Oct 12 14:22:44.238 INFO checking samfoo/trees against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 14:22:44.238 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-0/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-0/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/source:ro,Z" "-v" "/mnt/big/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Oct 12 14:22:44.650 INFO blam! 0b82576bd056cef14750a64bd484a473a2f1ca9086712dde53b712262b743e66
Oct 12 14:22:44.660 INFO running `"docker" "start" "-a" "0b82576bd056cef14750a64bd484a473a2f1ca9086712dde53b712262b743e66"`
Oct 12 14:22:45.898 INFO kablam! usermod: no changes
Oct 12 14:22:46.050 INFO kablam!    Compiling matrixmultiply v0.1.13
Oct 12 14:22:46.050 INFO kablam!    Compiling ndarray v0.9.1
Oct 12 14:22:46.050 INFO kablam!    Compiling cairo-rs v0.1.3
Oct 12 14:22:46.051 INFO kablam!    Compiling glib-sys v0.3.4
Oct 12 14:22:46.051 INFO kablam!    Compiling gobject-sys v0.3.4
Oct 12 14:22:46.051 INFO kablam!    Compiling cairo-sys-rs v0.3.4
Oct 12 14:22:46.051 INFO kablam!     Checking itertools v0.6.0
Oct 12 14:22:46.051 INFO kablam!     Checking num-complex v0.1.38
Oct 12 14:22:55.601 INFO kablam!     Checking glib v0.1.3
Oct 12 14:23:02.273 INFO kablam!     Checking ndarray-rand v0.5.0
Oct 12 14:23:02.831 INFO kablam!     Checking trees v0.1.0 (/source)
Oct 12 14:23:03.321 INFO kablam! warning: unused import: `std::io::prelude::*`
Oct 12 14:23:03.321 INFO kablam!   --> src/main.rs:10:5
Oct 12 14:23:03.322 INFO kablam!    |
Oct 12 14:23:03.322 INFO kablam! 10 | use std::io::prelude::*;
Oct 12 14:23:03.322 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^
Oct 12 14:23:03.323 INFO kablam!    |
Oct 12 14:23:03.323 INFO kablam!    = note: #[warn(unused_imports)] on by default
Oct 12 14:23:03.323 INFO kablam! 
Oct 12 14:23:03.332 INFO kablam! warning: unused import: `std::io::prelude::*`
Oct 12 14:23:03.332 INFO kablam!   --> src/main.rs:10:5
Oct 12 14:23:03.332 INFO kablam!    |
Oct 12 14:23:03.332 INFO kablam! 10 | use std::io::prelude::*;
Oct 12 14:23:03.332 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^
Oct 12 14:23:03.332 INFO kablam!    |
Oct 12 14:23:03.332 INFO kablam!    = note: #[warn(unused_imports)] on by default
Oct 12 14:23:03.332 INFO kablam! 
Oct 12 14:23:03.445 INFO kablam! warning: unused variable: `ra`
Oct 12 14:23:03.445 INFO kablam!   --> src/tree.rs:97:25
Oct 12 14:23:03.445 INFO kablam!    |
Oct 12 14:23:03.445 INFO kablam! 97 |                     let ra = 0.3 * PI * rng.next_f64() * l_or_r;
Oct 12 14:23:03.445 INFO kablam!    |                         ^^ help: consider using `_ra` instead
Oct 12 14:23:03.445 INFO kablam!    |
Oct 12 14:23:03.446 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 12 14:23:03.446 INFO kablam! 
Oct 12 14:23:03.460 INFO kablam! warning: variable does not need to be mutable
Oct 12 14:23:03.461 INFO kablam!    --> src/main.rs:138:9
Oct 12 14:23:03.461 INFO kablam!     |
Oct 12 14:23:03.461 INFO kablam! 138 |     let mut output = File::create(output()).unwrap();
Oct 12 14:23:03.461 INFO kablam!     |         ----^^^^^^
Oct 12 14:23:03.461 INFO kablam!     |         |
Oct 12 14:23:03.461 INFO kablam!     |         help: remove this `mut`
Oct 12 14:23:03.461 INFO kablam!     |
Oct 12 14:23:03.461 INFO kablam!     = note: #[warn(unused_mut)] on by default
Oct 12 14:23:03.462 INFO kablam! 
Oct 12 14:23:03.471 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 14:23:03.471 INFO kablam!    --> src/main.rs:141:5
Oct 12 14:23:03.471 INFO kablam!     |
Oct 12 14:23:03.471 INFO kablam! 141 |     surface.write_to_png(&mut f);
Oct 12 14:23:03.471 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:23:03.472 INFO kablam!     |
Oct 12 14:23:03.472 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 12 14:23:03.472 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 14:23:03.472 INFO kablam! 
Oct 12 14:23:03.612 INFO kablam! warning: unused variable: `ra`
Oct 12 14:23:03.612 INFO kablam!   --> src/tree.rs:97:25
Oct 12 14:23:03.612 INFO kablam!    |
Oct 12 14:23:03.612 INFO kablam! 97 |                     let ra = 0.3 * PI * rng.next_f64() * l_or_r;
Oct 12 14:23:03.612 INFO kablam!    |                         ^^ help: consider using `_ra` instead
Oct 12 14:23:03.612 INFO kablam!    |
Oct 12 14:23:03.612 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 12 14:23:03.612 INFO kablam! 
Oct 12 14:23:03.628 INFO kablam! warning: variable does not need to be mutable
Oct 12 14:23:03.628 INFO kablam!    --> src/main.rs:138:9
Oct 12 14:23:03.628 INFO kablam!     |
Oct 12 14:23:03.628 INFO kablam! 138 |     let mut output = File::create(output()).unwrap();
Oct 12 14:23:03.628 INFO kablam!     |         ----^^^^^^
Oct 12 14:23:03.628 INFO kablam!     |         |
Oct 12 14:23:03.628 INFO kablam!     |         help: remove this `mut`
Oct 12 14:23:03.632 INFO kablam!     |
Oct 12 14:23:03.632 INFO kablam!     = note: #[warn(unused_mut)] on by default
Oct 12 14:23:03.632 INFO kablam! 
Oct 12 14:23:03.636 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 14:23:03.636 INFO kablam!    --> src/main.rs:141:5
Oct 12 14:23:03.636 INFO kablam!     |
Oct 12 14:23:03.636 INFO kablam! 141 |     surface.write_to_png(&mut f);
Oct 12 14:23:03.640 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:23:03.640 INFO kablam!     |
Oct 12 14:23:03.640 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 12 14:23:03.640 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 14:23:03.640 INFO kablam! 
Oct 12 14:23:03.676 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 17.75s
Oct 12 14:23:03.696 INFO kablam! su: No module specific data is present
Oct 12 14:23:04.464 INFO running `"docker" "rm" "-f" "0b82576bd056cef14750a64bd484a473a2f1ca9086712dde53b712262b743e66"`
Oct 12 14:23:04.712 INFO blam! 0b82576bd056cef14750a64bd484a473a2f1ca9086712dde53b712262b743e66