[INFO] fetching crate potential 2.1.0... [INFO] checking potential-2.1.0 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104 [INFO] extracting crate potential 2.1.0 into /workspace/builds/worker-9/source [INFO] validating manifest of crates.io crate potential 2.1.0 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate potential 2.1.0 [INFO] finished tweaking crates.io crate potential 2.1.0 [INFO] tweaked toml for crates.io crate potential 2.1.0 written to /workspace/builds/worker-9/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", 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] 26bcc83ad19bdc5123ea6b66b2398fc29dccdf2de6118890dc06d45876a20dd7 [INFO] running `Command { std: "docker" "start" "-a" "26bcc83ad19bdc5123ea6b66b2398fc29dccdf2de6118890dc06d45876a20dd7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "26bcc83ad19bdc5123ea6b66b2398fc29dccdf2de6118890dc06d45876a20dd7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "26bcc83ad19bdc5123ea6b66b2398fc29dccdf2de6118890dc06d45876a20dd7", kill_on_drop: false }` [INFO] [stdout] 26bcc83ad19bdc5123ea6b66b2398fc29dccdf2de6118890dc06d45876a20dd7 [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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9796fdf1a7be05e0ee2dbdf88c0049b4621f9a2d38c45fd528796a1c8e8d099d [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" "9796fdf1a7be05e0ee2dbdf88c0049b4621f9a2d38c45fd528796a1c8e8d099d", kill_on_drop: false }` [INFO] [stderr] Checking futures-core v0.3.5 [INFO] [stderr] Compiling potential v2.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Compiling syn v1.0.41 [INFO] [stderr] Checking futures-channel v0.3.5 [INFO] [stderr] error: failed to run custom build command for `potential v2.1.0 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/potential-19ce880608a0d0ef/build-script-build` (exit code: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-changed=src/lib.rs [INFO] [stderr] cargo:rerun-if-changed=README.tpl [INFO] [stderr] cargo:rerun-if-changed=Cargo.toml [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'create README.md: Os { code: 30, kind: Other, message: "Read-only file system" }', build.rs:8:55 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55fa56c912f0 - std::backtrace_rs::backtrace::libunwind::trace::h14e81b0c16b543a7 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96 [INFO] [stderr] 1: 0x55fa56c912f0 - std::backtrace_rs::backtrace::trace_unsynchronized::hc9e39e172835ff32 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/../../backtrace/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55fa56c912f0 - std::sys_common::backtrace::_print_fmt::h31994df1c8c77b8f [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:79 [INFO] [stderr] 3: 0x55fa56c912f0 - ::fmt::he74e98acff43ec99 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:58 [INFO] [stderr] 4: 0x55fa56cae0dc - core::fmt::write::h1857a60b204f1b6a [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/fmt/mod.rs:1080 [INFO] [stderr] 5: 0x55fa56c8ecd7 - std::io::Write::write_fmt::hea6289e6649ff508 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/io/mod.rs:1517 [INFO] [stderr] 6: 0x55fa56c93400 - std::sys_common::backtrace::_print::h8cc65937fea24014 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:61 [INFO] [stderr] 7: 0x55fa56c93400 - std::sys_common::backtrace::print::hff6a0ebb96535e34 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:48 [INFO] [stderr] 8: 0x55fa56c93400 - std::panicking::default_hook::{{closure}}::h71b9700c5dda1b1d [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:208 [INFO] [stderr] 9: 0x55fa56c9314c - std::panicking::default_hook::h0c46e634c06c69b6 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:227 [INFO] [stderr] 10: 0x55fa56c93a63 - std::panicking::rust_panic_with_hook::he52576a0c2093334 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:577 [INFO] [stderr] 11: 0x55fa56c93639 - std::panicking::begin_panic_handler::{{closure}}::h411c800b810762b2 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:484 [INFO] [stderr] 12: 0x55fa56c9177c - std::sys_common::backtrace::__rust_end_short_backtrace::ha657a272019e6aad [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:153 [INFO] [stderr] 13: 0x55fa56c935f9 - rust_begin_unwind [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:483 [INFO] [stderr] 14: 0x55fa56cad401 - core::panicking::panic_fmt::hb15d6f55e8472f62 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/panicking.rs:85 [INFO] [stderr] 15: 0x55fa56cad223 - core::option::expect_none_failed::he492a18657d97593 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/option.rs:1221 [INFO] [stderr] 16: 0x55fa56c79e46 - core::result::Result::expect::h2b1d2c15e82ddd31 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/result.rs:933 [INFO] [stderr] 17: 0x55fa56c7904d - build_script_build::main::hced51e620b3d9992 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:8 [INFO] [stderr] 18: 0x55fa56c72adb - core::ops::function::FnOnce::call_once::ha09f958f70a1abfc [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/ops/function.rs:227 [INFO] [stderr] 19: 0x55fa56c7a66e - std::sys_common::backtrace::__rust_begin_short_backtrace::he5c4de88cfb1f60e [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:137 [INFO] [stderr] 20: 0x55fa56c75db1 - std::rt::lang_start::{{closure}}::hb7dd0a2d7daa59cc [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/rt.rs:66 [INFO] [stderr] 21: 0x55fa56c93e61 - core::ops::function::impls:: for &F>::call_once::h009d20b8a620bf60 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/ops/function.rs:259 [INFO] [stderr] 22: 0x55fa56c93e61 - std::panicking::try::do_call::h09431c39e2107c90 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:381 [INFO] [stderr] 23: 0x55fa56c93e61 - std::panicking::try::he27cf60b958af343 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:345 [INFO] [stderr] 24: 0x55fa56c93e61 - std::panic::catch_unwind::h7b646b0041dc5591 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panic.rs:382 [INFO] [stderr] 25: 0x55fa56c93e61 - std::rt::lang_start_internal::hdad6c98af1e4747e [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/rt.rs:51 [INFO] [stderr] 26: 0x55fa56c75d87 - std::rt::lang_start::h9be73022eaa4f536 [INFO] [stderr] at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/rt.rs:65 [INFO] [stderr] 27: 0x55fa56c7932a - main [INFO] [stderr] 28: 0x7f275ce670b3 - __libc_start_main [INFO] [stderr] 29: 0x55fa56c700ae - _start [INFO] [stderr] 30: 0x0 - [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "9796fdf1a7be05e0ee2dbdf88c0049b4621f9a2d38c45fd528796a1c8e8d099d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9796fdf1a7be05e0ee2dbdf88c0049b4621f9a2d38c45fd528796a1c8e8d099d", kill_on_drop: false }` [INFO] [stdout] 9796fdf1a7be05e0ee2dbdf88c0049b4621f9a2d38c45fd528796a1c8e8d099d