[INFO] fetching crate shared-string 0.1.7...
[INFO] checking shared-string-0.1.7 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate shared-string 0.1.7 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate shared-string 0.1.7 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shared-string 0.1.7
[INFO] finished tweaking crates.io crate shared-string 0.1.7
[INFO] tweaked toml for crates.io crate shared-string 0.1.7 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 61 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8be95a821fa419bbbb3a146a902f2fc38f90b6949cf299950417f4920e484ba
[INFO] running `Command { std: "docker" "start" "-a" "a8be95a821fa419bbbb3a146a902f2fc38f90b6949cf299950417f4920e484ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8be95a821fa419bbbb3a146a902f2fc38f90b6949cf299950417f4920e484ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8be95a821fa419bbbb3a146a902f2fc38f90b6949cf299950417f4920e484ba", kill_on_drop: false }`
[INFO] [stdout] a8be95a821fa419bbbb3a146a902f2fc38f90b6949cf299950417f4920e484ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1484b5c6b3e0111d2564a4fc572a9adf7920fd4d6cb7676ead154a968dde3570
[INFO] running `Command { std: "docker" "start" "-a" "1484b5c6b3e0111d2564a4fc572a9adf7920fd4d6cb7676ead154a968dde3570", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking shared-string v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: fields `firstname`, `middlename`, and `lastname` are never read
[INFO] [stdout]   --> benches/main_example.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct NameString {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 14 |     pub firstname: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 15 |     pub middlename: String,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 16 |     pub lastname: String
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `firstname`, `middlename`, and `lastname` are never read
[INFO] [stdout]   --> benches/main_example.rs:31:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct NameShared {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     pub firstname: SharedString,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 32 |     pub middlename: SharedString,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 33 |     pub lastname: SharedString
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.01s
[INFO] running `Command { std: "docker" "inspect" "1484b5c6b3e0111d2564a4fc572a9adf7920fd4d6cb7676ead154a968dde3570", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1484b5c6b3e0111d2564a4fc572a9adf7920fd4d6cb7676ead154a968dde3570", kill_on_drop: false }`
[INFO] [stdout] 1484b5c6b3e0111d2564a4fc572a9adf7920fd4d6cb7676ead154a968dde3570
[INFO] checking shared-string-0.1.7 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate shared-string 0.1.7 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate shared-string 0.1.7 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shared-string 0.1.7
[INFO] finished tweaking crates.io crate shared-string 0.1.7
[INFO] tweaked toml for crates.io crate shared-string 0.1.7 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 61 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67d3c123c858d8d97fdbfd184ee05151e5996a1c7797231f42cbb57ef8dca985
[INFO] running `Command { std: "docker" "start" "-a" "67d3c123c858d8d97fdbfd184ee05151e5996a1c7797231f42cbb57ef8dca985", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67d3c123c858d8d97fdbfd184ee05151e5996a1c7797231f42cbb57ef8dca985", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67d3c123c858d8d97fdbfd184ee05151e5996a1c7797231f42cbb57ef8dca985", kill_on_drop: false }`
[INFO] [stdout] 67d3c123c858d8d97fdbfd184ee05151e5996a1c7797231f42cbb57ef8dca985
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d90d7f96bdcb7fe8a5a939162d14d48c839666bc99af4f1f9605cd3bf8b9719
[INFO] running `Command { std: "docker" "start" "-a" "8d90d7f96bdcb7fe8a5a939162d14d48c839666bc99af4f1f9605cd3bf8b9719", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking shared-string v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: fields `firstname`, `middlename`, and `lastname` are never read
[INFO] [stdout]   --> benches/main_example.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct NameString {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 14 |     pub firstname: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 15 |     pub middlename: String,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 16 |     pub lastname: String
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `firstname`, `middlename`, and `lastname` are never read
[INFO] [stdout]   --> benches/main_example.rs:31:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct NameShared {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     pub firstname: SharedString,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 32 |     pub middlename: SharedString,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 33 |     pub lastname: SharedString
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.38s
[INFO] running `Command { std: "docker" "inspect" "8d90d7f96bdcb7fe8a5a939162d14d48c839666bc99af4f1f9605cd3bf8b9719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d90d7f96bdcb7fe8a5a939162d14d48c839666bc99af4f1f9605cd3bf8b9719", kill_on_drop: false }`
[INFO] [stdout] 8d90d7f96bdcb7fe8a5a939162d14d48c839666bc99af4f1f9605cd3bf8b9719