[INFO] fetching crate keystone 0.9.0...
[INFO] testing keystone-0.9.0 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate keystone 0.9.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate keystone 0.9.0 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate keystone 0.9.0
[INFO] finished tweaking crates.io crate keystone 0.9.0
[INFO] tweaked toml for crates.io crate keystone 0.9.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d308ed8ebb20a86357a21ac4373260eb9a26873ba1eb65b9f69a011c04df6676
[INFO] running `Command { std: "docker" "start" "-a" "d308ed8ebb20a86357a21ac4373260eb9a26873ba1eb65b9f69a011c04df6676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d308ed8ebb20a86357a21ac4373260eb9a26873ba1eb65b9f69a011c04df6676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d308ed8ebb20a86357a21ac4373260eb9a26873ba1eb65b9f69a011c04df6676", kill_on_drop: false }`
[INFO] [stdout] d308ed8ebb20a86357a21ac4373260eb9a26873ba1eb65b9f69a011c04df6676
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85b7522b7f9337c21189927412d36b6353baceef03de6fa8fef2e2eb05a6c637
[INFO] running `Command { std: "docker" "start" "-a" "85b7522b7f9337c21189927412d36b6353baceef03de6fa8fef2e2eb05a6c637", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling keystone v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / bitflags! {
[INFO] [stdout] 19 | |     pub flags Mode : u32 {
[INFO] [stdout] 20 | |         const MODE_LITTLE_ENDIAN = 0,
[INFO] [stdout] 21 | |         const MODE_BIG_ENDIAN = 1073741824,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / bitflags! {
[INFO] [stdout] 19 | |     pub flags Mode : u32 {
[INFO] [stdout] 20 | |         const MODE_LITTLE_ENDIAN = 0,
[INFO] [stdout] 21 | |         const MODE_BIG_ENDIAN = 1073741824,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / bitflags! {
[INFO] [stdout] 90 | |     pub flags OptionValue : libc::size_t {
[INFO] [stdout] 91 | |         const OPT_SYNTAX_INTEL = 1,
[INFO] [stdout] 92 | |         const OPT_SYNTAX_ATT = 2,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / bitflags! {
[INFO] [stdout] 90 | |     pub flags OptionValue : libc::size_t {
[INFO] [stdout] 91 | |         const OPT_SYNTAX_INTEL = 1,
[INFO] [stdout] 92 | |         const OPT_SYNTAX_ATT = 2,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/keystone_const.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / bitflags! {
[INFO] [stdout] 100 | |     pub flags Error : u32 {
[INFO] [stdout] 101 | |         const ERR_ASM = 128,
[INFO] [stdout] 102 | |         const ERR_ASM_ARCH = 512,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | |     }
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/keystone_const.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / bitflags! {
[INFO] [stdout] 100 | |     pub flags Error : u32 {
[INFO] [stdout] 101 | |         const ERR_ASM = 128,
[INFO] [stdout] 102 | |         const ERR_ASM_ARCH = 512,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | |     }
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             try!(f.write_fmt(format_args!("{:02x}", byte)));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "85b7522b7f9337c21189927412d36b6353baceef03de6fa8fef2e2eb05a6c637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85b7522b7f9337c21189927412d36b6353baceef03de6fa8fef2e2eb05a6c637", kill_on_drop: false }`
[INFO] [stdout] 85b7522b7f9337c21189927412d36b6353baceef03de6fa8fef2e2eb05a6c637
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f02a91b9a640b00948233eba32b23a8194281c30ec165ccf9fe44059a31a44b3
[INFO] running `Command { std: "docker" "start" "-a" "f02a91b9a640b00948233eba32b23a8194281c30ec165ccf9fe44059a31a44b3", kill_on_drop: false }`
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / bitflags! {
[INFO] [stdout] 19 | |     pub flags Mode : u32 {
[INFO] [stdout] 20 | |         const MODE_LITTLE_ENDIAN = 0,
[INFO] [stdout] 21 | |         const MODE_BIG_ENDIAN = 1073741824,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / bitflags! {
[INFO] [stdout] 19 | |     pub flags Mode : u32 {
[INFO] [stdout] 20 | |         const MODE_LITTLE_ENDIAN = 0,
[INFO] [stdout] 21 | |         const MODE_BIG_ENDIAN = 1073741824,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / bitflags! {
[INFO] [stdout] 90 | |     pub flags OptionValue : libc::size_t {
[INFO] [stdout] 91 | |         const OPT_SYNTAX_INTEL = 1,
[INFO] [stdout] 92 | |         const OPT_SYNTAX_ATT = 2,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / bitflags! {
[INFO] [stdout] 90 | |     pub flags OptionValue : libc::size_t {
[INFO] [stdout] 91 | |         const OPT_SYNTAX_INTEL = 1,
[INFO] [stdout] 92 | |         const OPT_SYNTAX_ATT = 2,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/keystone_const.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / bitflags! {
[INFO] [stdout] 100 | |     pub flags Error : u32 {
[INFO] [stdout] 101 | |         const ERR_ASM = 128,
[INFO] [stdout] 102 | |         const ERR_ASM_ARCH = 512,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | |     }
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/keystone_const.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / bitflags! {
[INFO] [stdout] 100 | |     pub flags Error : u32 {
[INFO] [stdout] 101 | |         const ERR_ASM = 128,
[INFO] [stdout] 102 | |         const ERR_ASM_ARCH = 512,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | |     }
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling keystone v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             try!(f.write_fmt(format_args!("{:02x}", byte)));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / bitflags! {
[INFO] [stdout] 19 | |     pub flags Mode : u32 {
[INFO] [stdout] 20 | |         const MODE_LITTLE_ENDIAN = 0,
[INFO] [stdout] 21 | |         const MODE_BIG_ENDIAN = 1073741824,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / bitflags! {
[INFO] [stdout] 19 | |     pub flags Mode : u32 {
[INFO] [stdout] 20 | |         const MODE_LITTLE_ENDIAN = 0,
[INFO] [stdout] 21 | |         const MODE_BIG_ENDIAN = 1073741824,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / bitflags! {
[INFO] [stdout] 90 | |     pub flags OptionValue : libc::size_t {
[INFO] [stdout] 91 | |         const OPT_SYNTAX_INTEL = 1,
[INFO] [stdout] 92 | |         const OPT_SYNTAX_ATT = 2,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/keystone_const.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / bitflags! {
[INFO] [stdout] 90 | |     pub flags OptionValue : libc::size_t {
[INFO] [stdout] 91 | |         const OPT_SYNTAX_INTEL = 1,
[INFO] [stdout] 92 | |         const OPT_SYNTAX_ATT = 2,
[INFO] [stdout] ...  |
[INFO] [stdout] 96 | |     }
[INFO] [stdout] 97 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/keystone_const.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / bitflags! {
[INFO] [stdout] 100 | |     pub flags Error : u32 {
[INFO] [stdout] 101 | |         const ERR_ASM = 128,
[INFO] [stdout] 102 | |         const ERR_ASM_ARCH = 512,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | |     }
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/keystone_const.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / bitflags! {
[INFO] [stdout] 100 | |     pub flags Error : u32 {
[INFO] [stdout] 101 | |         const ERR_ASM = 128,
[INFO] [stdout] 102 | |         const ERR_ASM_ARCH = 512,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | |     }
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |             try!(f.write_fmt(format_args!("{:02x}", byte)));
[INFO] [stdout]    |             ^^^
[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/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.keystone.33057faf-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19.2ce5nii1qv2pdid4.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-3c9ac9e0a57bc34c.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-e9f2533bb6fcc589.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-cf3391d121eeeb11.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-eeb584a965c81620.rlib" "/opt/rustwide/target/debug/deps/libkeystone-66b89c9ec60b532b.rlib" "/opt/rustwide/target/debug/deps/liblibc-91d257e9eed50cc0.rlib" "/opt/rustwide/target/debug/deps/libbitflags-e0f7dbb2934afe82.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-7387d118fba15d64.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-dd8bf3fda2fc2c51.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-b69fd8507c8409af.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-2dff396b99681a6b.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-a78bd5aa183c7115.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-846c64d5a2fbc5ee.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-24c09062b6dc787b.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-ce93f351ca41a57b.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-e42af02528f038fc.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-514cb174319eb6d4.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-37c1534c42bc4f8c.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-06d0f7780fda2fd9.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-4228e28a8f7a03ba.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-88bb1ba4dd271224.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-a81f2980c3f58cf2.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-0b5a376b429677a6.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2a6a2797f7a73818.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-eecefd843a0dbc02.rlib" "-Wl,-Bdynamic" "-lkeystone" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/keystone-f6a21cb697503f19" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lkeystone
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `keystone` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.keystone.c5467f90-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1.1sm3l5jj8zbpiqaz.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lkeystone" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-3c9ac9e0a57bc34c.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-e9f2533bb6fcc589.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-cf3391d121eeeb11.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-eeb584a965c81620.rlib" "/opt/rustwide/target/debug/deps/liblibc-91d257e9eed50cc0.rlib" "/opt/rustwide/target/debug/deps/libbitflags-e0f7dbb2934afe82.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-7387d118fba15d64.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-dd8bf3fda2fc2c51.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-b69fd8507c8409af.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-2dff396b99681a6b.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-a78bd5aa183c7115.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-846c64d5a2fbc5ee.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-24c09062b6dc787b.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-ce93f351ca41a57b.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-e42af02528f038fc.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-514cb174319eb6d4.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-37c1534c42bc4f8c.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-06d0f7780fda2fd9.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-4228e28a8f7a03ba.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-88bb1ba4dd271224.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-a81f2980c3f58cf2.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-0b5a376b429677a6.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2a6a2797f7a73818.rlib" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-eecefd843a0dbc02.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/8262275854dc0e5381c9d42d56257d94932c5a87/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/keystone-5f0630a1bdc4c0e1" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lkeystone
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f02a91b9a640b00948233eba32b23a8194281c30ec165ccf9fe44059a31a44b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f02a91b9a640b00948233eba32b23a8194281c30ec165ccf9fe44059a31a44b3", kill_on_drop: false }`
[INFO] [stdout] f02a91b9a640b00948233eba32b23a8194281c30ec165ccf9fe44059a31a44b3