[INFO] cloning repository https://github.com/stevethedev/rust-protobuf-chars-bug
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevethedev/rust-protobuf-chars-bug" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevethedev%2Frust-protobuf-chars-bug", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevethedev%2Frust-protobuf-chars-bug'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fe5b613ad1fe43e3020cf89438892aa5a487a3db
[INFO] checking stevethedev/rust-protobuf-chars-bug against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevethedev%2Frust-protobuf-chars-bug" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stevethedev/rust-protobuf-chars-bug on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stevethedev/rust-protobuf-chars-bug
[INFO] finished tweaking git repo https://github.com/stevethedev/rust-protobuf-chars-bug
[INFO] tweaked toml for git repo https://github.com/stevethedev/rust-protobuf-chars-bug written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/stevethedev/rust-protobuf-chars-bug already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded protoc v2.8.1
[INFO] [stderr]   Downloaded protoc-rust v2.8.1
[INFO] [stderr]   Downloaded protobuf-codegen v2.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bdd51e0e98ab5b810cf2fcb34ea70338f3896b4dc28b7647408d54777ee69769
[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" "bdd51e0e98ab5b810cf2fcb34ea70338f3896b4dc28b7647408d54777ee69769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdd51e0e98ab5b810cf2fcb34ea70338f3896b4dc28b7647408d54777ee69769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdd51e0e98ab5b810cf2fcb34ea70338f3896b4dc28b7647408d54777ee69769", kill_on_drop: false }`
[INFO] [stdout] bdd51e0e98ab5b810cf2fcb34ea70338f3896b4dc28b7647408d54777ee69769
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6ea6e24fbb7a1627efe2501eab08b0ed3c02f064141f5681e6a3bf781442767
[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" "f6ea6e24fbb7a1627efe2501eab08b0ed3c02f064141f5681e6a3bf781442767", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling protobuf v2.8.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling protoc v2.8.1
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling protobuf-codegen v2.8.1
[INFO] [stderr]    Compiling protoc-rust v2.8.1
[INFO] [stderr]    Compiling protobuf-bug v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `protobuf-bug v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/protobuf-bug-bdbf9bcce03fbdc3/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'protoc: Os { code: 30, kind: Other, message: "Read-only file system" }', build.rs:15:4
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55cbe977c7c0 - std::backtrace_rs::backtrace::libunwind::trace::h1037ca7e6eeef65c
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55cbe977c7c0 - std::backtrace_rs::backtrace::trace_unsynchronized::haaefac1bc3669450
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55cbe977c7c0 - std::sys_common::backtrace::_print_fmt::h863a6f5e6d995885
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55cbe977c7c0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h767e17e1aa7df6a8
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55cbe97a191f - core::fmt::write::h7aa6cd0067dca82a
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/core/src/fmt/mod.rs:1094:17
[INFO] [stderr]      5:     0x55cbe9779f15 - std::io::Write::write_fmt::h4c802b6f761026c1
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/io/mod.rs:1584:15
[INFO] [stderr]      6:     0x55cbe977e92b - std::sys_common::backtrace::_print::h2769edb26a7eb606
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55cbe977e92b - std::sys_common::backtrace::print::ha71f3549862b4cb6
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55cbe977e92b - std::panicking::default_hook::{{closure}}::h95488a3bade217f6
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55cbe977e401 - std::panicking::default_hook::h290aa602c0fb11df
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55cbe977ef40 - std::panicking::rust_panic_with_hook::hf32c4fa635e215f2
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:625:17
[INFO] [stderr]     11:     0x55cbe977ead7 - std::panicking::begin_panic_handler::{{closure}}::h95197ccd88846f7a
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:519:13
[INFO] [stderr]     12:     0x55cbe977cc5c - std::sys_common::backtrace::__rust_end_short_backtrace::h7641df9566f7b7d0
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55cbe977ea39 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:515:5
[INFO] [stderr]     14:     0x55cbe95034f1 - core::panicking::panic_fmt::hbe99dddd3092ba3c
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55cbe95035e3 - core::result::unwrap_failed::hf79563fef9d11ab8
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/core/src/result.rs:1355:5
[INFO] [stderr]     16:     0x55cbe9504210 - core::result::Result<T,E>::expect::hda3c9e9d6e419359
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/core/src/result.rs:997:23
[INFO] [stderr]     17:     0x55cbe9503f39 - build_script_build::main::h50660eba3b30c832
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:4:3
[INFO] [stderr]     18:     0x55cbe9503fdb - core::ops::function::FnOnce::call_once::h973b0efabf3f7c29
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55cbe9503f7e - std::sys_common::backtrace::__rust_begin_short_backtrace::h604c24f46baa8f4e
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55cbe9503dd1 - std::rt::lang_start::{{closure}}::hcdcc285a8819637b
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/rt.rs:49:18
[INFO] [stderr]     21:     0x55cbe977f37a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h04259e4a34d07c2f
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55cbe977f37a - std::panicking::try::do_call::hb8da45704d5cfbbf
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:401:40
[INFO] [stderr]     23:     0x55cbe977f37a - std::panicking::try::h4beadc19a78fec52
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panicking.rs:365:19
[INFO] [stderr]     24:     0x55cbe977f37a - std::panic::catch_unwind::hc58016cd36ba81a4
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/panic.rs:433:14
[INFO] [stderr]     25:     0x55cbe977f37a - std::rt::lang_start_internal::hc51399759a90501a
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/rt.rs:34:21
[INFO] [stderr]     26:     0x55cbe9503db0 - std::rt::lang_start::hac612a14ed6acc5c
[INFO] [stderr]                                  at /rustc/3bb2879ea9e58d65b875f9a98df44f4a43ce2597/library/std/src/rt.rs:48:5
[INFO] [stderr]     27:     0x55cbe9503f6c - main
[INFO] [stderr]     28:     0x7fddf5e9c0b3 - __libc_start_main
[INFO] [stderr]     29:     0x55cbe9503cae - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "f6ea6e24fbb7a1627efe2501eab08b0ed3c02f064141f5681e6a3bf781442767", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6ea6e24fbb7a1627efe2501eab08b0ed3c02f064141f5681e6a3bf781442767", kill_on_drop: false }`
[INFO] [stdout] f6ea6e24fbb7a1627efe2501eab08b0ed3c02f064141f5681e6a3bf781442767