[INFO] fetching crate customasm 0.10.6...
[INFO] checking customasm-0.10.6 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate customasm 0.10.6 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate customasm 0.10.6 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate customasm 0.10.6
[INFO] finished tweaking crates.io crate customasm 0.10.6
[INFO] tweaked toml for crates.io crate customasm 0.10.6 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate customasm 0.10.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", 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] 37d8aaf32a8bb80e33dac55f376f438a767e95bee85e0e07ae30224c2cbc60e9
[INFO] running `Command { std: "docker" "start" "-a" "37d8aaf32a8bb80e33dac55f376f438a767e95bee85e0e07ae30224c2cbc60e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37d8aaf32a8bb80e33dac55f376f438a767e95bee85e0e07ae30224c2cbc60e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37d8aaf32a8bb80e33dac55f376f438a767e95bee85e0e07ae30224c2cbc60e9", kill_on_drop: false }`
[INFO] [stdout] 37d8aaf32a8bb80e33dac55f376f438a767e95bee85e0e07ae30224c2cbc60e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddb500a528fb3bd82943b3fb4a9c2f1db21418a40c971becc2917bc6b4e0fffc
[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" "ddb500a528fb3bd82943b3fb4a9c2f1db21418a40c971becc2917bc6b4e0fffc", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking getopts v0.2.17
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking customasm v0.10.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/asm/assembler.rs:409:3
[INFO] [stdout]     |
[INFO] [stdout] 409 |         mem::replace(&mut self.parsed_instrs, instrs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/asm/assembler.rs:427:3
[INFO] [stdout]     |
[INFO] [stdout] 427 |         mem::replace(&mut self.parsed_exprs, exprs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/asm/assembler.rs:409:3
[INFO] [stdout]     |
[INFO] [stdout] 409 |         mem::replace(&mut self.parsed_instrs, instrs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/asm/assembler.rs:427:3
[INFO] [stdout]     |
[INFO] [stdout] 427 |         mem::replace(&mut self.parsed_exprs, exprs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.68s
[INFO] running `Command { std: "docker" "inspect" "ddb500a528fb3bd82943b3fb4a9c2f1db21418a40c971becc2917bc6b4e0fffc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddb500a528fb3bd82943b3fb4a9c2f1db21418a40c971becc2917bc6b4e0fffc", kill_on_drop: false }`
[INFO] [stdout] ddb500a528fb3bd82943b3fb4a9c2f1db21418a40c971becc2917bc6b4e0fffc
