[INFO] fetching crate rflex 0.6.0...
[INFO] checking rflex-0.6.0 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate rflex 0.6.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rflex 0.6.0 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rflex 0.6.0
[INFO] finished tweaking crates.io crate rflex 0.6.0
[INFO] tweaked toml for crates.io crate rflex 0.6.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate rflex 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f1c54a83586a8860ed3dd8bf091449888ca2cf0ddbb286b8788a68787d66677
[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" "2f1c54a83586a8860ed3dd8bf091449888ca2cf0ddbb286b8788a68787d66677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f1c54a83586a8860ed3dd8bf091449888ca2cf0ddbb286b8788a68787d66677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f1c54a83586a8860ed3dd8bf091449888ca2cf0ddbb286b8788a68787d66677", kill_on_drop: false }`
[INFO] [stdout] 2f1c54a83586a8860ed3dd8bf091449888ca2cf0ddbb286b8788a68787d66677
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91e7b389b797ca67959f2f899c776667f55dc1715627ad9635040c60984b8698
[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" "91e7b389b797ca67959f2f899c776667f55dc1715627ad9635040c60984b8698", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking liquid-error v0.16.1
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking unicode-segmentation v1.2.1
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking backtrace-sys v0.1.29
[INFO] [stderr]     Checking backtrace v0.3.32
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking liquid-value v0.17.1
[INFO] [stderr]     Checking liquid-interpreter v0.17.1
[INFO] [stderr]     Checking liquid-compiler v0.17.1
[INFO] [stderr]     Checking liquid v0.17.1
[INFO] [stderr]     Checking rflex v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_end`
[INFO] [stdout]   --> src/charclasses.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn set_end(&mut self, end: usize) {
[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: `set_start`
[INFO] [stdout]   --> src/charclasses.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn set_start(&mut self, start: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_char`
[INFO] [stdout]    --> src/charclasses.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub fn add_char(&mut self, c: usize) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_max_char_code`
[INFO] [stdout]    --> src/charclasses.rs:396:12
[INFO] [stdout]     |
[INFO] [stdout] 396 |     pub fn get_max_char_code(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_max_char_code`
[INFO] [stdout]    --> src/charclasses.rs:400:12
[INFO] [stdout]     |
[INFO] [stdout] 400 |     pub fn set_max_char_code(&mut self, max_char_code: usize) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string_i`
[INFO] [stdout]    --> src/charclasses.rs:511:12
[INFO] [stdout]     |
[INFO] [stdout] 511 |     pub fn to_string_i(&self, index: usize) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_dot`
[INFO] [stdout]    --> src/dfa.rs:480:12
[INFO] [stdout]     |
[INFO] [stdout] 480 |     pub fn write_dot(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump`
[INFO] [stdout]    --> src/dfa.rs:503:12
[INFO] [stdout]     |
[INFO] [stdout] 503 |     pub fn dump(&self) -> String {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_epsilon`
[INFO] [stdout]    --> src/nfa.rs:528:8
[INFO] [stdout]     |
[INFO] [stdout] 528 |     fn dump_epsilon(&self, epsilon: Vec<Option<Rc<RefCell<FixedBitSet>>>>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/nfa.rs:527:12
[INFO] [stdout]     |
[INFO] [stdout] 527 |     #[warn(dead_code)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_fixedbit`
[INFO] [stdout]    --> src/nfa.rs:542:8
[INFO] [stdout]     |
[INFO] [stdout] 542 |     fn dump_fixedbit(&self, v: &FixedBitSet) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/nfa.rs:541:12
[INFO] [stdout]     |
[INFO] [stdout] 541 |     #[warn(dead_code)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_fixedbit_str`
[INFO] [stdout]    --> src/nfa.rs:546:8
[INFO] [stdout]     |
[INFO] [stdout] 546 |     fn dump_fixedbit_str(&self, v: &FixedBitSet) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_dot`
[INFO] [stdout]    --> src/nfa.rs:559:12
[INFO] [stdout]     |
[INFO] [stdout] 559 |     pub fn write_dot(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_table`
[INFO] [stdout]    --> src/nfa.rs:594:12
[INFO] [stdout]     |
[INFO] [stdout] 594 |     pub fn dump_table(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Name`
[INFO] [stdout]   --> src/scanner.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Name(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_char_classes`
[INFO] [stdout]    --> src/scanner.rs:354:12
[INFO] [stdout]     |
[INFO] [stdout] 354 |     pub fn get_char_classes(&self) -> CharClasses {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_regex`
[INFO] [stdout]    --> src/scanner.rs:584:4
[INFO] [stdout]     |
[INFO] [stdout] 584 | fn parse_regex(line_num: usize, line: &String) -> Result<(IR, String), TranslateError> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `num`
[INFO] [stdout]    --> src/scanner.rs:681:12
[INFO] [stdout]     |
[INFO] [stdout] 681 |     pub fn num(num: i32) -> Action {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_end`
[INFO] [stdout]   --> src/charclasses.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn set_end(&mut self, end: usize) {
[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: `set_start`
[INFO] [stdout]   --> src/charclasses.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn set_start(&mut self, start: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_max_char_code`
[INFO] [stdout]    --> src/charclasses.rs:396:12
[INFO] [stdout]     |
[INFO] [stdout] 396 |     pub fn get_max_char_code(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_max_char_code`
[INFO] [stdout]    --> src/charclasses.rs:400:12
[INFO] [stdout]     |
[INFO] [stdout] 400 |     pub fn set_max_char_code(&mut self, max_char_code: usize) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump`
[INFO] [stdout]    --> src/dfa.rs:503:12
[INFO] [stdout]     |
[INFO] [stdout] 503 |     pub fn dump(&self) -> String {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_epsilon`
[INFO] [stdout]    --> src/nfa.rs:528:8
[INFO] [stdout]     |
[INFO] [stdout] 528 |     fn dump_epsilon(&self, epsilon: Vec<Option<Rc<RefCell<FixedBitSet>>>>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/nfa.rs:527:12
[INFO] [stdout]     |
[INFO] [stdout] 527 |     #[warn(dead_code)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_fixedbit`
[INFO] [stdout]    --> src/nfa.rs:542:8
[INFO] [stdout]     |
[INFO] [stdout] 542 |     fn dump_fixedbit(&self, v: &FixedBitSet) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/nfa.rs:541:12
[INFO] [stdout]     |
[INFO] [stdout] 541 |     #[warn(dead_code)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_fixedbit_str`
[INFO] [stdout]    --> src/nfa.rs:546:8
[INFO] [stdout]     |
[INFO] [stdout] 546 |     fn dump_fixedbit_str(&self, v: &FixedBitSet) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump_table`
[INFO] [stdout]    --> src/nfa.rs:594:12
[INFO] [stdout]     |
[INFO] [stdout] 594 |     pub fn dump_table(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Name`
[INFO] [stdout]   --> src/scanner.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Name(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_char_classes`
[INFO] [stdout]    --> src/scanner.rs:354:12
[INFO] [stdout]     |
[INFO] [stdout] 354 |     pub fn get_char_classes(&self) -> CharClasses {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.80s
[INFO] running `Command { std: "docker" "inspect" "91e7b389b797ca67959f2f899c776667f55dc1715627ad9635040c60984b8698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91e7b389b797ca67959f2f899c776667f55dc1715627ad9635040c60984b8698", kill_on_drop: false }`
[INFO] [stdout] 91e7b389b797ca67959f2f899c776667f55dc1715627ad9635040c60984b8698