[INFO] updating cached repository https://github.com/gs0510/rustrace
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 60fe42dccf7c3a32a8d041499e2f8cd5b4cae27b
[INFO] testing gs0510/rustrace against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgs0510%2Frustrace" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gs0510/rustrace on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gs0510/rustrace
[INFO] finished tweaking git repo https://github.com/gs0510/rustrace
[INFO] tweaked toml for git repo https://github.com/gs0510/rustrace written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/gs0510/rustrace already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] abedeb33b77c4041ef6061d9ffac1befc0cad96f09e0a543f614170c06b29709
[INFO] running `"docker" "start" "-a" "abedeb33b77c4041ef6061d9ffac1befc0cad96f09e0a543f614170c06b29709"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling strace v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:13:33
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn traceme() -> std::io::Result<(())> {
[INFO] [stderr]    |                                 ^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 | /     /// Whether we are exiting (rather than entering) a syscall.
[INFO] [stderr] 63 | |     /// ptrace is stopped both times when exiting and entering a syscall, we only
[INFO] [stderr] 64 | |     /// need to stop once.  
[INFO] [stderr]    | |____________________________^
[INFO] [stderr] 65 |       let mut exit = true;
[INFO] [stderr]    |       -------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 | /             /// syscall number is stored inside orig_rax register. Transalte from number
[INFO] [stderr] 78 | |             /// to syscall name using an array that stores all syscalls.  
[INFO] [stderr]    | |__________________________________________________________________________^
[INFO] [stderr] 79 |               let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |               ------------------------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/main.rs:23:42
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut regs: user_regs_struct = mem::uninitialized();
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'nix::sys::ptrace::linux::ptrace': usages of `ptrace()` should be replaced with the specialized helper functions instead
[INFO] [stderr]   --> src/main.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |             ptrace(
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::os::unix::process::CommandExt::before_exec': should be unsafe, use `pre_exec` instead
[INFO] [stderr]   --> src/main.rs:47:22
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let output = cmd.before_exec(traceme);
[INFO] [stderr]    |                      ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let output = cmd.before_exec(traceme);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut child = cmd.spawn().expect("child process failed");
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:17
[INFO] [stderr]    |
[INFO] [stderr] 79 |             let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |                 ----^^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     waitpid(pid, None);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable `syscallName` should have a snake case name
[INFO] [stderr]   --> src/main.rs:79:21
[INFO] [stderr]    |
[INFO] [stderr] 79 |             let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: convert the identifier to snake case: `syscall_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 | /             ptrace(
[INFO] [stderr] 89 | |                 Request::PTRACE_SYSCALL,
[INFO] [stderr] 90 | |                 pid,
[INFO] [stderr] 91 | |                 ptr::null_mut(),
[INFO] [stderr] 92 | |                 ptr::null_mut(),
[INFO] [stderr] 93 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:96:9
[INFO] [stderr]    |
[INFO] [stderr] 96 |         waitpid(pid, None);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.62s
[INFO] running `"docker" "inspect" "abedeb33b77c4041ef6061d9ffac1befc0cad96f09e0a543f614170c06b29709"`
[INFO] running `"docker" "rm" "-f" "abedeb33b77c4041ef6061d9ffac1befc0cad96f09e0a543f614170c06b29709"`
[INFO] [stdout] abedeb33b77c4041ef6061d9ffac1befc0cad96f09e0a543f614170c06b29709
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 904fc1ccabd1a1cdd1999a249dca85e20ed0c2edce943630f50186839914c3fe
[INFO] running `"docker" "start" "-a" "904fc1ccabd1a1cdd1999a249dca85e20ed0c2edce943630f50186839914c3fe"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling strace v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:13:33
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn traceme() -> std::io::Result<(())> {
[INFO] [stderr]    |                                 ^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 | /     /// Whether we are exiting (rather than entering) a syscall.
[INFO] [stderr] 63 | |     /// ptrace is stopped both times when exiting and entering a syscall, we only
[INFO] [stderr] 64 | |     /// need to stop once.  
[INFO] [stderr]    | |____________________________^
[INFO] [stderr] 65 |       let mut exit = true;
[INFO] [stderr]    |       -------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 | /             /// syscall number is stored inside orig_rax register. Transalte from number
[INFO] [stderr] 78 | |             /// to syscall name using an array that stores all syscalls.  
[INFO] [stderr]    | |__________________________________________________________________________^
[INFO] [stderr] 79 |               let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |               ------------------------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/main.rs:23:42
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut regs: user_regs_struct = mem::uninitialized();
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'nix::sys::ptrace::linux::ptrace': usages of `ptrace()` should be replaced with the specialized helper functions instead
[INFO] [stderr]   --> src/main.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |             ptrace(
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::os::unix::process::CommandExt::before_exec': should be unsafe, use `pre_exec` instead
[INFO] [stderr]   --> src/main.rs:47:22
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let output = cmd.before_exec(traceme);
[INFO] [stderr]    |                      ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let output = cmd.before_exec(traceme);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut child = cmd.spawn().expect("child process failed");
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:17
[INFO] [stderr]    |
[INFO] [stderr] 79 |             let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |                 ----^^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     waitpid(pid, None);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable `syscallName` should have a snake case name
[INFO] [stderr]   --> src/main.rs:79:21
[INFO] [stderr]    |
[INFO] [stderr] 79 |             let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: convert the identifier to snake case: `syscall_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 | /             ptrace(
[INFO] [stderr] 89 | |                 Request::PTRACE_SYSCALL,
[INFO] [stderr] 90 | |                 pid,
[INFO] [stderr] 91 | |                 ptr::null_mut(),
[INFO] [stderr] 92 | |                 ptr::null_mut(),
[INFO] [stderr] 93 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:96:9
[INFO] [stderr]    |
[INFO] [stderr] 96 |         waitpid(pid, None);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "904fc1ccabd1a1cdd1999a249dca85e20ed0c2edce943630f50186839914c3fe"`
[INFO] running `"docker" "rm" "-f" "904fc1ccabd1a1cdd1999a249dca85e20ed0c2edce943630f50186839914c3fe"`
[INFO] [stdout] 904fc1ccabd1a1cdd1999a249dca85e20ed0c2edce943630f50186839914c3fe
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 836e7e53c9ae6e37395f4ac3af8e6662c9d57276a9105f24e774e5632b03c32d
[INFO] running `"docker" "start" "-a" "836e7e53c9ae6e37395f4ac3af8e6662c9d57276a9105f24e774e5632b03c32d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:13:33
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn traceme() -> std::io::Result<(())> {
[INFO] [stderr]    |                                 ^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 | /     /// Whether we are exiting (rather than entering) a syscall.
[INFO] [stderr] 63 | |     /// ptrace is stopped both times when exiting and entering a syscall, we only
[INFO] [stderr] 64 | |     /// need to stop once.  
[INFO] [stderr]    | |____________________________^
[INFO] [stderr] 65 |       let mut exit = true;
[INFO] [stderr]    |       -------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 | /             /// syscall number is stored inside orig_rax register. Transalte from number
[INFO] [stderr] 78 | |             /// to syscall name using an array that stores all syscalls.  
[INFO] [stderr]    | |__________________________________________________________________________^
[INFO] [stderr] 79 |               let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |               ------------------------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/main.rs:23:42
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut regs: user_regs_struct = mem::uninitialized();
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'nix::sys::ptrace::linux::ptrace': usages of `ptrace()` should be replaced with the specialized helper functions instead
[INFO] [stderr]   --> src/main.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |             ptrace(
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::os::unix::process::CommandExt::before_exec': should be unsafe, use `pre_exec` instead
[INFO] [stderr]   --> src/main.rs:47:22
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let output = cmd.before_exec(traceme);
[INFO] [stderr]    |                      ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let output = cmd.before_exec(traceme);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut child = cmd.spawn().expect("child process failed");
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:17
[INFO] [stderr]    |
[INFO] [stderr] 79 |             let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |                 ----^^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     waitpid(pid, None);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable `syscallName` should have a snake case name
[INFO] [stderr]   --> src/main.rs:79:21
[INFO] [stderr]    |
[INFO] [stderr] 79 |             let mut syscallName = system_call_names::SYSTEM_CALL_NAMES[(regs.orig_rax) as usize];
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: convert the identifier to snake case: `syscall_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 | /             ptrace(
[INFO] [stderr] 89 | |                 Request::PTRACE_SYSCALL,
[INFO] [stderr] 90 | |                 pid,
[INFO] [stderr] 91 | |                 ptr::null_mut(),
[INFO] [stderr] 92 | |                 ptr::null_mut(),
[INFO] [stderr] 93 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:96:9
[INFO] [stderr]    |
[INFO] [stderr] 96 |         waitpid(pid, None);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/strace-29f4811ce5f79273
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "836e7e53c9ae6e37395f4ac3af8e6662c9d57276a9105f24e774e5632b03c32d"`
[INFO] running `"docker" "rm" "-f" "836e7e53c9ae6e37395f4ac3af8e6662c9d57276a9105f24e774e5632b03c32d"`
[INFO] [stdout] 836e7e53c9ae6e37395f4ac3af8e6662c9d57276a9105f24e774e5632b03c32d