[INFO] updating cached repository uranusjr/molt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/uranusjr/molt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/uranusjr/molt" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/uranusjr/molt"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/uranusjr/molt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/uranusjr/molt" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/uranusjr/molt"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/uranusjr/molt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 43f17bf54d6c6fca62836676a926b5a27d602095
[INFO] sha for GitHub repo uranusjr/molt: 43f17bf54d6c6fca62836676a926b5a27d602095
[INFO] validating manifest of uranusjr/molt on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of uranusjr/molt on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing uranusjr/molt
[INFO] finished frobbing uranusjr/molt
[INFO] frobbed toml for uranusjr/molt written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/uranusjr/molt/Cargo.toml
[INFO] started frobbing uranusjr/molt
[INFO] finished frobbing uranusjr/molt
[INFO] frobbed toml for uranusjr/molt written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/uranusjr/molt/Cargo.toml
[INFO] crate uranusjr/molt already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking uranusjr/molt against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-4/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/uranusjr/molt:/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=forbid" "-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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ffa61b4120e1702570d4b9433967d5bd6b3a9ada1e30d5d3c78a8aba623f0b6c
[INFO] running `"docker" "start" "-a" "ffa61b4120e1702570d4b9433967d5bd6b3a9ada1e30d5d3c78a8aba623f0b6c"`
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]     Checking dunce v1.0.0
[INFO] [stderr]     Checking unindent v0.1.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]     Checking memchr v2.2.0
[INFO] [stderr]    Compiling rust-embed-impl v4.3.0
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]     Checking tempfile v3.0.7
[INFO] [stderr]     Checking rust-embed v4.3.0
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling molt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: failed to run custom build command for `molt v0.1.0 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/molt-a6209159356839a9/build-script-build` (exit code: 1)
[INFO] [stderr] --- stdout
[INFO] [stderr] cargo:rereun-if-changed=/opt/crater/workdir/target
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/__init__.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/locks.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/locks.schema.json
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/foreign
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/foreign/poetry_lock.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/foreign/pipfile_lock.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/foreign/__init__.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/python/molt/_backports.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/vendor/virtenv.txt
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/vendor/__main__.py
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/vendor/molt.txt
[INFO] [stderr] cargo:rerun-if-changed=/opt/crater/workdir/vendor/packaging.txt
[INFO] [stderr] 
[INFO] [stderr] --- stderr
[INFO] [stderr] Traceback (most recent call last):
[INFO] [stderr]   File "/usr/lib/python3.5/runpy.py", line 193, in _run_module_as_main
[INFO] [stderr]     "__main__", mod_spec)
[INFO] [stderr]   File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
[INFO] [stderr]     exec(code, run_globals)
[INFO] [stderr]   File "/opt/crater/workdir/vendor/__main__.py", line 128, in <module>
[INFO] [stderr]     main()
[INFO] [stderr]   File "/opt/crater/workdir/vendor/__main__.py", line 115, in main
[INFO] [stderr]     os.makedirs(p)
[INFO] [stderr]   File "/usr/lib/python3.5/os.py", line 231, in makedirs
[INFO] [stderr]     makedirs(head, mode, exist_ok)
[INFO] [stderr]   File "/usr/lib/python3.5/os.py", line 231, in makedirs
[INFO] [stderr]     makedirs(head, mode, exist_ok)
[INFO] [stderr]   File "/usr/lib/python3.5/os.py", line 241, in makedirs
[INFO] [stderr]     mkdir(name, mode)
[INFO] [stderr] OSError: [Errno 30] Read-only file system: '/opt/crater/workdir/target'
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ffa61b4120e1702570d4b9433967d5bd6b3a9ada1e30d5d3c78a8aba623f0b6c"`
[INFO] running `"docker" "rm" "-f" "ffa61b4120e1702570d4b9433967d5bd6b3a9ada1e30d5d3c78a8aba623f0b6c"`
[INFO] [stdout] ffa61b4120e1702570d4b9433967d5bd6b3a9ada1e30d5d3c78a8aba623f0b6c