[INFO] fetching crate mockrs 1.2.6...
[INFO] building mockrs-1.2.6 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate mockrs 1.2.6 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mockrs 1.2.6
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mockrs 1.2.6
[INFO] tweaked toml for crates.io crate mockrs 1.2.6 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mockrs 1.2.6 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mockrs 1.2.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a78fe3afe2e2dd792638347584879da192ab8b28338a9680bbd8954e3c982538
[INFO] running `Command { std: "docker" "start" "-a" "a78fe3afe2e2dd792638347584879da192ab8b28338a9680bbd8954e3c982538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a78fe3afe2e2dd792638347584879da192ab8b28338a9680bbd8954e3c982538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78fe3afe2e2dd792638347584879da192ab8b28338a9680bbd8954e3c982538", kill_on_drop: false }`
[INFO] [stdout] a78fe3afe2e2dd792638347584879da192ab8b28338a9680bbd8954e3c982538
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba56c6ad3e7c42dce13295740f448322173b9700b8f3485b16c2dfa981782014
[INFO] running `Command { std: "docker" "start" "-a" "ba56c6ad3e7c42dce13295740f448322173b9700b8f3485b16c2dfa981782014", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling cc v1.2.29
[INFO] [stderr]    Compiling nix v0.29.0
[INFO] [stderr]    Compiling iced-x86 v1.21.0
[INFO] [stderr]    Compiling mockrs v1.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `tail_needed` is never read
[INFO] [stdout]   --> src/arch/x86_64.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut tail_needed = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InstrPosition` is never constructed
[INFO] [stdout]   --> src/arch/x86_64.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct InstrPosition {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.47s
[INFO] running `Command { std: "docker" "inspect" "ba56c6ad3e7c42dce13295740f448322173b9700b8f3485b16c2dfa981782014", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba56c6ad3e7c42dce13295740f448322173b9700b8f3485b16c2dfa981782014", kill_on_drop: false }`
[INFO] [stdout] ba56c6ad3e7c42dce13295740f448322173b9700b8f3485b16c2dfa981782014
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c544e125e4d75c6352fbf8aabc1a323246e8a0358c50c6437f17e514445b13d
[INFO] running `Command { std: "docker" "start" "-a" "1c544e125e4d75c6352fbf8aabc1a323246e8a0358c50c6437f17e514445b13d", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `tail_needed` is never read
[INFO] [stdout]   --> src/arch/x86_64.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut tail_needed = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InstrPosition` is never constructed
[INFO] [stdout]   --> src/arch/x86_64.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct InstrPosition {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mockrs v1.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `tail_needed` is never read
[INFO] [stdout]   --> src/arch/x86_64.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut tail_needed = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InstrPosition` is never constructed
[INFO] [stdout]   --> src/arch/x86_64.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct InstrPosition {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "1c544e125e4d75c6352fbf8aabc1a323246e8a0358c50c6437f17e514445b13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c544e125e4d75c6352fbf8aabc1a323246e8a0358c50c6437f17e514445b13d", kill_on_drop: false }`
[INFO] [stdout] 1c544e125e4d75c6352fbf8aabc1a323246e8a0358c50c6437f17e514445b13d