[INFO] cloning repository https://github.com/ImMax/linker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ImMax/linker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FImMax%2Flinker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FImMax%2Flinker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf6cc2cd28fdebc2b7a0d526392244973bacb5a1
[INFO] testing ImMax/linker against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FImMax%2Flinker" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ImMax/linker on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ImMax/linker
[INFO] finished tweaking git repo https://github.com/ImMax/linker
[INFO] tweaked toml for git repo https://github.com/ImMax/linker written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ImMax/linker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 513f80f73e3899e2cfbd53ceda707b08e6595fae18de1b89b4eba069e1ba5ca9
[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" "513f80f73e3899e2cfbd53ceda707b08e6595fae18de1b89b4eba069e1ba5ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "513f80f73e3899e2cfbd53ceda707b08e6595fae18de1b89b4eba069e1ba5ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "513f80f73e3899e2cfbd53ceda707b08e6595fae18de1b89b4eba069e1ba5ca9", kill_on_drop: false }`
[INFO] [stdout] 513f80f73e3899e2cfbd53ceda707b08e6595fae18de1b89b4eba069e1ba5ca9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6210b95fe23e005753e1efa5a33b1e8e6b765f40ce0aad1961b350eb2d284fe0
[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" "6210b95fe23e005753e1efa5a33b1e8e6b765f40ce0aad1961b350eb2d284fe0", kill_on_drop: false }`
[INFO] [stderr]    Compiling linker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::obj_file::*`
[INFO] [stdout]  --> src/parser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use super::obj_file::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/obj_file.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 |             if (sym.sym_type == "*ABS*") {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Err(why) => panic!("can't open file {}", why.description()),
[INFO] [stdout]    |                                                      ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:30:52
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Err(why) => panic!("couldn't read {}", why.description()),
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAGIC_LINE`
[INFO] [stdout]   --> src/parser.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | const MAGIC_LINE: usize = 0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ENTRIES_LINE`
[INFO] [stdout]   --> src/parser.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | const ENTRIES_LINE: usize = 1;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NSEGS_ENTRY`
[INFO] [stdout]   --> src/parser.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | const NSEGS_ENTRY: usize = 0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NSYMS_ENTRY`
[INFO] [stdout]   --> src/parser.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const NSYMS_ENTRY: usize = 1;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NRELS_ENTRY`
[INFO] [stdout]   --> src/parser.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | const NRELS_ENTRY: usize = 2;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "6210b95fe23e005753e1efa5a33b1e8e6b765f40ce0aad1961b350eb2d284fe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6210b95fe23e005753e1efa5a33b1e8e6b765f40ce0aad1961b350eb2d284fe0", kill_on_drop: false }`
[INFO] [stdout] 6210b95fe23e005753e1efa5a33b1e8e6b765f40ce0aad1961b350eb2d284fe0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f482a7acf04abb1ecb96253bce7a8fca08d3d27ad3db85d5755b0b34cf3975e8
[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" "f482a7acf04abb1ecb96253bce7a8fca08d3d27ad3db85d5755b0b34cf3975e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling linker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::obj_file::*`
[INFO] [stdout]  --> src/parser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use super::obj_file::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/obj_file.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 |             if (sym.sym_type == "*ABS*") {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Err(why) => panic!("can't open file {}", why.description()),
[INFO] [stdout]    |                                                      ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:30:52
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Err(why) => panic!("couldn't read {}", why.description()),
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAGIC_LINE`
[INFO] [stdout]   --> src/parser.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | const MAGIC_LINE: usize = 0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ENTRIES_LINE`
[INFO] [stdout]   --> src/parser.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | const ENTRIES_LINE: usize = 1;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NSEGS_ENTRY`
[INFO] [stdout]   --> src/parser.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | const NSEGS_ENTRY: usize = 0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NSYMS_ENTRY`
[INFO] [stdout]   --> src/parser.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const NSYMS_ENTRY: usize = 1;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NRELS_ENTRY`
[INFO] [stdout]   --> src/parser.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | const NRELS_ENTRY: usize = 2;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "f482a7acf04abb1ecb96253bce7a8fca08d3d27ad3db85d5755b0b34cf3975e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f482a7acf04abb1ecb96253bce7a8fca08d3d27ad3db85d5755b0b34cf3975e8", kill_on_drop: false }`
[INFO] [stdout] f482a7acf04abb1ecb96253bce7a8fca08d3d27ad3db85d5755b0b34cf3975e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7216ec881a8580750e2ae140600d3785a50d3e72af77e68f5813c6a3f2eb5ccd
[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" "7216ec881a8580750e2ae140600d3785a50d3e72af77e68f5813c6a3f2eb5ccd", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused import: `super::obj_file::*`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/parser.rs:6:5
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 6 | use super::obj_file::*;
[INFO] [stdout] 
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/obj_file.rs:65:16
[INFO] [stderr]    |
[INFO] [stderr] 65 |             if (sym.sym_type == "*ABS*") {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/parser.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |         Err(why) => panic!("can't open file {}", why.description()),
[INFO] [stderr]    |                                                      ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/parser.rs:30:52
[INFO] [stderr]    |
[INFO] [stderr] 30 |         Err(why) => panic!("couldn't read {}", why.description()),
[INFO] [stderr]    |                                                    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `MAGIC_LINE`
[INFO] [stderr]   --> src/parser.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const MAGIC_LINE: usize = 0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ENTRIES_LINE`
[INFO] [stderr]   --> src/parser.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const ENTRIES_LINE: usize = 1;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `NSEGS_ENTRY`
[INFO] [stderr]   --> src/parser.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | const NSEGS_ENTRY: usize = 0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `NSYMS_ENTRY`
[INFO] [stderr]   --> src/parser.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | const NSYMS_ENTRY: usize = 1;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `NRELS_ENTRY`
[INFO] [stderr]   --> src/parser.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | const NRELS_ENTRY: usize = 2;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/linker-66b73ad57e6090a5
[INFO] running `Command { std: "docker" "inspect" "7216ec881a8580750e2ae140600d3785a50d3e72af77e68f5813c6a3f2eb5ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7216ec881a8580750e2ae140600d3785a50d3e72af77e68f5813c6a3f2eb5ccd", kill_on_drop: false }`
[INFO] [stdout] 7216ec881a8580750e2ae140600d3785a50d3e72af77e68f5813c6a3f2eb5ccd