[INFO] fetching crate levenshtein_automata 0.2.1...
[INFO] testing levenshtein_automata-0.2.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate levenshtein_automata 0.2.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate levenshtein_automata 0.2.1
[INFO] finished tweaking crates.io crate levenshtein_automata 0.2.1
[INFO] tweaked toml for crates.io crate levenshtein_automata 0.2.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate levenshtein_automata 0.2.1 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded levenshtein v1.0.5
[INFO] [stderr]   Downloaded fst v0.4.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce0bad2941c36960613cb977b41414183a1fb110701c701c37d2eb7f6b2e908c
[INFO] running `Command { std: "docker" "start" "-a" "ce0bad2941c36960613cb977b41414183a1fb110701c701c37d2eb7f6b2e908c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce0bad2941c36960613cb977b41414183a1fb110701c701c37d2eb7f6b2e908c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce0bad2941c36960613cb977b41414183a1fb110701c701c37d2eb7f6b2e908c", kill_on_drop: false }`
[INFO] [stdout] ce0bad2941c36960613cb977b41414183a1fb110701c701c37d2eb7f6b2e908c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 62b7d61b7fb2655072303f3f30a5d8442171fe62f05daabe001721b4689b34be
[INFO] running `Command { std: "docker" "start" "-a" "62b7d61b7fb2655072303f3f30a5d8442171fe62f05daabe001721b4689b34be", kill_on_drop: false }`
[INFO] [stderr]    Compiling levenshtein_automata v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/alphabet.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn iter(&self) -> slice::Iter<(char, FullCharacteristicVector)> {
[INFO] [stdout]    |                 ^^^^^     --------------------------------------------- the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn iter(&self) -> slice::Iter<'_, (char, FullCharacteristicVector)> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/dfa.rs:228:9
[INFO] [stdout]     |
[INFO] [stdout] 228 |         &mut self,
[INFO] [stdout]     |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 232 |     ) -> Utf8DFAStateBuilder {
[INFO] [stdout]     |          ------------------- the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 232 |     ) -> Utf8DFAStateBuilder<'_> {
[INFO] [stdout]     |                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "62b7d61b7fb2655072303f3f30a5d8442171fe62f05daabe001721b4689b34be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62b7d61b7fb2655072303f3f30a5d8442171fe62f05daabe001721b4689b34be", kill_on_drop: false }`
[INFO] [stdout] 62b7d61b7fb2655072303f3f30a5d8442171fe62f05daabe001721b4689b34be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f695d41a7c7187ddf45127af242ba54d2a632116ba20c4a1b9736c367bf88908
[INFO] running `Command { std: "docker" "start" "-a" "f695d41a7c7187ddf45127af242ba54d2a632116ba20c4a1b9736c367bf88908", kill_on_drop: false }`
[INFO] [stderr]    Compiling levenshtein v1.0.5
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/alphabet.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn iter(&self) -> slice::Iter<(char, FullCharacteristicVector)> {
[INFO] [stdout]    |                 ^^^^^     --------------------------------------------- the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn iter(&self) -> slice::Iter<'_, (char, FullCharacteristicVector)> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/dfa.rs:228:9
[INFO] [stdout]     |
[INFO] [stdout] 228 |         &mut self,
[INFO] [stdout]     |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 232 |     ) -> Utf8DFAStateBuilder {
[INFO] [stdout]     |          ------------------- the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 232 |     ) -> Utf8DFAStateBuilder<'_> {
[INFO] [stdout]     |                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling levenshtein_automata v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:35:19
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `levenshtein_automata` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f695d41a7c7187ddf45127af242ba54d2a632116ba20c4a1b9736c367bf88908", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f695d41a7c7187ddf45127af242ba54d2a632116ba20c4a1b9736c367bf88908", kill_on_drop: false }`
[INFO] [stdout] f695d41a7c7187ddf45127af242ba54d2a632116ba20c4a1b9736c367bf88908