Dec 19 12:18:01.559 INFO checking mrozycki/rust-fst against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:18:01.559 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mrozycki/rust-fst:/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=forbid" "-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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:18:01.810 INFO [stdout] e51fac97172588f39354f54c34ca7b14d7cd4dcaeba5a2d27f9d30188d67a9fd
Dec 19 12:18:01.812 INFO running `"docker" "start" "-a" "e51fac97172588f39354f54c34ca7b14d7cd4dcaeba5a2d27f9d30188d67a9fd"`
Dec 19 12:18:02.673 INFO [stderr]     Checking rust-fst v0.1.0 (/opt/crater/workdir)
Dec 19 12:18:02.903 INFO [stderr] warning: method is never used: `empty`
Dec 19 12:18:02.903 INFO [stderr]   --> src/fst.rs:36:5
Dec 19 12:18:02.903 INFO [stderr]    |
Dec 19 12:18:02.903 INFO [stderr] 36 |     pub fn empty() -> Self {
Dec 19 12:18:02.903 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.904 INFO [stderr]    |
Dec 19 12:18:02.904 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 12:18:02.904 INFO [stderr] 
Dec 19 12:18:02.904 INFO [stderr] warning: method is never used: `string`
Dec 19 12:18:02.904 INFO [stderr]   --> src/fst.rs:60:5
Dec 19 12:18:02.904 INFO [stderr]    |
Dec 19 12:18:02.904 INFO [stderr] 60 |     pub fn string(s: &str) -> Self {
Dec 19 12:18:02.904 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.904 INFO [stderr] 
Dec 19 12:18:02.904 INFO [stderr] warning: method is never used: `and`
Dec 19 12:18:02.904 INFO [stderr]   --> src/fst.rs:83:5
Dec 19 12:18:02.904 INFO [stderr]    |
Dec 19 12:18:02.904 INFO [stderr] 83 |     pub fn and(m1: Self, m2: Self) -> Self {
Dec 19 12:18:02.904 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.904 INFO [stderr] 
Dec 19 12:18:02.909 INFO [stderr] warning: method is never used: `and_optionally`
Dec 19 12:18:02.909 INFO [stderr]   --> src/fst.rs:97:5
Dec 19 12:18:02.909 INFO [stderr]    |
Dec 19 12:18:02.909 INFO [stderr] 97 |     pub fn and_optionally(m1: Self, m2: Self) -> Self {
Dec 19 12:18:02.909 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.909 INFO [stderr] 
Dec 19 12:18:02.909 INFO [stderr] warning: method is never used: `repeated`
Dec 19 12:18:02.909 INFO [stderr]    --> src/fst.rs:159:5
Dec 19 12:18:02.909 INFO [stderr]     |
Dec 19 12:18:02.909 INFO [stderr] 159 |     pub fn repeated(mut m: Self) -> Self {
Dec 19 12:18:02.909 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.909 INFO [stderr] 
Dec 19 12:18:02.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:18:02.914 INFO [stderr]    --> src/fst.rs:217:9
Dec 19 12:18:02.914 INFO [stderr]     |
Dec 19 12:18:02.914 INFO [stderr] 217 |         writeln!(f, "{} {}", self.state_count, self.transitions.len());
Dec 19 12:18:02.914 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.914 INFO [stderr]     |
Dec 19 12:18:02.914 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 12:18:02.914 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:18:02.914 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:18:02.914 INFO [stderr] 
Dec 19 12:18:02.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:18:02.914 INFO [stderr]    --> src/fst.rs:219:13
Dec 19 12:18:02.914 INFO [stderr]     |
Dec 19 12:18:02.914 INFO [stderr] 219 |             writeln!(f, "{}\t{}\t{}\t{}", t.from, t.to, t.on.unwrap_or('`'), t.with.unwrap_or_default());
Dec 19 12:18:02.914 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.914 INFO [stderr]     |
Dec 19 12:18:02.914 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:18:02.914 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:18:02.914 INFO [stderr] 
Dec 19 12:18:02.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:18:02.914 INFO [stderr]    --> src/fst.rs:223:13
Dec 19 12:18:02.914 INFO [stderr]     |
Dec 19 12:18:02.915 INFO [stderr] 223 |             write!(f, "{} ", state);
Dec 19 12:18:02.915 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.915 INFO [stderr]     |
Dec 19 12:18:02.915 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:18:02.915 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:18:02.915 INFO [stderr] 
Dec 19 12:18:02.927 INFO [stderr] warning: method is never used: `empty`
Dec 19 12:18:02.927 INFO [stderr]   --> src/fst.rs:36:5
Dec 19 12:18:02.927 INFO [stderr]    |
Dec 19 12:18:02.927 INFO [stderr] 36 |     pub fn empty() -> Self {
Dec 19 12:18:02.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.927 INFO [stderr]    |
Dec 19 12:18:02.927 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 12:18:02.927 INFO [stderr] 
Dec 19 12:18:02.927 INFO [stderr] warning: method is never used: `string`
Dec 19 12:18:02.927 INFO [stderr]   --> src/fst.rs:60:5
Dec 19 12:18:02.927 INFO [stderr]    |
Dec 19 12:18:02.927 INFO [stderr] 60 |     pub fn string(s: &str) -> Self {
Dec 19 12:18:02.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.927 INFO [stderr] 
Dec 19 12:18:02.927 INFO [stderr] warning: method is never used: `and`
Dec 19 12:18:02.927 INFO [stderr]   --> src/fst.rs:83:5
Dec 19 12:18:02.927 INFO [stderr]    |
Dec 19 12:18:02.927 INFO [stderr] 83 |     pub fn and(m1: Self, m2: Self) -> Self {
Dec 19 12:18:02.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.927 INFO [stderr] 
Dec 19 12:18:02.927 INFO [stderr] warning: method is never used: `and_optionally`
Dec 19 12:18:02.927 INFO [stderr]   --> src/fst.rs:97:5
Dec 19 12:18:02.927 INFO [stderr]    |
Dec 19 12:18:02.927 INFO [stderr] 97 |     pub fn and_optionally(m1: Self, m2: Self) -> Self {
Dec 19 12:18:02.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.927 INFO [stderr] 
Dec 19 12:18:02.927 INFO [stderr] warning: method is never used: `repeated`
Dec 19 12:18:02.927 INFO [stderr]    --> src/fst.rs:159:5
Dec 19 12:18:02.927 INFO [stderr]     |
Dec 19 12:18:02.927 INFO [stderr] 159 |     pub fn repeated(mut m: Self) -> Self {
Dec 19 12:18:02.927 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.927 INFO [stderr] 
Dec 19 12:18:02.936 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:18:02.936 INFO [stderr]    --> src/fst.rs:217:9
Dec 19 12:18:02.936 INFO [stderr]     |
Dec 19 12:18:02.936 INFO [stderr] 217 |         writeln!(f, "{} {}", self.state_count, self.transitions.len());
Dec 19 12:18:02.936 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.936 INFO [stderr]     |
Dec 19 12:18:02.936 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 12:18:02.936 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:18:02.936 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:18:02.936 INFO [stderr] 
Dec 19 12:18:02.936 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:18:02.936 INFO [stderr]    --> src/fst.rs:219:13
Dec 19 12:18:02.936 INFO [stderr]     |
Dec 19 12:18:02.936 INFO [stderr] 219 |             writeln!(f, "{}\t{}\t{}\t{}", t.from, t.to, t.on.unwrap_or('`'), t.with.unwrap_or_default());
Dec 19 12:18:02.936 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.936 INFO [stderr]     |
Dec 19 12:18:02.936 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:18:02.936 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:18:02.936 INFO [stderr] 
Dec 19 12:18:02.936 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:18:02.936 INFO [stderr]    --> src/fst.rs:223:13
Dec 19 12:18:02.936 INFO [stderr]     |
Dec 19 12:18:02.936 INFO [stderr] 223 |             write!(f, "{} ", state);
Dec 19 12:18:02.936 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:18:02.936 INFO [stderr]     |
Dec 19 12:18:02.936 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:18:02.936 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:18:02.937 INFO [stderr] 
Dec 19 12:18:02.953 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
Dec 19 12:18:03.218 INFO running `"docker" "inspect" "e51fac97172588f39354f54c34ca7b14d7cd4dcaeba5a2d27f9d30188d67a9fd"`
Dec 19 12:18:03.334 INFO running `"docker" "rm" "-f" "e51fac97172588f39354f54c34ca7b14d7cd4dcaeba5a2d27f9d30188d67a9fd"`
Dec 19 12:18:03.430 INFO [stdout] e51fac97172588f39354f54c34ca7b14d7cd4dcaeba5a2d27f9d30188d67a9fd