[INFO] crate rflex 0.5.0 is already in cache
[INFO] extracting crate rflex 0.5.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rflex/0.5.0
[INFO] extracting crate rflex 0.5.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rflex/0.5.0
[INFO] validating manifest of rflex-0.5.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rflex-0.5.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rflex-0.5.0
[INFO] finished frobbing rflex-0.5.0
[INFO] frobbed toml for rflex-0.5.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rflex/0.5.0/Cargo.toml
[INFO] started frobbing rflex-0.5.0
[INFO] finished frobbing rflex-0.5.0
[INFO] frobbed toml for rflex-0.5.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rflex/0.5.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] testing rflex-0.5.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rflex/0.5.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] acbacd2ac432dd51a8c0c973e61a96417cccc66574fb15a097cfc9bb11e944d7
[INFO] running `"docker" "start" "-a" "acbacd2ac432dd51a8c0c973e61a96417cccc66574fb15a097cfc9bb11e944d7"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] Compiling liquid-error v0.16.1
[INFO] [stderr] Compiling liquid-value v0.17.1
[INFO] [stderr] Compiling liquid-interpreter v0.17.1
[INFO] [stderr] Compiling liquid-compiler v0.17.1
[INFO] [stderr] Compiling liquid v0.17.1
[INFO] [stderr] Compiling rflex v0.5.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr] --> src/error.rs:29:32
[INFO] [stderr] |
[INFO] [stderr] 29 | fn cause(&self) -> Option<&Fail> {
[INFO] [stderr] | ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stderr] |
[INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `set_end`
[INFO] [stderr] --> src/charclasses.rs:22:5
[INFO] [stderr] |
[INFO] [stderr] 22 | pub fn set_end(&mut self, end: usize) {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] |
[INFO] [stderr] = note: `#[warn(dead_code)]` on by default
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `set_start`
[INFO] [stderr] --> src/charclasses.rs:26:5
[INFO] [stderr] |
[INFO] [stderr] 26 | pub fn set_start(&mut self, start: usize) {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `add_char`
[INFO] [stderr] --> src/charclasses.rs:155:5
[INFO] [stderr] |
[INFO] [stderr] 155 | pub fn add_char(&mut self, c: usize) {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `get_max_char_code`
[INFO] [stderr] --> src/charclasses.rs:396:5
[INFO] [stderr] |
[INFO] [stderr] 396 | pub fn get_max_char_code(&self) -> usize {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `set_max_char_code`
[INFO] [stderr] --> src/charclasses.rs:400:5
[INFO] [stderr] |
[INFO] [stderr] 400 | pub fn set_max_char_code(&mut self, max_char_code: usize) {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `to_string_i`
[INFO] [stderr] --> src/charclasses.rs:511:5
[INFO] [stderr] |
[INFO] [stderr] 511 | pub fn to_string_i(&self, index: usize) -> String {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `write_dot`
[INFO] [stderr] --> src/dfa.rs:480:5
[INFO] [stderr] |
[INFO] [stderr] 480 | pub fn write_dot(&self) -> String {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `dump`
[INFO] [stderr] --> src/dfa.rs:503:5
[INFO] [stderr] |
[INFO] [stderr] 503 | pub fn dump(&self) -> String {
[INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]
[INFO] [stderr] warning: method is never used: `dump_epsilon`
[INFO] [stderr] --> src/nfa.rs:528:5
[INFO] [stderr] |
[INFO] [stderr] 528 | fn dump_epsilon(&self, epsilon: Vec