[INFO] updating cached repository nelhage/iron-gollum
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nelhage/iron-gollum
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nelhage/iron-gollum" "work/ex/beta-1.38-1/sources/1.37.0/gh/nelhage/iron-gollum"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nelhage/iron-gollum'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nelhage/iron-gollum" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nelhage/iron-gollum"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nelhage/iron-gollum'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 504c88b3d928478fce2c98b6a54d5b85e728e858
[INFO] sha for GitHub repo nelhage/iron-gollum: 504c88b3d928478fce2c98b6a54d5b85e728e858
[INFO] validating manifest of nelhage/iron-gollum on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nelhage/iron-gollum on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nelhage/iron-gollum
[INFO] finished frobbing nelhage/iron-gollum
[INFO] frobbed toml for nelhage/iron-gollum written to work/ex/beta-1.38-1/sources/1.37.0/gh/nelhage/iron-gollum/Cargo.toml
[INFO] started frobbing nelhage/iron-gollum
[INFO] finished frobbing nelhage/iron-gollum
[INFO] frobbed toml for nelhage/iron-gollum written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nelhage/iron-gollum/Cargo.toml
[INFO] crate nelhage/iron-gollum already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing nelhage/iron-gollum against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nelhage/iron-gollum:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 85ebec62bf80e186b38b4c98049c4406ddaa2c8acf7e77f9e9db62065b73175c
[INFO] running `"docker" "start" "-a" "85ebec62bf80e186b38b4c98049c4406ddaa2c8acf7e77f9e9db62065b73175c"`
[INFO] [stderr]    Compiling iron-golem v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |             let mut inner = pair.into_inner();
[INFO] [stderr]    |                 ----^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let mut expr = *build(path, inner.next().unwrap());
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.66s
[INFO] running `"docker" "inspect" "85ebec62bf80e186b38b4c98049c4406ddaa2c8acf7e77f9e9db62065b73175c"`
[INFO] running `"docker" "rm" "-f" "85ebec62bf80e186b38b4c98049c4406ddaa2c8acf7e77f9e9db62065b73175c"`
[INFO] [stdout] 85ebec62bf80e186b38b4c98049c4406ddaa2c8acf7e77f9e9db62065b73175c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nelhage/iron-gollum:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 36e81da6fb8172deeec066d75a224c705ceeef3fb8fbbfd5a7d61af2ad07a869
[INFO] running `"docker" "start" "-a" "36e81da6fb8172deeec066d75a224c705ceeef3fb8fbbfd5a7d61af2ad07a869"`
[INFO] [stderr]    Compiling iron-golem v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |             let mut inner = pair.into_inner();
[INFO] [stderr]    |                 ----^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let mut expr = *build(path, inner.next().unwrap());
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.02s
[INFO] running `"docker" "inspect" "36e81da6fb8172deeec066d75a224c705ceeef3fb8fbbfd5a7d61af2ad07a869"`
[INFO] running `"docker" "rm" "-f" "36e81da6fb8172deeec066d75a224c705ceeef3fb8fbbfd5a7d61af2ad07a869"`
[INFO] [stdout] 36e81da6fb8172deeec066d75a224c705ceeef3fb8fbbfd5a7d61af2ad07a869
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nelhage/iron-gollum:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 48b567e6410d7a2f88535a666e0ebc6a7d46004fc9c4d4dac1bf43ce9ae0b8bf
[INFO] running `"docker" "start" "-a" "48b567e6410d7a2f88535a666e0ebc6a7d46004fc9c4d4dac1bf43ce9ae0b8bf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/iron_golem-6c39fe3fd3a84975
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test parser::tests::test_bad ... ok
[INFO] [stdout] test parser::tests::test_parser ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/iron_golem-6cfd415d03ee1537
[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] [stderr]      Running /opt/crater/target/debug/deps/test_corpus-76f3f6b028f203ad
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_typecheck ... ok
[INFO] [stdout] test test_bad ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests iron_golem
[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 `"docker" "inspect" "48b567e6410d7a2f88535a666e0ebc6a7d46004fc9c4d4dac1bf43ce9ae0b8bf"`
[INFO] running `"docker" "rm" "-f" "48b567e6410d7a2f88535a666e0ebc6a7d46004fc9c4d4dac1bf43ce9ae0b8bf"`
[INFO] [stdout] 48b567e6410d7a2f88535a666e0ebc6a7d46004fc9c4d4dac1bf43ce9ae0b8bf