[INFO] fetching crate sfmt 0.6.0...
[INFO] checking sfmt-0.6.0 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate sfmt 0.6.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate sfmt 0.6.0 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sfmt 0.6.0
[INFO] finished tweaking crates.io crate sfmt 0.6.0
[INFO] tweaked toml for crates.io crate sfmt 0.6.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] eea597fe31e9704f9f2bc087c53f29d38e9a3c2e444a597608926d3ed982ccef
[INFO] running `Command { std: "docker" "start" "-a" "eea597fe31e9704f9f2bc087c53f29d38e9a3c2e444a597608926d3ed982ccef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eea597fe31e9704f9f2bc087c53f29d38e9a3c2e444a597608926d3ed982ccef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eea597fe31e9704f9f2bc087c53f29d38e9a3c2e444a597608926d3ed982ccef", kill_on_drop: false }`
[INFO] [stdout] eea597fe31e9704f9f2bc087c53f29d38e9a3c2e444a597608926d3ed982ccef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a414b902ce4c0ea65d5e7e9fb6c7acaa1fabc70a2698fbcb978dfab3458a6bdb
[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" "a414b902ce4c0ea65d5e7e9fb6c7acaa1fabc70a2698fbcb978dfab3458a6bdb", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking sfmt v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/packed.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     ::std::mem::replace(vals, updated);
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/packed.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     ::std::mem::replace(vals, updated);
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `XorShiftRng`
[INFO] [stdout]   --> benches/rand_gen.rs:27:31
[INFO] [stdout]    |
[INFO] [stdout] 27 |     def_bench!(xorshift, f64, XorShiftRng::from_entropy());
[INFO] [stdout]    |                               ^^^^^^^^^^^ use of undeclared type or module `XorShiftRng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `XorShiftRng`
[INFO] [stdout]   --> benches/rand_gen.rs:33:31
[INFO] [stdout]    |
[INFO] [stdout] 33 |     def_bench!(xorshift, f32, XorShiftRng::from_entropy());
[INFO] [stdout]    |                               ^^^^^^^^^^^ use of undeclared type or module `XorShiftRng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `XorShiftRng`
[INFO] [stdout]   --> benches/rand_gen.rs:39:31
[INFO] [stdout]    |
[INFO] [stdout] 39 |     def_bench!(xorshift, u64, XorShiftRng::from_entropy());
[INFO] [stdout]    |                               ^^^^^^^^^^^ use of undeclared type or module `XorShiftRng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `XorShiftRng`
[INFO] [stdout]   --> benches/rand_gen.rs:45:31
[INFO] [stdout]    |
[INFO] [stdout] 45 |     def_bench!(xorshift, u32, XorShiftRng::from_entropy());
[INFO] [stdout]    |                               ^^^^^^^^^^^ use of undeclared type or module `XorShiftRng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sfmt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a414b902ce4c0ea65d5e7e9fb6c7acaa1fabc70a2698fbcb978dfab3458a6bdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a414b902ce4c0ea65d5e7e9fb6c7acaa1fabc70a2698fbcb978dfab3458a6bdb", kill_on_drop: false }`
[INFO] [stdout] a414b902ce4c0ea65d5e7e9fb6c7acaa1fabc70a2698fbcb978dfab3458a6bdb