[INFO] fetching crate tectonic_engine_xdvipdfmx 0.4.1...
[INFO] checking tectonic_engine_xdvipdfmx-0.4.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate tectonic_engine_xdvipdfmx 0.4.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate tectonic_engine_xdvipdfmx 0.4.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tectonic_engine_xdvipdfmx 0.4.1
[INFO] finished tweaking crates.io crate tectonic_engine_xdvipdfmx 0.4.1
[INFO] tweaked toml for crates.io crate tectonic_engine_xdvipdfmx 0.4.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 61 packages
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding jni-sys v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding windows-sys v0.45.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.42.2 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tectonic_cfg_support v0.1.4
[INFO] [stderr]   Downloaded tectonic_status_base v0.2.1
[INFO] [stderr]   Downloaded tectonic_errors v0.2.1
[INFO] [stderr]   Downloaded tectonic_bridge_core v0.4.1
[INFO] [stderr]   Downloaded tectonic_bridge_flate v0.1.7
[INFO] [stderr]   Downloaded tectonic_io_base v0.4.3
[INFO] [stderr]   Downloaded tectonic_dep_support v0.1.1
[INFO] [stderr]   Downloaded tectonic_pdf_io v0.4.1
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abf2e2f49dcb89566c5d09a3c8b49cab84c1a2d57adc5e989c487ac92066ffc5
[INFO] running `Command { std: "docker" "start" "-a" "abf2e2f49dcb89566c5d09a3c8b49cab84c1a2d57adc5e989c487ac92066ffc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abf2e2f49dcb89566c5d09a3c8b49cab84c1a2d57adc5e989c487ac92066ffc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf2e2f49dcb89566c5d09a3c8b49cab84c1a2d57adc5e989c487ac92066ffc5", kill_on_drop: false }`
[INFO] [stdout] abf2e2f49dcb89566c5d09a3c8b49cab84c1a2d57adc5e989c487ac92066ffc5
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92a6fbb45673c9768d4b28570c45a01cd07b76ac3885b159a3ebb32257400738
[INFO] running `Command { std: "docker" "start" "-a" "92a6fbb45673c9768d4b28570c45a01cd07b76ac3885b159a3ebb32257400738", kill_on_drop: false }`
[INFO] [stderr]    Compiling libz-sys v1.1.16
[INFO] [stderr]    Compiling tectonic_bridge_core v0.4.1
[INFO] [stderr]    Compiling tectonic_bridge_flate v0.1.7
[INFO] [stderr]    Compiling tectonic_dep_support v0.1.1
[INFO] [stderr]     Checking xdg v2.5.2
[INFO] [stderr]    Compiling tectonic_engine_xdvipdfmx v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling tectonic_cfg_support v0.1.4
[INFO] [stderr]     Checking tectonic_errors v0.2.1
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking md-5 v0.10.6
[INFO] [stderr]     Checking tectonic_status_base v0.2.1
[INFO] [stderr]    Compiling tectonic_pdf_io v0.4.1
[INFO] [stderr]     Checking app_dirs2 v2.5.5
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking tectonic_io_base v0.4.3
[INFO] [stderr] warning: tectonic_engine_xdvipdfmx@0.4.1: Compiler version doesn't include clang or GCC: "cc" "--version"
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.52s
[INFO] running `Command { std: "docker" "inspect" "92a6fbb45673c9768d4b28570c45a01cd07b76ac3885b159a3ebb32257400738", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92a6fbb45673c9768d4b28570c45a01cd07b76ac3885b159a3ebb32257400738", kill_on_drop: false }`
[INFO] [stdout] 92a6fbb45673c9768d4b28570c45a01cd07b76ac3885b159a3ebb32257400738
[INFO] checking tectonic_engine_xdvipdfmx-0.4.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate tectonic_engine_xdvipdfmx 0.4.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate tectonic_engine_xdvipdfmx 0.4.1 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tectonic_engine_xdvipdfmx 0.4.1
[INFO] finished tweaking crates.io crate tectonic_engine_xdvipdfmx 0.4.1
[INFO] tweaked toml for crates.io crate tectonic_engine_xdvipdfmx 0.4.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf77125905b73457ac4f5f3bdb12aa3e086273fed0d2559127440e06e48ddc33
[INFO] running `Command { std: "docker" "start" "-a" "bf77125905b73457ac4f5f3bdb12aa3e086273fed0d2559127440e06e48ddc33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf77125905b73457ac4f5f3bdb12aa3e086273fed0d2559127440e06e48ddc33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf77125905b73457ac4f5f3bdb12aa3e086273fed0d2559127440e06e48ddc33", kill_on_drop: false }`
[INFO] [stdout] bf77125905b73457ac4f5f3bdb12aa3e086273fed0d2559127440e06e48ddc33
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02cdc64f416c65bfc7da7a2049e3db9d4f74123512ef9ec341100e7e8cae18ad
[INFO] running `Command { std: "docker" "start" "-a" "02cdc64f416c65bfc7da7a2049e3db9d4f74123512ef9ec341100e7e8cae18ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling tectonic_bridge_core v0.4.1
[INFO] [stderr]    Compiling libz-sys v1.1.16
[INFO] [stderr]    Compiling tectonic_bridge_flate v0.1.7
[INFO] [stderr]    Compiling tectonic_dep_support v0.1.1
[INFO] [stderr]     Checking xdg v2.5.2
[INFO] [stderr]    Compiling tectonic_engine_xdvipdfmx v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling tectonic_cfg_support v0.1.4
[INFO] [stderr]     Checking tectonic_errors v0.2.1
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking md-5 v0.10.6
[INFO] [stderr]     Checking tectonic_status_base v0.2.1
[INFO] [stderr]    Compiling tectonic_pdf_io v0.4.1
[INFO] [stderr]     Checking app_dirs2 v2.5.5
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking tectonic_io_base v0.4.3
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tectonic_io_base-0.4.3/src/stack.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 | /             match r {
[INFO] [stdout] 34 | |                 OpenResult::NotAvailable => continue,
[INFO] [stdout] 35 | |                 _ => return r,
[INFO] [stdout] 36 | |             };
[INFO] [stdout]    | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tectonic_io_base` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "02cdc64f416c65bfc7da7a2049e3db9d4f74123512ef9ec341100e7e8cae18ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02cdc64f416c65bfc7da7a2049e3db9d4f74123512ef9ec341100e7e8cae18ad", kill_on_drop: false }`
[INFO] [stdout] 02cdc64f416c65bfc7da7a2049e3db9d4f74123512ef9ec341100e7e8cae18ad