[INFO] fetching crate wren_rust 0.1.3...
[INFO] testing wren_rust-0.1.3 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] extracting crate wren_rust 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate wren_rust 0.1.3 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wren_rust 0.1.3
[INFO] finished tweaking crates.io crate wren_rust 0.1.3
[INFO] tweaked toml for crates.io crate wren_rust 0.1.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f55d866b0c35a3eea3908d8050faa8aec8b4657cb632907b77ab58f32f604894
[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" "f55d866b0c35a3eea3908d8050faa8aec8b4657cb632907b77ab58f32f604894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f55d866b0c35a3eea3908d8050faa8aec8b4657cb632907b77ab58f32f604894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f55d866b0c35a3eea3908d8050faa8aec8b4657cb632907b77ab58f32f604894", kill_on_drop: false }`
[INFO] [stdout] f55d866b0c35a3eea3908d8050faa8aec8b4657cb632907b77ab58f32f604894
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] edea0821f43e9813e5b1cf2b62f0d3590fd18ff8a5a7b6218d13f0a4da172ab5
[INFO] running `Command { std: "docker" "start" "-a" "edea0821f43e9813e5b1cf2b62f0d3590fd18ff8a5a7b6218d13f0a4da172ab5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling wren_rust v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `wren_rust v0.1.3 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/wren_rust-a29f83f8531176bf/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   make[1]: Entering directory '/opt/rustwide/workdir/wren'
[INFO] [stderr]           cc src/optional/wren_opt_meta.c    -O0 -DDEBUG -g -std=c99 -fPIC
[INFO] [stderr]   make[1]: Leaving directory '/opt/rustwide/workdir/wren'
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   mkdir: cannot create directory 'build': Read-only file system
[INFO] [stderr]   make[1]: *** [util/wren.mk:200: build/debug/optional/wren_opt_meta.o] Error 1
[INFO] [stderr]   make: *** [Makefile:20: 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:     0x55b09edc8880 - std::backtrace_rs::backtrace::libunwind::trace::h1037ca7e6eeef65c
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55b09edc8880 - std::backtrace_rs::backtrace::trace_unsynchronized::haaefac1bc3669450
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55b09edc8880 - std::sys_common::backtrace::_print_fmt::h863a6f5e6d995885
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55b09edc8880 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h767e17e1aa7df6a8
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55b09ede53fc - core::fmt::write::h7aa6cd0067dca82a
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/core/src/fmt/mod.rs:1110:17
[INFO] [stderr]      5:     0x55b09edc6d35 - std::io::Write::write_fmt::h4c802b6f761026c1
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/io/mod.rs:1584:15
[INFO] [stderr]      6:     0x55b09edca4ab - std::sys_common::backtrace::_print::h2769edb26a7eb606
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55b09edca4ab - std::sys_common::backtrace::print::ha71f3549862b4cb6
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55b09edca4ab - std::panicking::default_hook::{{closure}}::h95488a3bade217f6
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55b09edc9f81 - std::panicking::default_hook::h290aa602c0fb11df
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55b09edcab51 - std::panicking::rust_panic_with_hook::hf32c4fa635e215f2
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:622:17
[INFO] [stderr]     11:     0x55b09edca627 - std::panicking::begin_panic_handler::{{closure}}::h95197ccd88846f7a
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:517:13
[INFO] [stderr]     12:     0x55b09edc8d5c - std::sys_common::backtrace::__rust_end_short_backtrace::h7641df9566f7b7d0
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55b09edca5b9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:515:5
[INFO] [stderr]     14:     0x55b09edb0201 - core::panicking::panic_fmt::hbe99dddd3092ba3c
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55b09edb014d - core::panicking::panic::h3de4db67bd397eb3
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x55b09edb29ac - build_script_build::make_debug::hdafc0715b0e3ed83
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:8:5
[INFO] [stderr]     17:     0x55b09edb2b23 - build_script_build::main::hba3ca41bf3f27a26
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:27:5
[INFO] [stderr]     18:     0x55b09edb427b - core::ops::function::FnOnce::call_once::hc3ab020619896db5
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55b09edb315e - std::sys_common::backtrace::__rust_begin_short_backtrace::hb172fb70cdc6048e
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55b09edb23e1 - std::rt::lang_start::{{closure}}::hf9048e66e46dc9d2
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/rt.rs:49:18
[INFO] [stderr]     21:     0x55b09edcb049 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h04259e4a34d07c2f
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55b09edcb049 - std::panicking::try::do_call::hb8da45704d5cfbbf
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:401:40
[INFO] [stderr]     23:     0x55b09edcb049 - std::panicking::try::h4beadc19a78fec52
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panicking.rs:365:19
[INFO] [stderr]     24:     0x55b09edcb049 - std::panic::catch_unwind::hc58016cd36ba81a4
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/panic.rs:433:14
[INFO] [stderr]     25:     0x55b09edcb049 - std::rt::lang_start_internal::hc51399759a90501a
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/rt.rs:34:21
[INFO] [stderr]     26:     0x55b09edb23c0 - std::rt::lang_start::h17fcaba3e4a3527e
[INFO] [stderr]                                  at /rustc/99e3aef02079e9c10583638520cd0c134dc3a01d/library/std/src/rt.rs:48:5
[INFO] [stderr]     27:     0x55b09edb2c9c - main
[INFO] [stderr]     28:     0x7f00163530b3 - __libc_start_main
[INFO] [stderr]     29:     0x55b09edb095e - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "edea0821f43e9813e5b1cf2b62f0d3590fd18ff8a5a7b6218d13f0a4da172ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edea0821f43e9813e5b1cf2b62f0d3590fd18ff8a5a7b6218d13f0a4da172ab5", kill_on_drop: false }`
[INFO] [stdout] edea0821f43e9813e5b1cf2b62f0d3590fd18ff8a5a7b6218d13f0a4da172ab5