[INFO] cloning repository https://github.com/Arandur/tryst
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Arandur/tryst" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArandur%2Ftryst", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArandur%2Ftryst'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e5aa700d3327ed3f784cdf85f07c74794f69b7cc
[INFO] testing Arandur/tryst against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArandur%2Ftryst" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Arandur/tryst
[INFO] finished tweaking git repo https://github.com/Arandur/tryst
[INFO] tweaked toml for git repo https://github.com/Arandur/tryst written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Arandur/tryst on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Arandur/tryst 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac7e2caf7fcbf84ceb4772063200dfb1d951107f61a474db1f3acd4f94e69781
[INFO] running `Command { std: "docker" "start" "-a" "ac7e2caf7fcbf84ceb4772063200dfb1d951107f61a474db1f3acd4f94e69781", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac7e2caf7fcbf84ceb4772063200dfb1d951107f61a474db1f3acd4f94e69781", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac7e2caf7fcbf84ceb4772063200dfb1d951107f61a474db1f3acd4f94e69781", kill_on_drop: false }`
[INFO] [stdout] ac7e2caf7fcbf84ceb4772063200dfb1d951107f61a474db1f3acd4f94e69781
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b66d6401454797e00a4723ab9b5272fc097618c5702cd19d07a46e8e48f7d114
[INFO] running `Command { std: "docker" "start" "-a" "b66d6401454797e00a4723ab9b5272fc097618c5702cd19d07a46e8e48f7d114", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling tryst v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]   --> src/read/lexer/mod.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Lexer<R: Read> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/read/lexer/mod.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn lexer<R: Read>(source: R) -> Lexer<R> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chars` is never constructed
[INFO] [stdout]   --> src/read/lexer/chars/mod.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Chars<R: Read> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chars` is never used
[INFO] [stdout]   --> src/read/lexer/chars/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn chars<R: Read>(r: R) -> Chars<R> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Eof` is never constructed
[INFO] [stdout]   --> src/read/lexer/chars/mod.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 65 |     Eof
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ByteKind` is never used
[INFO] [stdout]  --> src/read/lexer/chars/byte_kind.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum ByteKind {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `of` is never used
[INFO] [stdout]   --> src/read/lexer/chars/byte_kind.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl ByteKind {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 12 |     pub fn of(b: u8) -> ByteKind {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BYTE_KIND_LUT` is never used
[INFO] [stdout]   --> src/read/lexer/chars/byte_kind.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const BYTE_KIND_LUT: [ByteKind; 256] = [
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Utf8CharSink` is never constructed
[INFO] [stdout]  --> src/read/lexer/chars/utf8_char_sink.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Utf8CharSink {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `push` are never used
[INFO] [stdout]   --> src/read/lexer/chars/utf8_char_sink.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Utf8CharSink {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Utf8CharSink {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn push(&mut self, b: u8) -> Option<Result<char, Error>> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnexpectedByte` is never constructed
[INFO] [stdout]    --> src/read/lexer/chars/utf8_char_sink.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 102 | pub enum Error {
[INFO] [stdout]     |          ----- variant in this enum
[INFO] [stdout] 103 |     UnexpectedByte { expected: Expected, actual: u8 }
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `StartByte` and `ContByte` are never constructed
[INFO] [stdout]    --> src/read/lexer/chars/utf8_char_sink.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub enum Expected {
[INFO] [stdout]     |          -------- variants in this enum
[INFO] [stdout] 108 |     StartByte,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 109 |     ContByte
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expected` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/read/lexer/token.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LeftParen` and `RightParen` are never constructed
[INFO] [stdout]   --> src/read/lexer/token.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Token {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 11 |     LeftParen,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 12 |     RightParen
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `next` is never used
[INFO] [stdout]   --> src/read/lexer/token.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Token {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 16 |     pub fn next<R: Read>(source: &mut Chars<R>) -> Option<Result<Self>> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnexpectedChar` is never constructed
[INFO] [stdout]   --> src/read/lexer/token.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 30 |     UnexpectedChar(char),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "b66d6401454797e00a4723ab9b5272fc097618c5702cd19d07a46e8e48f7d114", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b66d6401454797e00a4723ab9b5272fc097618c5702cd19d07a46e8e48f7d114", kill_on_drop: false }`
[INFO] [stdout] b66d6401454797e00a4723ab9b5272fc097618c5702cd19d07a46e8e48f7d114
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ae0ce63286d410821b81a3e69e1d6ae774512fe69b78a77a48bf53363d12a32
[INFO] running `Command { std: "docker" "start" "-a" "5ae0ce63286d410821b81a3e69e1d6ae774512fe69b78a77a48bf53363d12a32", kill_on_drop: false }`
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]   --> src/read/lexer/mod.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Lexer<R: Read> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/read/lexer/mod.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn lexer<R: Read>(source: R) -> Lexer<R> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chars` is never constructed
[INFO] [stdout]   --> src/read/lexer/chars/mod.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Chars<R: Read> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chars` is never used
[INFO] [stdout]   --> src/read/lexer/chars/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn chars<R: Read>(r: R) -> Chars<R> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Eof` is never constructed
[INFO] [stdout]   --> src/read/lexer/chars/mod.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 65 |     Eof
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ByteKind` is never used
[INFO] [stdout]  --> src/read/lexer/chars/byte_kind.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum ByteKind {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `of` is never used
[INFO] [stdout]   --> src/read/lexer/chars/byte_kind.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl ByteKind {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 12 |     pub fn of(b: u8) -> ByteKind {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BYTE_KIND_LUT` is never used
[INFO] [stdout]   --> src/read/lexer/chars/byte_kind.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const BYTE_KIND_LUT: [ByteKind; 256] = [
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Utf8CharSink` is never constructed
[INFO] [stdout]  --> src/read/lexer/chars/utf8_char_sink.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Utf8CharSink {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `push` are never used
[INFO] [stdout]   --> src/read/lexer/chars/utf8_char_sink.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Utf8CharSink {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Utf8CharSink {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn push(&mut self, b: u8) -> Option<Result<char, Error>> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnexpectedByte` is never constructed
[INFO] [stdout]    --> src/read/lexer/chars/utf8_char_sink.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 102 | pub enum Error {
[INFO] [stdout]     |          ----- variant in this enum
[INFO] [stdout] 103 |     UnexpectedByte { expected: Expected, actual: u8 }
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `StartByte` and `ContByte` are never constructed
[INFO] [stdout]    --> src/read/lexer/chars/utf8_char_sink.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub enum Expected {
[INFO] [stdout]     |          -------- variants in this enum
[INFO] [stdout] 108 |     StartByte,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 109 |     ContByte
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expected` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/read/lexer/token.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LeftParen` and `RightParen` are never constructed
[INFO] [stdout]   --> src/read/lexer/token.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Token {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 11 |     LeftParen,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 12 |     RightParen
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `next` is never used
[INFO] [stdout]   --> src/read/lexer/token.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Token {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 16 |     pub fn next<R: Read>(source: &mut Chars<R>) -> Option<Result<Self>> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnexpectedChar` is never constructed
[INFO] [stdout]   --> src/read/lexer/token.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 30 |     UnexpectedChar(char),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tryst v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "5ae0ce63286d410821b81a3e69e1d6ae774512fe69b78a77a48bf53363d12a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ae0ce63286d410821b81a3e69e1d6ae774512fe69b78a77a48bf53363d12a32", kill_on_drop: false }`
[INFO] [stdout] 5ae0ce63286d410821b81a3e69e1d6ae774512fe69b78a77a48bf53363d12a32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4f577ea78e6db57c48d7886ba3d9efc3c1752d0db9d25bdc908929974b8e0373
[INFO] running `Command { std: "docker" "start" "-a" "4f577ea78e6db57c48d7886ba3d9efc3c1752d0db9d25bdc908929974b8e0373", kill_on_drop: false }`
[INFO] [stderr] warning: struct `Lexer` is never constructed
[INFO] [stderr]   --> src/read/lexer/mod.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Lexer<R: Read> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `lexer` is never used
[INFO] [stderr]   --> src/read/lexer/mod.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn lexer<R: Read>(source: R) -> Lexer<R> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Chars` is never constructed
[INFO] [stderr]   --> src/read/lexer/chars/mod.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct Chars<R: Read> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `chars` is never used
[INFO] [stderr]   --> src/read/lexer/chars/mod.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn chars<R: Read>(r: R) -> Chars<R> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Eof` is never constructed
[INFO] [stderr]   --> src/read/lexer/chars/mod.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub enum Error {
[INFO] [stderr]    |          ----- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 65 |     Eof
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: enum `ByteKind` is never used
[INFO] [stderr]  --> src/read/lexer/chars/byte_kind.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub enum ByteKind {
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `of` is never used
[INFO] [stderr]   --> src/read/lexer/chars/byte_kind.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl ByteKind {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 12 |     pub fn of(b: u8) -> ByteKind {
[INFO] [stderr]    |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `BYTE_KIND_LUT` is never used
[INFO] [stderr]   --> src/read/lexer/chars/byte_kind.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 | const BYTE_KIND_LUT: [ByteKind; 256] = [
[INFO] [stderr]    |       ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Utf8CharSink` is never constructed
[INFO] [stderr]  --> src/read/lexer/chars/utf8_char_sink.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Utf8CharSink {
[INFO] [stderr]   |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `push` are never used
[INFO] [stderr]   --> src/read/lexer/chars/utf8_char_sink.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl Utf8CharSink {
[INFO] [stderr]    | ----------------- associated items in this implementation
[INFO] [stderr] 13 |     pub fn new() -> Utf8CharSink {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 17 |     pub fn push(&mut self, b: u8) -> Option<Result<char, Error>> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `UnexpectedByte` is never constructed
[INFO] [stderr]    --> src/read/lexer/chars/utf8_char_sink.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 102 | pub enum Error {
[INFO] [stderr]     |          ----- variant in this enum
[INFO] [stderr] 103 |     UnexpectedByte { expected: Expected, actual: u8 }
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Error` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `StartByte` and `ContByte` are never constructed
[INFO] [stderr]    --> src/read/lexer/chars/utf8_char_sink.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 107 | pub enum Expected {
[INFO] [stderr]     |          -------- variants in this enum
[INFO] [stderr] 108 |     StartByte,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 109 |     ContByte
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Expected` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Result` is never used
[INFO] [stderr]  --> src/read/lexer/token.rs:7:6
[INFO] [stderr]   |
[INFO] [stderr] 7 | type Result<T> = std::result::Result<T, Error>;
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `LeftParen` and `RightParen` are never constructed
[INFO] [stderr]   --> src/read/lexer/token.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub enum Token {
[INFO] [stderr]    |          ----- variants in this enum
[INFO] [stderr] 11 |     LeftParen,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 12 |     RightParen
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Token` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `next` is never used
[INFO] [stderr]   --> src/read/lexer/token.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | impl Token {
[INFO] [stderr]    | ---------- associated function in this implementation
[INFO] [stderr] 16 |     pub fn next<R: Read>(source: &mut Chars<R>) -> Option<Result<Self>> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `UnexpectedChar` is never constructed
[INFO] [stderr]   --> src/read/lexer/token.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub enum Error {
[INFO] [stderr]    |          ----- variant in this enum
[INFO] [stderr] 30 |     UnexpectedChar(char),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `tryst` (lib) generated 16 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tryst-0f9294744d3103b2)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test read::lexer::chars::tests::test_mid_char_eof ... ok
[INFO] [stdout] test read::lexer::chars::tests::test_unicode ... ok
[INFO] [stdout] test read::lexer::chars::utf8_char_sink::tests::test_invalid_cont ... ok
[INFO] [stdout] test read::lexer::chars::utf8_char_sink::tests::test_invalid_start ... ok
[INFO] [stdout] test read::lexer::chars::utf8_char_sink::tests::test_three_bytes ... ok
[INFO] [stdout] test read::lexer::chars::utf8_char_sink::tests::test_two_bytes ... ok
[INFO] [stdout] test read::lexer::tests::test_empty ... ok
[INFO] [stdout] test read::lexer::tests::test_parens ... ok
[INFO] [stdout] test read::lexer::chars::utf8_char_sink::tests::test_four_bytes ... ok
[INFO] [stdout] test read::lexer::chars::tests::test_ascii ... ok
[INFO] [stdout] test read::lexer::chars::utf8_char_sink::tests::test_ascii ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/cli.rs (/opt/rustwide/target/debug/deps/tryst-bb27aacd7a8212d5)
[INFO] [stderr]    Doc-tests tryst
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4f577ea78e6db57c48d7886ba3d9efc3c1752d0db9d25bdc908929974b8e0373", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f577ea78e6db57c48d7886ba3d9efc3c1752d0db9d25bdc908929974b8e0373", kill_on_drop: false }`
[INFO] [stdout] 4f577ea78e6db57c48d7886ba3d9efc3c1752d0db9d25bdc908929974b8e0373
