[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 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e92d05326f3467ea8effd7b11e1f5e1d89ce6aeabc6abcd746686d540bd8f578
[INFO] running `"docker" "start" "-a" "e92d05326f3467ea8effd7b11e1f5e1d89ce6aeabc6abcd746686d540bd8f578"`
[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-6ba5e94d897ae0a8/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:     0x55924917a9fb - backtrace::backtrace::libunwind::trace::hfe5db90796807973
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55924917a9fb - backtrace::backtrace::trace_unsynchronized::h34b865a835594335
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55924917a9fb - std::sys_common::backtrace::_print::h527254ae44989167
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x55924917a9fb - std::sys_common::backtrace::print::he85dd5ddddf46503
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x55924917a9fb - std::panicking::default_hook::{{closure}}::h847a2eb38b396f14
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x55924917a6d7 - std::panicking::default_hook::h2ca0f9a30a0e206b
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x55924917b0c0 - std::panicking::rust_panic_with_hook::hffcefc09751839d1
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x55924916f0e4 - std::panicking::begin_panic::h537c65ee3323d796
[INFO] [stderr]                                at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x559249169f90 - build_script_build::make_debug::h8a6bcb7e85826eb0
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:8
[INFO] [stderr]    9:     0x55924916a122 - build_script_build::main::h45b0c238ede94b82
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:27
[INFO] [stderr]   10:     0x5592491696d0 - std::rt::lang_start::{{closure}}::heb6b26e31663900e
[INFO] [stderr]                                at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/rt.rs:64
[INFO] [stderr]   11:     0x55924917ab13 - std::rt::lang_start_internal::{{closure}}::h447d8812e3ee306d
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   12:     0x55924917ab13 - std::panicking::try::do_call::h4a61cb372364c745
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   13:     0x559249180cda - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   14:     0x55924917b5cd - std::panicking::try::hdf71f938885bca42
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   15:     0x55924917b5cd - std::panic::catch_unwind::h7e85dbf162b1611a
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   16:     0x55924917b5cd - std::rt::lang_start_internal::h1e06cc26b9fc25ea
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   17:     0x5592491696a9 - std::rt::lang_start::he868b839bf2f964d
[INFO] [stderr]                                at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x55924916a2ba - main
[INFO] [stderr]   19:     0x7fe5da3662e1 - __libc_start_main
[INFO] [stderr]   20:     0x5592491669ca - _start
[INFO] [stderr]   21:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "e92d05326f3467ea8effd7b11e1f5e1d89ce6aeabc6abcd746686d540bd8f578"`
[INFO] running `"docker" "rm" "-f" "e92d05326f3467ea8effd7b11e1f5e1d89ce6aeabc6abcd746686d540bd8f578"`
[INFO] [stdout] e92d05326f3467ea8effd7b11e1f5e1d89ce6aeabc6abcd746686d540bd8f578