[INFO] fetching crate wren 0.1.12...
[INFO] checking wren-0.1.12 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate wren 0.1.12 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate wren 0.1.12 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wren 0.1.12
[INFO] removed path dependency wren-sys from crates.io crate wren 0.1.12
[INFO] finished tweaking crates.io crate wren 0.1.12
[INFO] tweaked toml for crates.io crate wren 0.1.12 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f1d987288f58b7ed0c55976f52915fbb922e5f8c7073baeda26b93be39ff84b
[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" "9f1d987288f58b7ed0c55976f52915fbb922e5f8c7073baeda26b93be39ff84b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f1d987288f58b7ed0c55976f52915fbb922e5f8c7073baeda26b93be39ff84b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f1d987288f58b7ed0c55976f52915fbb922e5f8c7073baeda26b93be39ff84b", kill_on_drop: false }`
[INFO] [stdout] 9f1d987288f58b7ed0c55976f52915fbb922e5f8c7073baeda26b93be39ff84b
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--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] 55074c07660732116d5b960f42b3b0f08132f0d54a4f98d134d5633b54b75ccf
[INFO] running `Command { std: "docker" "start" "-a" "55074c07660732116d5b960f42b3b0f08132f0d54a4f98d134d5633b54b75ccf", kill_on_drop: false }`
[INFO] [stderr]    Compiling wren-sys v0.2.5
[INFO] [stderr] error: failed to run custom build command for `wren-sys v0.2.5`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/wren-sys-4ee33293eb7aaf09/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   make[1]: Entering directory '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wren-sys-0.2.5/wren'
[INFO] [stderr]           cc src/optional/wren_opt_meta.c    -O0 -DDEBUG -g -std=c99 -fPIC
[INFO] [stderr]   make[1]: Leaving directory '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wren-sys-0.2.5/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()', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wren-sys-0.2.5/build.rs:8:5
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55dea932fdc0 - std::backtrace_rs::backtrace::libunwind::trace::h14e81b0c16b543a7
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x55dea932fdc0 - std::backtrace_rs::backtrace::trace_unsynchronized::hc9e39e172835ff32
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x55dea932fdc0 - std::sys_common::backtrace::_print_fmt::h31994df1c8c77b8f
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x55dea932fdc0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he74e98acff43ec99
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x55dea934caac - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x55dea932dfb7 - std::io::Write::write_fmt::hea6289e6649ff508
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/io/mod.rs:1517
[INFO] [stderr]      6:     0x55dea9331ed0 - std::sys_common::backtrace::_print::h8cc65937fea24014
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x55dea9331ed0 - std::sys_common::backtrace::print::hff6a0ebb96535e34
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x55dea9331ed0 - std::panicking::default_hook::{{closure}}::h71b9700c5dda1b1d
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x55dea9331c1c - std::panicking::default_hook::h0c46e634c06c69b6
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x55dea9332533 - std::panicking::rust_panic_with_hook::he52576a0c2093334
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x55dea9319d08 - std::panicking::begin_panic::{{closure}}::h7c53d2dd74aea50b
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:506
[INFO] [stderr]     12:     0x55dea9315658 - std::sys_common::backtrace::__rust_end_short_backtrace::hed0785badfd38c44
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x55dea9319c33 - std::panicking::begin_panic::hbb6e5f4cae1249f6
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:505
[INFO] [stderr]     14:     0x55dea9314dba - build_script_build::make_debug::h1c6702cea34ba501
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wren-sys-0.2.5/build.rs:8
[INFO] [stderr]     15:     0x55dea9314f67 - build_script_build::main::hb1c1e4094992ff82
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wren-sys-0.2.5/build.rs:27
[INFO] [stderr]     16:     0x55dea9315a9b - core::ops::function::FnOnce::call_once::hd873928ee989d207
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/core/src/ops/function.rs:227
[INFO] [stderr]     17:     0x55dea931568e - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc070797934b1476
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     18:     0x55dea93194a1 - std::rt::lang_start::{{closure}}::h6e3277f23190afc6
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/rt.rs:66
[INFO] [stderr]     19:     0x55dea9332931 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h009d20b8a620bf60
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/core/src/ops/function.rs:259
[INFO] [stderr]     20:     0x55dea9332931 - std::panicking::try::do_call::h09431c39e2107c90
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:381
[INFO] [stderr]     21:     0x55dea9332931 - std::panicking::try::he27cf60b958af343
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panicking.rs:345
[INFO] [stderr]     22:     0x55dea9332931 - std::panic::catch_unwind::h7b646b0041dc5591
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/panic.rs:382
[INFO] [stderr]     23:     0x55dea9332931 - std::rt::lang_start_internal::hdad6c98af1e4747e
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/rt.rs:51
[INFO] [stderr]     24:     0x55dea9319477 - std::rt::lang_start::h7c1a45107bf8e27d
[INFO] [stderr]                                  at /rustc/a874956d940ecb3ed524b6176a171219ac4787ea/library/std/src/rt.rs:65
[INFO] [stderr]     25:     0x55dea93150fa - main
[INFO] [stderr]     26:     0x7f027c9590b3 - __libc_start_main
[INFO] [stderr]     27:     0x55dea931309e - _start
[INFO] [stderr]     28:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "55074c07660732116d5b960f42b3b0f08132f0d54a4f98d134d5633b54b75ccf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55074c07660732116d5b960f42b3b0f08132f0d54a4f98d134d5633b54b75ccf", kill_on_drop: false }`
[INFO] [stdout] 55074c07660732116d5b960f42b3b0f08132f0d54a4f98d134d5633b54b75ccf