc6bb8f262791d8ba411b6