[INFO] fetching crate ktest 0.1.6...
[INFO] testing ktest-0.1.6 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate ktest 0.1.6 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-7-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate ktest 0.1.6
[INFO] finished tweaking crates.io crate ktest 0.1.6
[INFO] tweaked toml for crates.io crate ktest 0.1.6 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ktest 0.1.6 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ktest 0.1.6 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86cdd4496e9c2bb80a1ca6d83c7645ddb519002e87bdaa3ff4d1702d5beedd0d
[INFO] running `Command { std: "docker" "start" "-a" "86cdd4496e9c2bb80a1ca6d83c7645ddb519002e87bdaa3ff4d1702d5beedd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86cdd4496e9c2bb80a1ca6d83c7645ddb519002e87bdaa3ff4d1702d5beedd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86cdd4496e9c2bb80a1ca6d83c7645ddb519002e87bdaa3ff4d1702d5beedd0d", kill_on_drop: false }`
[INFO] [stdout] 86cdd4496e9c2bb80a1ca6d83c7645ddb519002e87bdaa3ff4d1702d5beedd0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18b95e67dc1b93415ff758273d3899ca2bbdc0b1aaad37bd7ecec0a750fe4ff4
[INFO] running `Command { std: "docker" "start" "-a" "18b95e67dc1b93415ff758273d3899ca2bbdc0b1aaad37bd7ecec0a750fe4ff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling bit_field v0.10.3
[INFO] [stderr]    Compiling x86 v0.52.0
[INFO] [stderr]    Compiling bootloader_api v0.11.12
[INFO] [stderr]    Compiling heapless v0.9.1
[INFO] [stderr]    Compiling conquer-util v0.3.0
[INFO] [stderr]    Compiling volatile v0.4.6
[INFO] [stderr]    Compiling raw-cpuid v10.7.0
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling spinning_top v0.2.5
[INFO] [stderr]    Compiling spin v0.10.0
[INFO] [stderr]    Compiling linked_list_allocator v0.10.5
[INFO] [stderr]    Compiling conquer-once v0.4.0
[INFO] [stderr]    Compiling x86_64 v0.15.2
[INFO] [stderr]    Compiling syn v2.0.107
[INFO] [stderr]    Compiling uart_16550 v0.4.0
[INFO] [stderr]    Compiling ktest-macros v0.1.2
[INFO] [stderr]    Compiling ktest v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: feature `try_blocks` is declared but not used
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(try_blocks)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.39s
[INFO] running `Command { std: "docker" "inspect" "18b95e67dc1b93415ff758273d3899ca2bbdc0b1aaad37bd7ecec0a750fe4ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18b95e67dc1b93415ff758273d3899ca2bbdc0b1aaad37bd7ecec0a750fe4ff4", kill_on_drop: false }`
[INFO] [stdout] 18b95e67dc1b93415ff758273d3899ca2bbdc0b1aaad37bd7ecec0a750fe4ff4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a68901d56d6f83799b75953731db9b01aba61bc2cfc85035d81ae9a10625a45
[INFO] running `Command { std: "docker" "start" "-a" "6a68901d56d6f83799b75953731db9b01aba61bc2cfc85035d81ae9a10625a45", kill_on_drop: false }`
[INFO] [stderr]    Compiling ktest v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: feature `try_blocks` is declared but not used
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(try_blocks)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ktest` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6a68901d56d6f83799b75953731db9b01aba61bc2cfc85035d81ae9a10625a45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a68901d56d6f83799b75953731db9b01aba61bc2cfc85035d81ae9a10625a45", kill_on_drop: false }`
[INFO] [stdout] 6a68901d56d6f83799b75953731db9b01aba61bc2cfc85035d81ae9a10625a45