[INFO] fetching crate compiler_builtins 0.1.55...
[INFO] testing compiler_builtins-0.1.55 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate compiler_builtins 0.1.55 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate compiler_builtins 0.1.55 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate compiler_builtins 0.1.55
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate compiler_builtins 0.1.55
[INFO] tweaked toml for crates.io crate compiler_builtins 0.1.55 written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] crate crates.io crate compiler_builtins 0.1.55 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c849f7d593c9d3f6c182945b647d6c322fe82f1821ca0644c7b841baddfa14ed
[INFO] running `Command { std: "docker" "start" "-a" "c849f7d593c9d3f6c182945b647d6c322fe82f1821ca0644c7b841baddfa14ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c849f7d593c9d3f6c182945b647d6c322fe82f1821ca0644c7b841baddfa14ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c849f7d593c9d3f6c182945b647d6c322fe82f1821ca0644c7b841baddfa14ed", kill_on_drop: false }`
[INFO] [stdout] c849f7d593c9d3f6c182945b647d6c322fe82f1821ca0644c7b841baddfa14ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61d0285b98c0a3052940201233a869966ad684cc82203bb6e64875354cb0ed87
[INFO] running `Command { std: "docker" "start" "-a" "61d0285b98c0a3052940201233a869966ad684cc82203bb6e64875354cb0ed87", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling compiler_builtins v0.1.55 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.21s
[INFO] running `Command { std: "docker" "inspect" "61d0285b98c0a3052940201233a869966ad684cc82203bb6e64875354cb0ed87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61d0285b98c0a3052940201233a869966ad684cc82203bb6e64875354cb0ed87", kill_on_drop: false }`
[INFO] [stdout] 61d0285b98c0a3052940201233a869966ad684cc82203bb6e64875354cb0ed87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83da237bffa45eac1cd7f6f0a05ca8cb5c3b94aaf4261d1cac581843fbaee1a2
[INFO] running `Command { std: "docker" "start" "-a" "83da237bffa45eac1cd7f6f0a05ca8cb5c3b94aaf4261d1cac581843fbaee1a2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling compiler_builtins v0.1.55 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `panic_handler`
[INFO] [stdout]   --> examples/intrinsics.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | extern crate panic_handler;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compiler_builtins` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "83da237bffa45eac1cd7f6f0a05ca8cb5c3b94aaf4261d1cac581843fbaee1a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83da237bffa45eac1cd7f6f0a05ca8cb5c3b94aaf4261d1cac581843fbaee1a2", kill_on_drop: false }`
[INFO] [stdout] 83da237bffa45eac1cd7f6f0a05ca8cb5c3b94aaf4261d1cac581843fbaee1a2