[INFO] crate wren_rust 0.1.3 is already in cache
[INFO] extracting crate wren_rust 0.1.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/wren_rust/0.1.3
[INFO] extracting crate wren_rust 0.1.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wren_rust/0.1.3
[INFO] validating manifest of wren_rust-0.1.3 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 wren_rust-0.1.3 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 wren_rust-0.1.3
[INFO] finished frobbing wren_rust-0.1.3
[INFO] frobbed toml for wren_rust-0.1.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/wren_rust/0.1.3/Cargo.toml
[INFO] started frobbing wren_rust-0.1.3
[INFO] finished frobbing wren_rust-0.1.3
[INFO] frobbed toml for wren_rust-0.1.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wren_rust/0.1.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 wren_rust-0.1.3 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-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wren_rust/0.1.3:/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] 3f21ec6d4daaf361023e68993ff3b5722c2dc0c1c90d76fadf0dceebc30bbbce
[INFO] running `"docker" "start" "-a" "3f21ec6d4daaf361023e68993ff3b5722c2dc0c1c90d76fadf0dceebc30bbbce"`
[INFO] [stderr]    Compiling wren_rust v0.1.3 (/opt/crater/workdir)
[INFO] [stderr] error: failed to run custom build command for `wren_rust v0.1.3 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/wren_rust-73639e2796fcaf87/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] make[1]: Entering directory '/opt/crater/workdir/wren'
[INFO] [stderr]         cc src/optional/wren_opt_meta.c    -O0 -DDEBUG -g -std=c99 -fPIC
[INFO] [stderr] util/wren.mk:199: recipe for target 'build/debug/optional/wren_opt_meta.o' failed
[INFO] [stderr] make[1]: Leaving directory '/opt/crater/workdir/wren'
[INFO] [stderr] Makefile:20: recipe for target 'debug' failed
[INFO] [stderr] 
[INFO] [stderr] --- stderr
[INFO] [stderr] mkdir: cannot create directory 'build': Read-only file system
[INFO] [stderr] make[1]: *** [build/debug/optional/wren_opt_meta.o] Error 1
[INFO] [stderr] make: *** [debug] Error 2
[INFO] [stderr] thread 'main' panicked at 'assertion failed: status.unwrap().success()', build.rs:8:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5586b9b5375b - backtrace::backtrace::libunwind::trace::h23ae608c8b906c69
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x5586b9b5375b - backtrace::backtrace::trace_unsynchronized::h65b3ea295a85fd48
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5586b9b5375b - std::sys_common::backtrace::_print::h24f527b44b6cfc06
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x5586b9b5375b - std::sys_common::backtrace::print::h712608e4347fd64a
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x5586b9b5375b - std::panicking::default_hook::{{closure}}::h6c3d570c2b500048
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x5586b9b53436 - std::panicking::default_hook::hb29963fb4747e0dd
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x5586b9b53e1d - std::panicking::rust_panic_with_hook::hd1236c3083de823a
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x5586b9b47fb1 - std::panicking::begin_panic::h930337bf902d679b
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x5586b9b42d40 - build_script_build::make_debug::hd256ebc3f95a615e
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:8
[INFO] [stderr]    9:     0x5586b9b42ed2 - build_script_build::main::hd7173f70213c4704
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:27
[INFO] [stderr]   10:     0x5586b9b42290 - std::rt::lang_start::{{closure}}::h4f896df8e085d5a4
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/rt.rs:64
[INFO] [stderr]   11:     0x5586b9b53873 - std::rt::lang_start_internal::{{closure}}::hf367a5a6ae52b0ce
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   12:     0x5586b9b53873 - std::panicking::try::do_call::h9d779bc5e27e3284
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   13:     0x5586b9b59c4a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   14:     0x5586b9b5432d - std::panicking::try::h4af22d9cb0afa351
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   15:     0x5586b9b5432d - std::panic::catch_unwind::hbb68a9ada87bfb97
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   16:     0x5586b9b5432d - std::rt::lang_start_internal::hba9e09d74440ce4d
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   17:     0x5586b9b42269 - std::rt::lang_start::ha74c0d79fea1b6b2
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x5586b9b4306a - main
[INFO] [stderr]   19:     0x7f60e42502e1 - __libc_start_main
[INFO] [stderr]   20:     0x5586b9b3ec7a - _start
[INFO] [stderr]   21:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "3f21ec6d4daaf361023e68993ff3b5722c2dc0c1c90d76fadf0dceebc30bbbce"`
[INFO] running `"docker" "rm" "-f" "3f21ec6d4daaf361023e68993ff3b5722c2dc0c1c90d76fadf0dceebc30bbbce"`
[INFO] [stdout] 3f21ec6d4daaf361023e68993ff3b5722c2dc0c1c90d76fadf0dceebc30bbbce