[INFO] cloning repository https://github.com/giraffate/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/giraffate/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgiraffate%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgiraffate%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2177c9ef54797c4b28618a096665069b5df9d865
[INFO] checking giraffate/rlox against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgiraffate%2Frlox" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/giraffate/rlox on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/giraffate/rlox
[INFO] finished tweaking git repo https://github.com/giraffate/rlox
[INFO] tweaked toml for git repo https://github.com/giraffate/rlox written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/giraffate/rlox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1f89a3b912e07987f246b66ae56ea5c40a8435dcfa651c590cf6f9bd4277e57
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b1f89a3b912e07987f246b66ae56ea5c40a8435dcfa651c590cf6f9bd4277e57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1f89a3b912e07987f246b66ae56ea5c40a8435dcfa651c590cf6f9bd4277e57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1f89a3b912e07987f246b66ae56ea5c40a8435dcfa651c590cf6f9bd4277e57", kill_on_drop: false }`
[INFO] [stdout] b1f89a3b912e07987f246b66ae56ea5c40a8435dcfa651c590cf6f9bd4277e57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 22cdc02f7b69a871009160da879149497f8ed9da3280e142b00e5147529b6dc7
[INFO] running `Command { std: "docker" "start" "-a" "22cdc02f7b69a871009160da879149497f8ed9da3280e142b00e5147529b6dc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.23
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking os_str_bytes v2.3.2
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `source`
[INFO] [stdout]   --> src/scanner.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     source: Vec<char>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tokens`
[INFO] [stdout]   --> src/scanner.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     tokens: Vec<Token>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `start`
[INFO] [stdout]   --> src/scanner.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     start: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `current`
[INFO] [stdout]   --> src/scanner.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     current: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `line`
[INFO] [stdout]   --> src/scanner.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     line: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_tokens`
[INFO] [stdout]   --> src/scanner.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn scan_tokens(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_token`
[INFO] [stdout]   --> src/scanner.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn scan_token(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `advance`
[INFO] [stdout]    --> src/scanner.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn advance(&mut self) -> char {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_token`
[INFO] [stdout]    --> src/scanner.rs:129:8
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn add_token(&mut self, token_type: TokenType, lit: Option<String>) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_at_end`
[INFO] [stdout]    --> src/scanner.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout] 139 |     fn is_at_end(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_match`
[INFO] [stdout]    --> src/scanner.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn is_match(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]    --> src/scanner.rs:154:8
[INFO] [stdout]     |
[INFO] [stdout] 154 |     fn peek(&self) -> char {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_next`
[INFO] [stdout]    --> src/scanner.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 |     fn peek_next(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `string`
[INFO] [stdout]    --> src/scanner.rs:170:8
[INFO] [stdout]     |
[INFO] [stdout] 170 |     fn string(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `number`
[INFO] [stdout]    --> src/scanner.rs:192:8
[INFO] [stdout]     |
[INFO] [stdout] 192 |     fn number(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `identifier`
[INFO] [stdout]    --> src/scanner.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn identifier(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_digit`
[INFO] [stdout]    --> src/scanner.rs:221:4
[INFO] [stdout]     |
[INFO] [stdout] 221 | fn is_digit(c: char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_alpha`
[INFO] [stdout]    --> src/scanner.rs:225:4
[INFO] [stdout]     |
[INFO] [stdout] 225 | fn is_alpha(c: char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_alpha_number`
[INFO] [stdout]    --> src/scanner.rs:229:4
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn is_alpha_number(c: char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_tokens`
[INFO] [stdout]   --> src/scanner.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn scan_tokens(&mut self) {
[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: `scan_token`
[INFO] [stdout]   --> src/scanner.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn scan_token(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `identifier`
[INFO] [stdout]    --> src/scanner.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn identifier(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_alpha`
[INFO] [stdout]    --> src/scanner.rs:225:4
[INFO] [stdout]     |
[INFO] [stdout] 225 | fn is_alpha(c: char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_alpha_number`
[INFO] [stdout]    --> src/scanner.rs:229:4
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn is_alpha_number(c: char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.09s
[INFO] running `Command { std: "docker" "inspect" "22cdc02f7b69a871009160da879149497f8ed9da3280e142b00e5147529b6dc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22cdc02f7b69a871009160da879149497f8ed9da3280e142b00e5147529b6dc7", kill_on_drop: false }`
[INFO] [stdout] 22cdc02f7b69a871009160da879149497f8ed9da3280e142b00e5147529b6dc7