[INFO] fetching crate scryer-prolog 0.9.4...
[INFO] testing scryer-prolog-0.9.4 against master#160e7623e8cbbf1feab2b6e2a24733a98c7bde9c for pr-145628
[INFO] extracting crate scryer-prolog 0.9.4 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate scryer-prolog 0.9.4
[INFO] finished tweaking crates.io crate scryer-prolog 0.9.4
[INFO] tweaked toml for crates.io crate scryer-prolog 0.9.4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate scryer-prolog 0.9.4 on toolchain 160e7623e8cbbf1feab2b6e2a24733a98c7bde9c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate scryer-prolog 0.9.4 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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trycmd v0.14.19
[INFO] [stderr]   Downloaded to-syn-value v0.1.1
[INFO] [stderr]   Downloaded snapbox-macros v0.3.6
[INFO] [stderr]   Downloaded to-syn-value_derive v0.1.1
[INFO] [stderr]   Downloaded scryer-modular-bitfield-impl v0.11.2
[INFO] [stderr]   Downloaded ref_thread_local v0.0.0
[INFO] [stderr]   Downloaded divrem v0.1.0
[INFO] [stderr]   Downloaded scryer-modular-bitfield v0.11.4
[INFO] [stderr]   Downloaded dashu-macros v0.4.0
[INFO] [stderr]   Downloaded dashu-base v0.4.0
[INFO] [stderr]   Downloaded dashu v0.4.0
[INFO] [stderr]   Downloaded snapbox v0.4.15
[INFO] [stderr]   Downloaded dashu-ratio v0.4.0
[INFO] [stderr]   Downloaded dashu-float v0.4.1
[INFO] [stderr]   Downloaded dashu-int v0.4.0
[INFO] [stderr]   Downloaded crrl v0.6.0
[INFO] [stderr]   Downloaded iai-callgrind v0.9.0
[INFO] [stderr]   Downloaded iai-callgrind-macros v0.1.0
[INFO] [stderr]   Downloaded iai-callgrind-runner v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03c343045e299d88946e72f8a034ec195247ac2368a69ca958c2c63275544daf
[INFO] running `Command { std: "docker" "start" "-a" "03c343045e299d88946e72f8a034ec195247ac2368a69ca958c2c63275544daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03c343045e299d88946e72f8a034ec195247ac2368a69ca958c2c63275544daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03c343045e299d88946e72f8a034ec195247ac2368a69ca958c2c63275544daf", kill_on_drop: false }`
[INFO] [stdout] 03c343045e299d88946e72f8a034ec195247ac2368a69ca958c2c63275544daf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc3f7736a2a35de28103f87f8e80949d45f9b2ff9f0e647a43ec89c26143c1da
[INFO] running `Command { std: "docker" "start" "-a" "dc3f7736a2a35de28103f87f8e80949d45f9b2ff9f0e647a43ec89c26143c1da", kill_on_drop: false }`
[INFO] [stderr] error: failed to download `base64 v0.13.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack package `base64 v0.13.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to create directory `/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/base64-0.13.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `Command { std: "docker" "inspect" "dc3f7736a2a35de28103f87f8e80949d45f9b2ff9f0e647a43ec89c26143c1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc3f7736a2a35de28103f87f8e80949d45f9b2ff9f0e647a43ec89c26143c1da", kill_on_drop: false }`
[INFO] [stdout] dc3f7736a2a35de28103f87f8e80949d45f9b2ff9f0e647a43ec89c26143c1da