[INFO] cloning repository https://github.com/the-sociophobic/tochka-dostupa-api [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/the-sociophobic/tochka-dostupa-api" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 08af558c46b52a6b8f2058c36d639f5e6421f8cd [INFO] testing the-sociophobic/tochka-dostupa-api against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/the-sociophobic/tochka-dostupa-api on toolchain 1871252fc8bb672d40787e67404e6eaae7059369 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/the-sociophobic/tochka-dostupa-api [INFO] finished tweaking git repo https://github.com/the-sociophobic/tochka-dostupa-api [INFO] tweaked toml for git repo https://github.com/the-sociophobic/tochka-dostupa-api written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/the-sociophobic/tochka-dostupa-api already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c83d42a335ade482f6cda9bbf3ed877473b8819ae9593fdbf57d0d2b35b198b9 [INFO] running `Command { std: "docker" "start" "-a" "c83d42a335ade482f6cda9bbf3ed877473b8819ae9593fdbf57d0d2b35b198b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c83d42a335ade482f6cda9bbf3ed877473b8819ae9593fdbf57d0d2b35b198b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c83d42a335ade482f6cda9bbf3ed877473b8819ae9593fdbf57d0d2b35b198b9", kill_on_drop: false }` [INFO] [stdout] c83d42a335ade482f6cda9bbf3ed877473b8819ae9593fdbf57d0d2b35b198b9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6a9b28b87d26f9c416be1afdceea96f08517d055e3af25a771a7cd50d1d80ad0 [INFO] running `Command { std: "docker" "start" "-a" "6a9b28b87d26f9c416be1afdceea96f08517d055e3af25a771a7cd50d1d80ad0", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.88 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling futures v0.1.31 [INFO] [stderr] Compiling byteorder v1.4.2 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.62 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling slab v0.4.2 [INFO] [stderr] Compiling fnv v1.0.7 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling scopeguard v1.1.0 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Compiling once_cell v1.7.2 [INFO] [stderr] Compiling lock_api v0.3.4 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling thread_local v1.1.3 [INFO] [stderr] Compiling matches v0.1.8 [INFO] [stderr] Compiling tinyvec_macros v0.1.0 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling regex-syntax v0.6.22 [INFO] [stderr] Compiling unicode-bidi v0.3.4 [INFO] [stderr] Compiling tinyvec v1.1.1 [INFO] [stderr] Compiling serde_derive v1.0.124 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling cc v1.0.67 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling smallvec v0.6.14 [INFO] [stderr] Compiling serde v1.0.124 [INFO] [stderr] Compiling aho-corasick v0.7.15 [INFO] [stderr] Compiling miniz_oxide v0.4.4 [INFO] [stderr] Compiling crunchy v0.2.2 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling failure_derive v0.1.8 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling bytes v0.4.12 [INFO] [stderr] Compiling num_cpus v1.13.0 [INFO] [stderr] Compiling net2 v0.2.37 [INFO] [stderr] Compiling proc-macro-hack v0.5.19 [INFO] [stderr] Compiling tokio-executor v0.1.10 [INFO] [stderr] Compiling tokio-sync v0.1.8 [INFO] [stderr] Compiling unicode-normalization v0.1.17 [INFO] [stderr] Compiling mio v0.6.23 [INFO] [stderr] Compiling tokio-io v0.1.13 [INFO] [stderr] Compiling tokio-timer v0.2.13 [INFO] [stderr] Compiling gimli v0.23.0 [INFO] [stderr] Compiling adler v1.0.2 [INFO] [stderr] Compiling tiny-keccak v2.0.2 [INFO] [stderr] Compiling itoa v0.4.7 [INFO] [stderr] Compiling getrandom v0.2.2 [INFO] [stderr] Compiling tokio-current-thread v0.1.7 [INFO] [stderr] Compiling threadpool v1.8.1 [INFO] [stderr] rustc-LLVM ERROR: IO failure on output stream: No space left on device [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/tmp/rustc1iZKt3" [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: failed to write `/opt/rustwide/target/debug/.fingerprint/tiny-keccak-23008b48feb64058/build-script-build-script-build.json` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] No space left on device (os error 28) [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `tokio-sync` (lib) due to 2 previous errors [INFO] [stderr] error: could not compile `aho-corasick` (lib) [INFO] [stderr] rustc-LLVM ERROR: IO failure on output stream: No space left on device [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetazfbZ8m" [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: error writing dependencies to `/opt/rustwide/target/debug/deps/gimli-d37e6dbbe79373ac.d`: No space left on device (os error 28) [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `parking_lot` (lib) [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetasfb7Og" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `tokio-timer` (lib) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetajLzjp6" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `gimli` (lib) due to 1 previous error [INFO] [stderr] error: could not compile `tokio-io` (lib) due to 1 previous error [INFO] [stderr] error: could not compile `threadpool` (lib) due to 1 previous error [INFO] [stdout] error: linking with `cc` failed: exit status: 1 [INFO] [stdout] | [INFO] [stdout] = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustc9nVjk9/symbols.o" "/opt/rustwide/target/debug/build/getrandom-45cce66b97b6fd9e/build_script_build-45cce66b97b6fd9e.build_script_build.8c87a36f85045087-cgu.0.rcgu.o" "/opt/rustwide/target/debug/build/getrandom-45cce66b97b6fd9e/build_script_build-45cce66b97b6fd9e.6igrzgy8z4ku7cydfzmlcy3hp.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-de48b8168d6cf4fa.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-9f3477fb95a0bba7.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-210d920812faea91.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-f3d3451767410a17.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-1a79dd36d08251de.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-886230e7120831b2.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-2caea079085a58a2.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-a9d7d97cdc65a449.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-5727477b0a78105a.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-7e555563aa211118.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-c8f13465f1a795b2.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-ee5b5774583426df.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-14df174c91007922.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-e8bfe52be756260a.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-6275035a459b3ada.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-b6892f3c52c68f01.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-f72b956e24d1de70.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-632ae0f28c5e55ff.rlib" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-e8b7e96e438f08f6.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/1871252fc8bb672d40787e67404e6eaae7059369/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/build/getrandom-45cce66b97b6fd9e/build_script_build-45cce66b97b6fd9e" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs" [INFO] [stdout] = note: /usr/bin/ld: final link failed: No space left on device [INFO] [stdout] collect2: error: ld returned 1 exit status [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `getrandom` (build script) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaMssMuF" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `tokio-current-thread` (lib) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetadtg3z1" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `mio` (lib) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaSAAX1i" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `unicode-normalization` (lib) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaSokXTI" [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaK08XVK" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `miniz_oxide` (lib) due to 1 previous error [INFO] [stderr] error: could not compile `regex-syntax` (lib) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaDJsksu" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `syn` (lib) due to 1 previous error [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetalkK37F" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `syn` (lib) due to 1 previous error [INFO] running `Command { std: "docker" "inspect" "6a9b28b87d26f9c416be1afdceea96f08517d055e3af25a771a7cd50d1d80ad0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6a9b28b87d26f9c416be1afdceea96f08517d055e3af25a771a7cd50d1d80ad0", kill_on_drop: false }` [INFO] [stdout] 6a9b28b87d26f9c416be1afdceea96f08517d055e3af25a771a7cd50d1d80ad0 [INFO] testing the-sociophobic/tochka-dostupa-api against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] fatal: could not create leading directories of '/workspace/builds/worker-4-tc2/source': No space left on device [INFO] testing the-sociophobic/tochka-dostupa-api against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] fatal: could not create leading directories of '/workspace/builds/worker-4-tc2/source': No space left on device [INFO] testing the-sociophobic/tochka-dostupa-api against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] fatal: could not create leading directories of '/workspace/builds/worker-4-tc2/source': No space left on device [INFO] testing the-sociophobic/tochka-dostupa-api against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] fatal: could not create leading directories of '/workspace/builds/worker-4-tc2/source': No space left on device [INFO] testing the-sociophobic/tochka-dostupa-api against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-sociophobic%2Ftochka-dostupa-api" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] fatal: could not create leading directories of '/workspace/builds/worker-4-tc2/source': No space left on device [ERROR] this task or one of its parent failed! [ERROR] failed to checkout https://github.com/the-sociophobic/tochka-dostupa-api [ERROR] caused by: command failed: exit status: 128 [ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.