[INFO] cloning repository https://github.com/marcelbuesing/protobuf-codegen-pure-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marcelbuesing/protobuf-codegen-pure-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcelbuesing%2Fprotobuf-codegen-pure-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcelbuesing%2Fprotobuf-codegen-pure-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e706ddf0463ea40a02913f9bbb176a9985081c7b
[INFO] checking marcelbuesing/protobuf-codegen-pure-example against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcelbuesing%2Fprotobuf-codegen-pure-example" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marcelbuesing/protobuf-codegen-pure-example on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/marcelbuesing/protobuf-codegen-pure-example
[INFO] finished tweaking git repo https://github.com/marcelbuesing/protobuf-codegen-pure-example
[INFO] tweaked toml for git repo https://github.com/marcelbuesing/protobuf-codegen-pure-example written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/marcelbuesing/protobuf-codegen-pure-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e117fb358630496c59c02f94f8b8190dddcead8da20902e2f99999d33ffe8ff8
[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" "e117fb358630496c59c02f94f8b8190dddcead8da20902e2f99999d33ffe8ff8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e117fb358630496c59c02f94f8b8190dddcead8da20902e2f99999d33ffe8ff8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e117fb358630496c59c02f94f8b8190dddcead8da20902e2f99999d33ffe8ff8", kill_on_drop: false }`
[INFO] [stdout] e117fb358630496c59c02f94f8b8190dddcead8da20902e2f99999d33ffe8ff8
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e03a19a2b91d49f92977c248154695f4fc78c90cb67784dd851569506c27bb2e
[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" "e03a19a2b91d49f92977c248154695f4fc78c90cb67784dd851569506c27bb2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v2.8.0
[INFO] [stderr]    Compiling protobuf-codegen v2.8.0
[INFO] [stderr]    Compiling protobuf-codegen-pure v2.8.0
[INFO] [stderr]    Compiling protofbuf-codegen-pure-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `protofbuf-codegen-pure-example v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/protofbuf-codegen-pure-example-751cdd6c6ffe4785/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'protoc: Os { code: 30, kind: Other, message: "Read-only file system" }', build.rs:12:6
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5593ce47b000 - std::backtrace_rs::backtrace::libunwind::trace::ha1eabb142084ea37
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x5593ce47b000 - std::backtrace_rs::backtrace::trace_unsynchronized::hbb8825661d997281
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x5593ce47b000 - std::sys_common::backtrace::_print_fmt::h26d850e2f7183914
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x5593ce47b000 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3834b06f68a2b012
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x5593ce49b07c - core::fmt::write::h3a043650ba7bf668
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/fmt/mod.rs:1117
[INFO] [stderr]      5:     0x5593ce479615 - std::io::Write::write_fmt::h9c0c8944a1898139
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/io/mod.rs:1510
[INFO] [stderr]      6:     0x5593ce47d180 - std::sys_common::backtrace::_print::h693c0c2cc41d4d10
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x5593ce47d180 - std::sys_common::backtrace::print::h213be73e5670b8ea
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x5593ce47d180 - std::panicking::default_hook::{{closure}}::h2d49a3361cc4e7ea
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:200
[INFO] [stderr]      9:     0x5593ce47cecc - std::panicking::default_hook::hd41fbdeba93207ba
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:219
[INFO] [stderr]     10:     0x5593ce47d7e3 - std::panicking::rust_panic_with_hook::hcab398664b4bd473
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:569
[INFO] [stderr]     11:     0x5593ce47d3b9 - std::panicking::begin_panic_handler::{{closure}}::h7512c6f2998ba93d
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:476
[INFO] [stderr]     12:     0x5593ce47b46c - std::sys_common::backtrace::__rust_end_short_backtrace::h1a25d7e7e1864d3d
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x5593ce47d379 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:475
[INFO] [stderr]     14:     0x5593ce498fe1 - core::panicking::panic_fmt::h019ad16a92ccd092
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x5593ce498e03 - core::option::expect_none_failed::h7135ba2fdb185931
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/option.rs:1274
[INFO] [stderr]     16:     0x5593ce1dd42f - core::result::Result<T,E>::expect::h530bdbf2586fd35d
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/result.rs:963
[INFO] [stderr]     17:     0x5593ce1dd665 - build_script_build::main::h1044e780d95ca097
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:4
[INFO] [stderr]     18:     0x5593ce1dd35b - core::ops::function::FnOnce::call_once::h31d514fc4b69dd95
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/ops/function.rs:233
[INFO] [stderr]     19:     0x5593ce1dd2fe - std::sys_common::backtrace::__rust_begin_short_backtrace::he34294c3baa76678
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     20:     0x5593ce1dd4e1 - std::rt::lang_start::{{closure}}::h2470f11f78a8e50c
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/rt.rs:66
[INFO] [stderr]     21:     0x5593ce47dbf2 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hde9814ae740a85dc
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/ops/function.rs:265
[INFO] [stderr]     22:     0x5593ce47dbf2 - std::panicking::try::do_call::h3026bab8cd7540d7
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:373
[INFO] [stderr]     23:     0x5593ce47dbf2 - std::panicking::try::h852bb5e5a66f7f84
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:337
[INFO] [stderr]     24:     0x5593ce47dbf2 - std::panic::catch_unwind::hfeb0f3dddf7c6a72
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panic.rs:394
[INFO] [stderr]     25:     0x5593ce47dbf2 - std::rt::lang_start_internal::h32f0ac6e87476559
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/rt.rs:51
[INFO] [stderr]     26:     0x5593ce1dd4b7 - std::rt::lang_start::h325a77ed80446922
[INFO] [stderr]                                  at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/rt.rs:65
[INFO] [stderr]     27:     0x5593ce1dd69a - main
[INFO] [stderr]     28:     0x7f05ca3fa0b3 - __libc_start_main
[INFO] [stderr]     29:     0x5593ce1dd0be - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "e03a19a2b91d49f92977c248154695f4fc78c90cb67784dd851569506c27bb2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e03a19a2b91d49f92977c248154695f4fc78c90cb67784dd851569506c27bb2e", kill_on_drop: false }`
[INFO] [stdout] e03a19a2b91d49f92977c248154695f4fc78c90cb67784dd851569506c27bb2e