[INFO] fetching crate mkdosfs 0.2.5...
[INFO] checking mkdosfs-0.2.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate mkdosfs 0.2.5 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate mkdosfs 0.2.5 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 mkdosfs 0.2.5
[INFO] finished tweaking crates.io crate mkdosfs 0.2.5
[INFO] tweaked toml for crates.io crate mkdosfs 0.2.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate mkdosfs 0.2.5 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-attributes v0.1.22
[INFO] [stderr]   Downloaded time-macros v0.2.4
[INFO] [stderr]   Downloaded once_cell v1.13.0
[INFO] [stderr]   Downloaded time v0.3.13
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.15
[INFO] [stderr]   Downloaded libc v0.2.129
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75957ddb091d46a0ad63dd7f9a1c2b928418000655029dd0058046f4b38e5224
[INFO] running `Command { std: "docker" "start" "-a" "75957ddb091d46a0ad63dd7f9a1c2b928418000655029dd0058046f4b38e5224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75957ddb091d46a0ad63dd7f9a1c2b928418000655029dd0058046f4b38e5224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75957ddb091d46a0ad63dd7f9a1c2b928418000655029dd0058046f4b38e5224", kill_on_drop: false }`
[INFO] [stdout] 75957ddb091d46a0ad63dd7f9a1c2b928418000655029dd0058046f4b38e5224
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45b2a89c272d91a332d0c26c30fbdf22954662ac66f3f3c8de53c98fc3fbaabc
[INFO] running `Command { std: "docker" "start" "-a" "45b2a89c272d91a332d0c26c30fbdf22954662ac66f3f3c8de53c98fc3fbaabc", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling libc v0.2.129
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling encoding_rs v0.8.31
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling time-macros v0.2.4
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking time v0.3.13
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking tracing-subscriber v0.3.15
[INFO] [stderr]     Checking mkdosfs v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 |         for mut ent in self.entries.iter_mut() {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 |         for mut ent in self.entries.iter_mut() {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.00s
[INFO] running `Command { std: "docker" "inspect" "45b2a89c272d91a332d0c26c30fbdf22954662ac66f3f3c8de53c98fc3fbaabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45b2a89c272d91a332d0c26c30fbdf22954662ac66f3f3c8de53c98fc3fbaabc", kill_on_drop: false }`
[INFO] [stdout] 45b2a89c272d91a332d0c26c30fbdf22954662ac66f3f3c8de53c98fc3fbaabc
[INFO] checking mkdosfs-0.2.5 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate mkdosfs 0.2.5 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate mkdosfs 0.2.5 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 mkdosfs 0.2.5
[INFO] finished tweaking crates.io crate mkdosfs 0.2.5
[INFO] tweaked toml for crates.io crate mkdosfs 0.2.5 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate mkdosfs 0.2.5 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 4189575bb40ed1852c12e9621c3fb44b2d9ffab409c0c195e451c6bd4434f37d
[INFO] running `Command { std: "docker" "start" "-a" "4189575bb40ed1852c12e9621c3fb44b2d9ffab409c0c195e451c6bd4434f37d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4189575bb40ed1852c12e9621c3fb44b2d9ffab409c0c195e451c6bd4434f37d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4189575bb40ed1852c12e9621c3fb44b2d9ffab409c0c195e451c6bd4434f37d", kill_on_drop: false }`
[INFO] [stdout] 4189575bb40ed1852c12e9621c3fb44b2d9ffab409c0c195e451c6bd4434f37d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] c28edffe78083d61326bdc66a69e9f025f95cbf8483261328d5c7d9e0b789239
[INFO] running `Command { std: "docker" "start" "-a" "c28edffe78083d61326bdc66a69e9f025f95cbf8483261328d5c7d9e0b789239", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling libc v0.2.129
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling encoding_rs v0.8.31
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling time-macros v0.2.4
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking time v0.3.13
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking tracing-subscriber v0.3.15
[INFO] [stderr]     Checking mkdosfs v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 |         for mut ent in self.entries.iter_mut() {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 |         for mut ent in self.entries.iter_mut() {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.78s
[INFO] running `Command { std: "docker" "inspect" "c28edffe78083d61326bdc66a69e9f025f95cbf8483261328d5c7d9e0b789239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c28edffe78083d61326bdc66a69e9f025f95cbf8483261328d5c7d9e0b789239", kill_on_drop: false }`
[INFO] [stdout] c28edffe78083d61326bdc66a69e9f025f95cbf8483261328d5c7d9e0b789239