[INFO] fetching crate ckb-contract-std 0.1.5...
[INFO] testing ckb-contract-std-0.1.5 against 1.49.0 for beta-1.50-1
[INFO] extracting crate ckb-contract-std 0.1.5 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate ckb-contract-std 0.1.5 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ckb-contract-std 0.1.5
[INFO] finished tweaking crates.io crate ckb-contract-std 0.1.5
[INFO] tweaked toml for crates.io crate ckb-contract-std 0.1.5 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate ckb-contract-std 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7501f0aa5f6ebeab5e427fb65098eadce8c9f47264b740a371c25ce5d1eaf326
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7501f0aa5f6ebeab5e427fb65098eadce8c9f47264b740a371c25ce5d1eaf326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7501f0aa5f6ebeab5e427fb65098eadce8c9f47264b740a371c25ce5d1eaf326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7501f0aa5f6ebeab5e427fb65098eadce8c9f47264b740a371c25ce5d1eaf326", kill_on_drop: false }`
[INFO] [stdout] 7501f0aa5f6ebeab5e427fb65098eadce8c9f47264b740a371c25ce5d1eaf326
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5757c057eed3bfdf81f42e71a0f244e23e02e529a8da1045ef3c697e4555f6c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d5757c057eed3bfdf81f42e71a0f244e23e02e529a8da1045ef3c697e4555f6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling buddy-alloc v0.2.0
[INFO] [stderr]    Compiling ckb-contract-std v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]   --> src/syscalls.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         asm!("ecall" : "+r"(a0):"r"(a1) "r"(a2) "r"(a3) "r"(a4) "r"(a5) "r"(a6) "r"(syscall_num)::"volatile");
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: replace with: `llvm_asm!`
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]    = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]   --> src/syscalls.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         asm!("fence" :::"memory":"volatile");
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: replace with: `llvm_asm!`
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]    = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ckb-contract-std`
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d5757c057eed3bfdf81f42e71a0f244e23e02e529a8da1045ef3c697e4555f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5757c057eed3bfdf81f42e71a0f244e23e02e529a8da1045ef3c697e4555f6c", kill_on_drop: false }`
[INFO] [stdout] d5757c057eed3bfdf81f42e71a0f244e23e02e529a8da1045ef3c697e4555f6c