[INFO] fetching crate micro_png 0.3.5...
[INFO] checking micro_png-0.3.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate micro_png 0.3.5 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate micro_png 0.3.5 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 micro_png 0.3.5
[INFO] finished tweaking crates.io crate micro_png 0.3.5
[INFO] tweaked toml for crates.io crate micro_png 0.3.5 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate micro_png 0.3.5 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quicklz v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 0d3fac9abfef9dd8996a28d5184c945af2687e5e5fe6d963276ad8dc199c6118
[INFO] running `Command { std: "docker" "start" "-a" "0d3fac9abfef9dd8996a28d5184c945af2687e5e5fe6d963276ad8dc199c6118", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d3fac9abfef9dd8996a28d5184c945af2687e5e5fe6d963276ad8dc199c6118", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d3fac9abfef9dd8996a28d5184c945af2687e5e5fe6d963276ad8dc199c6118", kill_on_drop: false }`
[INFO] [stdout] 0d3fac9abfef9dd8996a28d5184c945af2687e5e5fe6d963276ad8dc199c6118
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e89d0619eb67a863a2ec1bfc9e5ef99a94c6c525edeba8c165a7c06296a1e191
[INFO] running `Command { std: "docker" "start" "-a" "e89d0619eb67a863a2ec1bfc9e5ef99a94c6c525edeba8c165a7c06296a1e191", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking pin-project-lite v0.2.12
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking value-bag v1.4.1
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]     Checking parking v2.1.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling rustix v0.37.23
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking async-task v4.4.0
[INFO] [stderr]    Compiling thiserror v1.0.47
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking atomic-waker v1.1.1
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling syn v2.0.29
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking concurrent-queue v2.2.0
[INFO] [stderr]     Checking flate2 v1.0.27
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]     Checking async-executor v1.5.1
[INFO] [stderr]     Checking blocking v1.3.1
[INFO] [stderr]     Checking async-global-executor v2.3.1
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling thiserror-impl v1.0.47
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking futures-util v0.3.28
[INFO] [stderr]     Checking quicklz v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking micro_png v0.3.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.75s
[INFO] running `Command { std: "docker" "inspect" "e89d0619eb67a863a2ec1bfc9e5ef99a94c6c525edeba8c165a7c06296a1e191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e89d0619eb67a863a2ec1bfc9e5ef99a94c6c525edeba8c165a7c06296a1e191", kill_on_drop: false }`
[INFO] [stdout] e89d0619eb67a863a2ec1bfc9e5ef99a94c6c525edeba8c165a7c06296a1e191
[INFO] checking micro_png-0.3.5 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate micro_png 0.3.5 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate micro_png 0.3.5 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 micro_png 0.3.5
[INFO] finished tweaking crates.io crate micro_png 0.3.5
[INFO] tweaked toml for crates.io crate micro_png 0.3.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate micro_png 0.3.5 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c5938f0315733992eea9e45ca1c92d82b169085159b5f516b89738196fb6b416
[INFO] running `Command { std: "docker" "start" "-a" "c5938f0315733992eea9e45ca1c92d82b169085159b5f516b89738196fb6b416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5938f0315733992eea9e45ca1c92d82b169085159b5f516b89738196fb6b416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5938f0315733992eea9e45ca1c92d82b169085159b5f516b89738196fb6b416", kill_on_drop: false }`
[INFO] [stdout] c5938f0315733992eea9e45ca1c92d82b169085159b5f516b89738196fb6b416
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e1dc84d7645fc664e0eddeccb700085b40c50118030982e5a4feeb53165833aa
[INFO] running `Command { std: "docker" "start" "-a" "e1dc84d7645fc664e0eddeccb700085b40c50118030982e5a4feeb53165833aa", kill_on_drop: false }`
[INFO] [stderr]     Checking pin-project-lite v0.2.12
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking value-bag v1.4.1
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]     Checking parking v2.1.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling rustix v0.37.23
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking async-task v4.4.0
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling thiserror v1.0.47
[INFO] [stderr]     Checking atomic-waker v1.1.1
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling syn v2.0.29
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking flate2 v1.0.27
[INFO] [stderr]     Checking concurrent-queue v2.2.0
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]     Checking async-executor v1.5.1
[INFO] [stderr]     Checking blocking v1.3.1
[INFO] [stderr]     Checking async-global-executor v2.3.1
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling thiserror-impl v1.0.47
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking futures-util v0.3.28
[INFO] [stderr]     Checking quicklz v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking micro_png v0.3.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.08s
[INFO] running `Command { std: "docker" "inspect" "e1dc84d7645fc664e0eddeccb700085b40c50118030982e5a4feeb53165833aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1dc84d7645fc664e0eddeccb700085b40c50118030982e5a4feeb53165833aa", kill_on_drop: false }`
[INFO] [stdout] e1dc84d7645fc664e0eddeccb700085b40c50118030982e5a4feeb53165833aa