[INFO] crate quine-mc_cluskey 0.2.4 is already in cache
[INFO] testing quine-mc_cluskey-0.2.4 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate quine-mc_cluskey 0.2.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate quine-mc_cluskey 0.2.4 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quine-mc_cluskey 0.2.4
[INFO] finished tweaking crates.io crate quine-mc_cluskey 0.2.4
[INFO] tweaked toml for crates.io crate quine-mc_cluskey 0.2.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a253b6e371dca185c0be89e547beeeb7d1f6ae100e4cf925835d3bcd36ce2ad
[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" "4a253b6e371dca185c0be89e547beeeb7d1f6ae100e4cf925835d3bcd36ce2ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a253b6e371dca185c0be89e547beeeb7d1f6ae100e4cf925835d3bcd36ce2ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a253b6e371dca185c0be89e547beeeb7d1f6ae100e4cf925835d3bcd36ce2ad", kill_on_drop: false }`
[INFO] [stdout] 4a253b6e371dca185c0be89e547beeeb7d1f6ae100e4cf925835d3bcd36ce2ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fee261497508a9714bc270c6be17156fc185960eba0003d6a2b87b941ec4a9fe
[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" "fee261497508a9714bc270c6be17156fc185960eba0003d6a2b87b941ec4a9fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:243:43
[INFO] [stdout]     |
[INFO] [stdout] 243 |                         And(_) | Or(_) => try!(write!(fmt, "({:?})", a)),
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:244:30
[INFO] [stdout]     |
[INFO] [stdout] 244 |                         _ => try!(write!(fmt, "{:?}", a)),
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:250:17
[INFO] [stdout]     |
[INFO] [stdout] 250 |                 try!(write!(fmt, "{:?}", a[0]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:253:34
[INFO] [stdout]     |
[INFO] [stdout] 253 |                         Or(_) => try!(write!(fmt, " + ({:?})", a)),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:254:30
[INFO] [stdout]     |
[INFO] [stdout] 254 |                         _ => try!(write!(fmt, " + {:?}", a)),
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:379:21
[INFO] [stdout]     |
[INFO] [stdout] 379 |                     try!(write!(fmt, "0"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:381:21
[INFO] [stdout]     |
[INFO] [stdout] 381 |                     try!(write!(fmt, "1"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:384:17
[INFO] [stdout]     |
[INFO] [stdout] 384 |                 try!(write!(fmt, "-"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `Command { std: "docker" "inspect" "fee261497508a9714bc270c6be17156fc185960eba0003d6a2b87b941ec4a9fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fee261497508a9714bc270c6be17156fc185960eba0003d6a2b87b941ec4a9fe", kill_on_drop: false }`
[INFO] [stdout] fee261497508a9714bc270c6be17156fc185960eba0003d6a2b87b941ec4a9fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8f39c92273268305892ec8a39671fc5d5f5d51c08648c9c18fe42bfe810e86c
[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" "c8f39c92273268305892ec8a39671fc5d5f5d51c08648c9c18fe42bfe810e86c", kill_on_drop: false }`
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:243:43
[INFO] [stdout]     |
[INFO] [stdout] 243 |                         And(_) | Or(_) => try!(write!(fmt, "({:?})", a)),
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:244:30
[INFO] [stdout]     |
[INFO] [stdout] 244 |                         _ => try!(write!(fmt, "{:?}", a)),
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:250:17
[INFO] [stdout]     |
[INFO] [stdout] 250 |                 try!(write!(fmt, "{:?}", a[0]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:253:34
[INFO] [stdout]     |
[INFO] [stdout] 253 |                         Or(_) => try!(write!(fmt, " + ({:?})", a)),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:254:30
[INFO] [stdout]     |
[INFO] [stdout] 254 |                         _ => try!(write!(fmt, " + {:?}", a)),
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:379:21
[INFO] [stdout]     |
[INFO] [stdout] 379 |                     try!(write!(fmt, "0"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:381:21
[INFO] [stdout]     |
[INFO] [stdout] 381 |                     try!(write!(fmt, "1"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:384:17
[INFO] [stdout]     |
[INFO] [stdout] 384 |                 try!(write!(fmt, "-"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:243:43
[INFO] [stdout]     |
[INFO] [stdout] 243 |                         And(_) | Or(_) => try!(write!(fmt, "({:?})", a)),
[INFO] [stdout]     |                                           ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:244:30
[INFO] [stdout]     |
[INFO] [stdout] 244 |                         _ => try!(write!(fmt, "{:?}", a)),
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:250:17
[INFO] [stdout]     |
[INFO] [stdout] 250 |                 try!(write!(fmt, "{:?}", a[0]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:253:34
[INFO] [stdout]     |
[INFO] [stdout] 253 |                         Or(_) => try!(write!(fmt, " + ({:?})", a)),
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:254:30
[INFO] [stdout]     |
[INFO] [stdout] 254 |                         _ => try!(write!(fmt, " + {:?}", a)),
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:379:21
[INFO] [stdout]     |
[INFO] [stdout] 379 |                     try!(write!(fmt, "0"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:381:21
[INFO] [stdout]     |
[INFO] [stdout] 381 |                     try!(write!(fmt, "1"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:384:17
[INFO] [stdout]     |
[INFO] [stdout] 384 |                 try!(write!(fmt, "-"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "c8f39c92273268305892ec8a39671fc5d5f5d51c08648c9c18fe42bfe810e86c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8f39c92273268305892ec8a39671fc5d5f5d51c08648c9c18fe42bfe810e86c", kill_on_drop: false }`
[INFO] [stdout] c8f39c92273268305892ec8a39671fc5d5f5d51c08648c9c18fe42bfe810e86c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 563d2b08f63575dc14a81071dafe81cde5dc8369647433abfa7970ac4701b065
[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" "563d2b08f63575dc14a81071dafe81cde5dc8369647433abfa7970ac4701b065", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:243:43
[INFO] [stderr]     |
[INFO] [stderr] 243 |                         And(_) | Or(_) => try!(write!(fmt, "({:?})", a)),
[INFO] [stderr]     |                                           ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:244:30
[INFO] [stderr]     |
[INFO] [stderr] 244 |                         _ => try!(write!(fmt, "{:?}", a)),
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:250:17
[INFO] [stderr]     |
[INFO] [stderr] 250 |                 try!(write!(fmt, "{:?}", a[0]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:253:34
[INFO] [stderr]     |
[INFO] [stderr] 253 |                         Or(_) => try!(write!(fmt, " + ({:?})", a)),
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:254:30
[INFO] [stderr]     |
[INFO] [stderr] 254 |                         _ => try!(write!(fmt, " + {:?}", a)),
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:379:21
[INFO] [stderr]     |
[INFO] [stderr] 379 |                     try!(write!(fmt, "0"));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:381:21
[INFO] [stderr]     |
[INFO] [stderr] 381 |                     try!(write!(fmt, "1"));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:384:17
[INFO] [stderr]     |
[INFO] [stderr] 384 |                 try!(write!(fmt, "-"));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:243:43
[INFO] [stderr]     |
[INFO] [stderr] 243 |                         And(_) | Or(_) => try!(write!(fmt, "({:?})", a)),
[INFO] [stderr]     |                                           ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:244:30
[INFO] [stderr]     |
[INFO] [stderr] 244 |                         _ => try!(write!(fmt, "{:?}", a)),
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:250:17
[INFO] [stderr]     |
[INFO] [stderr] 250 |                 try!(write!(fmt, "{:?}", a[0]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:253:34
[INFO] [stderr]     |
[INFO] [stderr] 253 |                         Or(_) => try!(write!(fmt, " + ({:?})", a)),
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:254:30
[INFO] [stderr]     |
[INFO] [stderr] 254 |                         _ => try!(write!(fmt, " + {:?}", a)),
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:379:21
[INFO] [stderr]     |
[INFO] [stderr] 379 |                     try!(write!(fmt, "0"));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:381:21
[INFO] [stderr]     |
[INFO] [stderr] 381 |                     try!(write!(fmt, "1"));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:384:17
[INFO] [stderr]     |
[INFO] [stderr] 384 |                 try!(write!(fmt, "-"));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/quine_mc_cluskey-7ad4897cd61c627a
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests quine-mc_cluskey
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "563d2b08f63575dc14a81071dafe81cde5dc8369647433abfa7970ac4701b065", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "563d2b08f63575dc14a81071dafe81cde5dc8369647433abfa7970ac4701b065", kill_on_drop: false }`
[INFO] [stdout] 563d2b08f63575dc14a81071dafe81cde5dc8369647433abfa7970ac4701b065