[INFO] fetching crate ckb-std 0.7.4...
[INFO] testing ckb-std-0.7.4 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate ckb-std 0.7.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ckb-std 0.7.4 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking crates.io crate ckb-std 0.7.4
[INFO] finished tweaking crates.io crate ckb-std 0.7.4
[INFO] tweaked toml for crates.io crate ckb-std 0.7.4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate ckb-std 0.7.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ckb-standalone-types v0.0.1-pre.1
[INFO] [stderr]   Downloaded buddy-alloc v0.4.1
[INFO] [stderr]   Downloaded ckb-x64-simulator v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77faceb1f14280805a9b7e8a6cb3267f62dad4a642182db8f30bb1d1408a5a81
[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" "77faceb1f14280805a9b7e8a6cb3267f62dad4a642182db8f30bb1d1408a5a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77faceb1f14280805a9b7e8a6cb3267f62dad4a642182db8f30bb1d1408a5a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77faceb1f14280805a9b7e8a6cb3267f62dad4a642182db8f30bb1d1408a5a81", kill_on_drop: false }`
[INFO] [stdout] 77faceb1f14280805a9b7e8a6cb3267f62dad4a642182db8f30bb1d1408a5a81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f75efcfd9aabac0609d4b84cfd6759aace0a9dfaf7f3e57914e423b091225723
[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" "f75efcfd9aabac0609d4b84cfd6759aace0a9dfaf7f3e57914e423b091225723", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.41
[INFO] [stderr]    Compiling buddy-alloc v0.4.1
[INFO] [stderr]    Compiling molecule v0.6.0
[INFO] [stderr]    Compiling ckb-standalone-types v0.0.1-pre.1
[INFO] [stderr]    Compiling ckb-std v0.7.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a0`
[INFO] [stdout]   --> src/syscalls/native.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_a0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]   --> src/syscalls/native.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/syscalls/native.rs:10:30
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                              ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a3`
[INFO] [stdout]   --> src/syscalls/native.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                       ^^ help: if this is intentional, prefix it with an underscore: `_a3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a4`
[INFO] [stdout]   --> src/syscalls/native.rs:10:48
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                ^^ help: if this is intentional, prefix it with an underscore: `_a4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a5`
[INFO] [stdout]   --> src/syscalls/native.rs:10:57
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                         ^^ help: if this is intentional, prefix it with an underscore: `_a5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a6`
[INFO] [stdout]   --> src/syscalls/native.rs:10:66
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                                  ^^ help: if this is intentional, prefix it with an underscore: `_a6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a7`
[INFO] [stdout]   --> src/syscalls/native.rs:10:75
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                                           ^^ help: if this is intentional, prefix it with an underscore: `_a7`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/syscalls/native.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     unsafe { syscall(code as u64, 0, 0, 0, 0, 0, 0, SYS_EXIT) };
[INFO] [stdout]    |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/syscalls/native.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ret = unsafe {
[INFO] [stdout]    |               ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/syscalls/native.rs:414:5
[INFO] [stdout]     |
[INFO] [stdout] 414 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/syscalls/native.rs:469:15
[INFO] [stdout]     |
[INFO] [stdout] 469 |     let ret = unsafe {
[INFO] [stdout]     |               ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.89s
[INFO] running `Command { std: "docker" "inspect" "f75efcfd9aabac0609d4b84cfd6759aace0a9dfaf7f3e57914e423b091225723", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f75efcfd9aabac0609d4b84cfd6759aace0a9dfaf7f3e57914e423b091225723", kill_on_drop: false }`
[INFO] [stdout] f75efcfd9aabac0609d4b84cfd6759aace0a9dfaf7f3e57914e423b091225723
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f2fe928217f5c9f702521c2b215f8e568f2d38edf554d96193f030e7da2e224f
[INFO] running `Command { std: "docker" "start" "-a" "f2fe928217f5c9f702521c2b215f8e568f2d38edf554d96193f030e7da2e224f", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `a0`
[INFO] [stdout]   --> src/syscalls/native.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_a0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]   --> src/syscalls/native.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/syscalls/native.rs:10:30
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                              ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a3`
[INFO] [stdout]   --> src/syscalls/native.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                       ^^ help: if this is intentional, prefix it with an underscore: `_a3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a4`
[INFO] [stdout]   --> src/syscalls/native.rs:10:48
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                ^^ help: if this is intentional, prefix it with an underscore: `_a4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a5`
[INFO] [stdout]   --> src/syscalls/native.rs:10:57
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                         ^^ help: if this is intentional, prefix it with an underscore: `_a5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a6`
[INFO] [stdout]   --> src/syscalls/native.rs:10:66
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                                  ^^ help: if this is intentional, prefix it with an underscore: `_a6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a7`
[INFO] [stdout]   --> src/syscalls/native.rs:10:75
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                                           ^^ help: if this is intentional, prefix it with an underscore: `_a7`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/syscalls/native.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     unsafe { syscall(code as u64, 0, 0, 0, 0, 0, 0, SYS_EXIT) };
[INFO] [stdout]    |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/syscalls/native.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ret = unsafe {
[INFO] [stdout]    |               ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/syscalls/native.rs:414:5
[INFO] [stdout]     |
[INFO] [stdout] 414 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ckb-std v0.7.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/syscalls/native.rs:469:15
[INFO] [stdout]     |
[INFO] [stdout] 469 |     let ret = unsafe {
[INFO] [stdout]     |               ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a0`
[INFO] [stdout]   --> src/syscalls/native.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_a0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]   --> src/syscalls/native.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/syscalls/native.rs:10:30
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                              ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a3`
[INFO] [stdout]   --> src/syscalls/native.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                       ^^ help: if this is intentional, prefix it with an underscore: `_a3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a4`
[INFO] [stdout]   --> src/syscalls/native.rs:10:48
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                ^^ help: if this is intentional, prefix it with an underscore: `_a4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a5`
[INFO] [stdout]   --> src/syscalls/native.rs:10:57
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                         ^^ help: if this is intentional, prefix it with an underscore: `_a5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a6`
[INFO] [stdout]   --> src/syscalls/native.rs:10:66
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                                  ^^ help: if this is intentional, prefix it with an underscore: `_a6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a7`
[INFO] [stdout]   --> src/syscalls/native.rs:10:75
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn syscall(a0: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64, a6: u64, a7: u64) -> u64 {
[INFO] [stdout]    |                                                                           ^^ help: if this is intentional, prefix it with an underscore: `_a7`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/syscalls/native.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     unsafe { syscall(code as u64, 0, 0, 0, 0, 0, 0, SYS_EXIT) };
[INFO] [stdout]    |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/syscalls/native.rs:35:15
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ret = unsafe {
[INFO] [stdout]    |               ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/syscalls/native.rs:414:5
[INFO] [stdout]     |
[INFO] [stdout] 414 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/syscalls/native.rs:469:15
[INFO] [stdout]     |
[INFO] [stdout] 469 |     let ret = unsafe {
[INFO] [stdout]     |               ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.0.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.1.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.10.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.11.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.2.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.3.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.4.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.5.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.6.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.7.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.8.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.9.rcgu.o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f.4mrrv8wr3ivjvcmb.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/target/debug/build/ckb-std-102bdbf516d9d4fb/out" "-L" "/opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libckb_std-b5ea7effa56e65b8.rlib" "/opt/rustwide/target/debug/deps/libbuddy_alloc-3039909ea67a3ca9.rlib" "/opt/rustwide/target/debug/deps/libckb_standalone_types-157ce976a1dd9d54.rlib" "/opt/rustwide/target/debug/deps/libmolecule-efcbdfab0aa61e73.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-de9cbe0cb77e19a3.rlib" "/opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-69528f2eac185ac9.rlib" "/opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-52d5241975807511.rlib" "/opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9924c22ae1efcf66.rlib" "/opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-d1241f7bd234a268.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/examples/main-a28781051259cb3f" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.5.rcgu.o: in function `_start':
[INFO] [stdout]           /opt/rustwide/workdir/src/entry.rs:21: multiple definition of `_start'; /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stdout]           /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
[INFO] [stdout]           (.text+0x16): undefined reference to `__libc_csu_fini'
[INFO] [stdout]           /usr/bin/ld: (.text+0x1d): undefined reference to `__libc_csu_init'
[INFO] [stdout]           /usr/bin/ld: (.text+0x2a): undefined reference to `__libc_start_main'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/rustup-home/toolchains/ecabaf78506b7a4668d42dc20268c086b93f0fad/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-69528f2eac185ac9.rlib(alloc-69528f2eac185ac9.alloc.e873c6ff-cgu.0.rcgu.o): in function `alloc::fmt::format':
[INFO] [stdout]           /rustc/ecabaf78506b7a4668d42dc20268c086b93f0fad//library/alloc/src/fmt.rs:585: undefined reference to `_Unwind_Resume'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.0.rcgu.o: in function `<u8 as alloc::vec::spec_from_elem::SpecFromElem>::from_elem':
[INFO] [stdout]           /rustc/ecabaf78506b7a4668d42dc20268c086b93f0fad/library/alloc/src/vec/spec_from_elem.rs:37: undefined reference to `_Unwind_Resume'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.5.rcgu.o: in function `main':
[INFO] [stdout]           /opt/rustwide/workdir/examples/main.rs:11: undefined reference to `_Unwind_Resume'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/examples/main-a28781051259cb3f.main.ad16cfba-cgu.5.rcgu.o: in function `rust_begin_unwind':
[INFO] [stdout]           /opt/rustwide/workdir/src/entry.rs:36: undefined reference to `_Unwind_Resume'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libckb_std-b5ea7effa56e65b8.rlib(ckb_std-b5ea7effa56e65b8.ckb_std.20ecd6e9-cgu.3.rcgu.o): in function `ckb_std::syscalls::native::debug':
[INFO] [stdout]           /opt/rustwide/workdir/src/syscalls/native.rs:411: undefined reference to `_Unwind_Resume'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libbuddy_alloc-3039909ea67a3ca9.rlib(buddy_alloc-3039909ea67a3ca9.buddy_alloc.4c3d59ee-cgu.1.rcgu.o):/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/buddy-alloc-0.4.1/src/non_threadsafe_alloc.rs:33: more undefined references to `_Unwind_Resume' follow
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout]   = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
[INFO] [stdout]   = note: use the `-l` flag to specify native libraries to link
[INFO] [stdout]   = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ckb-std`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f2fe928217f5c9f702521c2b215f8e568f2d38edf554d96193f030e7da2e224f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2fe928217f5c9f702521c2b215f8e568f2d38edf554d96193f030e7da2e224f", kill_on_drop: false }`
[INFO] [stdout] f2fe928217f5c9f702521c2b215f8e568f2d38edf554d96193f030e7da2e224f