[INFO] fetching crate math_captcha 0.1.1...
[INFO] checking math_captcha-0.1.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate math_captcha 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate math_captcha 0.1.1 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 math_captcha 0.1.1
[INFO] finished tweaking crates.io crate math_captcha 0.1.1
[INFO] tweaked toml for crates.io crate math_captcha 0.1.1 written to /workspace/builds/worker-5-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 76 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.12)
[INFO] [stderr]       Adding image v0.24.9 (latest: v0.25.1)
[INFO] [stderr]       Adding imageproc v0.23.0 (latest: v0.24.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding nalgebra v0.30.1 (latest: v0.32.5)
[INFO] [stderr]       Adding owned_ttf_parser v0.15.2 (latest: v0.20.0)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_distr v0.2.2 (latest: v0.4.3)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding simba v0.7.3 (latest: v0.8.1)
[INFO] [stderr]       Adding ttf-parser v0.15.2 (latest: v0.20.0)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 9e76af0dafcd181dbaf359435bd26c9b5b126a0ba8a994b9bab6f1e6b8bebe4a
[INFO] running `Command { std: "docker" "start" "-a" "9e76af0dafcd181dbaf359435bd26c9b5b126a0ba8a994b9bab6f1e6b8bebe4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e76af0dafcd181dbaf359435bd26c9b5b126a0ba8a994b9bab6f1e6b8bebe4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e76af0dafcd181dbaf359435bd26c9b5b126a0ba8a994b9bab6f1e6b8bebe4a", kill_on_drop: false }`
[INFO] [stdout] 9e76af0dafcd181dbaf359435bd26c9b5b126a0ba8a994b9bab6f1e6b8bebe4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3a755c0feb8c3fbdd619f7080d8bcc204ca8bfd2788023acc35d21aa515367b6
[INFO] running `Command { std: "docker" "start" "-a" "3a755c0feb8c3fbdd619f7080d8bcc204ca8bfd2788023acc35d21aa515367b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking bytemuck v1.15.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]     Checking weezl v0.1.8
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking half v2.4.0
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]     Checking safe_arch v0.7.1
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]     Checking lebe v0.5.2
[INFO] [stderr]     Checking ttf-parser v0.15.2
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking gif v0.13.1
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking ab_glyph_rasterizer v0.1.8
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking wide v0.7.15
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking png v0.17.13
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking exr v1.72.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking owned_ttf_parser v0.15.2
[INFO] [stderr]     Checking rusttype v0.9.3
[INFO] [stderr]     Checking simba v0.7.3
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking jpeg-decoder v0.3.1
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking nalgebra v0.30.1
[INFO] [stderr]     Checking imageproc v0.23.0
[INFO] [stderr]     Checking math_captcha v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.69s
[INFO] running `Command { std: "docker" "inspect" "3a755c0feb8c3fbdd619f7080d8bcc204ca8bfd2788023acc35d21aa515367b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a755c0feb8c3fbdd619f7080d8bcc204ca8bfd2788023acc35d21aa515367b6", kill_on_drop: false }`
[INFO] [stdout] 3a755c0feb8c3fbdd619f7080d8bcc204ca8bfd2788023acc35d21aa515367b6
[INFO] checking math_captcha-0.1.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate math_captcha 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate math_captcha 0.1.1 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 math_captcha 0.1.1
[INFO] finished tweaking crates.io crate math_captcha 0.1.1
[INFO] tweaked toml for crates.io crate math_captcha 0.1.1 written to /workspace/builds/worker-5-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 76 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.12)
[INFO] [stderr]       Adding image v0.24.9 (latest: v0.25.1)
[INFO] [stderr]       Adding imageproc v0.23.0 (latest: v0.24.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding nalgebra v0.30.1 (latest: v0.32.5)
[INFO] [stderr]       Adding owned_ttf_parser v0.15.2 (latest: v0.20.0)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_distr v0.2.2 (latest: v0.4.3)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding simba v0.7.3 (latest: v0.8.1)
[INFO] [stderr]       Adding ttf-parser v0.15.2 (latest: v0.20.0)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] b7ebbe9b9f54693e91be5823b7b9eb21b1413c3bbea5971151043296c3c8c016
[INFO] running `Command { std: "docker" "start" "-a" "b7ebbe9b9f54693e91be5823b7b9eb21b1413c3bbea5971151043296c3c8c016", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7ebbe9b9f54693e91be5823b7b9eb21b1413c3bbea5971151043296c3c8c016", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7ebbe9b9f54693e91be5823b7b9eb21b1413c3bbea5971151043296c3c8c016", kill_on_drop: false }`
[INFO] [stdout] b7ebbe9b9f54693e91be5823b7b9eb21b1413c3bbea5971151043296c3c8c016
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0633bac425e904fbc139ffea49ced85b51ba05c3e7a44717b09713edb94d0dbc
[INFO] running `Command { std: "docker" "start" "-a" "0633bac425e904fbc139ffea49ced85b51ba05c3e7a44717b09713edb94d0dbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking bytemuck v1.15.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]     Checking weezl v0.1.8
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking half v2.4.0
[INFO] [stderr]     Checking ttf-parser v0.15.2
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking lebe v0.5.2
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking safe_arch v0.7.1
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking gif v0.13.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking ab_glyph_rasterizer v0.1.8
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking wide v0.7.15
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking png v0.17.13
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking exr v1.72.0
[INFO] [stderr]     Checking owned_ttf_parser v0.15.2
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking rusttype v0.9.3
[INFO] [stderr]     Checking simba v0.7.3
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking jpeg-decoder v0.3.1
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking nalgebra v0.30.1
[INFO] [stderr]     Checking imageproc v0.23.0
[INFO] [stderr]     Checking math_captcha v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.71s
[INFO] running `Command { std: "docker" "inspect" "0633bac425e904fbc139ffea49ced85b51ba05c3e7a44717b09713edb94d0dbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0633bac425e904fbc139ffea49ced85b51ba05c3e7a44717b09713edb94d0dbc", kill_on_drop: false }`
[INFO] [stdout] 0633bac425e904fbc139ffea49ced85b51ba05c3e7a44717b09713edb94d0dbc