[INFO] fetching crate palindromeda 2.1.0...
[INFO] testing palindromeda-2.1.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate palindromeda 2.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate palindromeda 2.1.0
[INFO] finished tweaking crates.io crate palindromeda 2.1.0
[INFO] tweaked toml for crates.io crate palindromeda 2.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate palindromeda 2.1.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate palindromeda 2.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded forward_ref v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4ae5a23563df48072c8d604090ab2baca280e8163c35a971f5f33d1baba82e2
[INFO] running `Command { std: "docker" "start" "-a" "f4ae5a23563df48072c8d604090ab2baca280e8163c35a971f5f33d1baba82e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4ae5a23563df48072c8d604090ab2baca280e8163c35a971f5f33d1baba82e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4ae5a23563df48072c8d604090ab2baca280e8163c35a971f5f33d1baba82e2", kill_on_drop: false }`
[INFO] [stdout] f4ae5a23563df48072c8d604090ab2baca280e8163c35a971f5f33d1baba82e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae3354c6f0258d77d9226cfe1b0d1ecbed907cf25f826c53d29e3fdf87051463
[INFO] running `Command { std: "docker" "start" "-a" "ae3354c6f0258d77d9226cfe1b0d1ecbed907cf25f826c53d29e3fdf87051463", kill_on_drop: false }`
[INFO] [stderr]    Compiling forward_ref v1.0.0
[INFO] [stderr]    Compiling palindromeda v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]   --> src/lib.rs:87:14
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl PalindromeDigits {
[INFO] [stdout]    | --------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     const fn from(mut x: u64) -> Self {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "ae3354c6f0258d77d9226cfe1b0d1ecbed907cf25f826c53d29e3fdf87051463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae3354c6f0258d77d9226cfe1b0d1ecbed907cf25f826c53d29e3fdf87051463", kill_on_drop: false }`
[INFO] [stdout] ae3354c6f0258d77d9226cfe1b0d1ecbed907cf25f826c53d29e3fdf87051463
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6881afd36ab1bf6a2c634e27045c23c122029662148dc1c12460604702569098
[INFO] running `Command { std: "docker" "start" "-a" "6881afd36ab1bf6a2c634e27045c23c122029662148dc1c12460604702569098", kill_on_drop: false }`
[INFO] [stderr]    Compiling palindromeda v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]   --> src/lib.rs:87:14
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl PalindromeDigits {
[INFO] [stdout]    | --------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     const fn from(mut x: u64) -> Self {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "6881afd36ab1bf6a2c634e27045c23c122029662148dc1c12460604702569098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6881afd36ab1bf6a2c634e27045c23c122029662148dc1c12460604702569098", kill_on_drop: false }`
[INFO] [stdout] 6881afd36ab1bf6a2c634e27045c23c122029662148dc1c12460604702569098
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 023b90dd488a3db7aa119dbcb4cb4601a72822be2c9d1acbf4dba7e7124140fb
[INFO] running `Command { std: "docker" "start" "-a" "023b90dd488a3db7aa119dbcb4cb4601a72822be2c9d1acbf4dba7e7124140fb", kill_on_drop: false }`
[INFO] [stderr] warning: associated function `from` is never used
[INFO] [stderr]   --> src/lib.rs:87:14
[INFO] [stderr]    |
[INFO] [stderr] 82 | impl PalindromeDigits {
[INFO] [stderr]    | --------------------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 87 |     const fn from(mut x: u64) -> Self {
[INFO] [stderr]    |              ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `palindromeda` (lib) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/palindromeda-120b3702845f0e5a)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test tests::test_palindrome_closest ... ok
[INFO] [stdout] test tests::test_palindrome_ge ... ok
[INFO] [stdout] test tests::test_palindrome_next ... ok
[INFO] [stdout] test tests::test_palindrome_le ... ok
[INFO] [stdout] test tests::test_palindrome_construct ... ok
[INFO] [stdout] test tests::test_palindrome_previous ... ok
[INFO] [stdout] test tests::test_palindromeiter_first_n_palindromes ... ok
[INFO] [stdout] test tests::test_palindromeiter_iterate ... ok
[INFO] [stdout] test tests::test_palindromeiter_first_n_palindromes_from ... ok
[INFO] [stdout] test tests::test_palindromeiter_len ... ok
[INFO] [stdout] test tests::test_palindromeiter_iterate_rev ... ok
[INFO] [stdout] test tests::test_palindrome_construct_panic_on_too_short_length - should panic ... ok
[INFO] [stdout] test tests::test_palindrome_construct_panic_on_too_big_length - should panic ... ok
[INFO] [stdout] test tests::test_palindrome_nth ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests palindromeda
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 28) ... ok
[INFO] [stdout] test src/lib.rs - (line 8) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "023b90dd488a3db7aa119dbcb4cb4601a72822be2c9d1acbf4dba7e7124140fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "023b90dd488a3db7aa119dbcb4cb4601a72822be2c9d1acbf4dba7e7124140fb", kill_on_drop: false }`
[INFO] [stdout] 023b90dd488a3db7aa119dbcb4cb4601a72822be2c9d1acbf4dba7e7124140fb