[INFO] fetching crate mats 2.0.1...
[INFO] testing mats-2.0.1 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate mats 2.0.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate mats 2.0.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mats 2.0.1
[INFO] tweaked toml for crates.io crate mats 2.0.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mats 2.0.1 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mats 2.0.1 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded find-msvc-tools v0.1.0
[INFO] [stderr]   Downloaded wit-bindgen v0.45.0
[INFO] [stderr]   Downloaded glutin-winit v0.5.0
[INFO] [stderr]   Downloaded cgl v0.3.2
[INFO] [stderr]   Downloaded gethostname v1.0.2
[INFO] [stderr]   Downloaded glutin_glx_sys v0.6.1
[INFO] [stderr]   Downloaded ravif v0.11.20
[INFO] [stderr]   Downloaded glutin_egl_sys v0.7.1
[INFO] [stderr]   Downloaded lebe v0.5.2
[INFO] [stderr]   Downloaded built v0.7.7
[INFO] [stderr]   Downloaded ab_glyph v0.2.31
[INFO] [stderr]   Downloaded memmap2 v0.9.8
[INFO] [stderr]   Downloaded xml-rs v0.8.27
[INFO] [stderr]   Downloaded polling v3.10.0
[INFO] [stderr]   Downloaded glutin v0.32.3
[INFO] [stderr]   Downloaded cc v1.2.35
[INFO] [stderr]   Downloaded indexmap v2.11.0
[INFO] [stderr]   Downloaded wasi v0.14.3+wasi-0.2.4
[INFO] [stderr]   Downloaded imgref v1.11.0
[INFO] [stderr]   Downloaded zune-jpeg v0.4.20
[INFO] [stderr]   Downloaded objc2-core-foundation v0.3.1
[INFO] [stderr]   Downloaded bitstream-io v2.6.0
[INFO] [stderr]   Downloaded gif v0.13.3
[INFO] [stderr]   Downloaded av1-grain v0.2.4
[INFO] [stderr]   Downloaded weezl v0.1.10
[INFO] [stderr]   Downloaded objc2 v0.6.2
[INFO] [stderr]   Downloaded exr v1.73.0
[INFO] [stderr]   Downloaded objc2-foundation v0.3.1
[INFO] [stderr]   Downloaded objc2-app-kit v0.3.1
[INFO] [stderr]   Downloaded glium v0.36.0
[INFO] [stderr]   Downloaded pxfm v0.1.20
[INFO] [stderr]   Downloaded orbclient v0.3.48
[INFO] [stderr]   Downloaded rav1e v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3adbdd8d02816b4834a7e18eb2f4c7ce36fb1c878fa8d9b6adbe7138c3f36e2d
[INFO] running `Command { std: "docker" "start" "-a" "3adbdd8d02816b4834a7e18eb2f4c7ce36fb1c878fa8d9b6adbe7138c3f36e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3adbdd8d02816b4834a7e18eb2f4c7ce36fb1c878fa8d9b6adbe7138c3f36e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3adbdd8d02816b4834a7e18eb2f4c7ce36fb1c878fa8d9b6adbe7138c3f36e2d", kill_on_drop: false }`
[INFO] [stdout] 3adbdd8d02816b4834a7e18eb2f4c7ce36fb1c878fa8d9b6adbe7138c3f36e2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90e39f0a1903445e85c254afc5376737d1234b453cfcbe804dc1b2b06e735433
[INFO] running `Command { std: "docker" "start" "-a" "90e39f0a1903445e85c254afc5376737d1234b453cfcbe804dc1b2b06e735433", kill_on_drop: false }`
[INFO] [stderr]    Compiling mats v2.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `mats v2.0.1 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/mats-cb982e96bf626135/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=README.md
[INFO] [stderr]   cargo:rerun-if-changed=RELEASE.md
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (40) panicked at build.rs:116:45:
[INFO] [stderr]   called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x577b6c74a84a - std[31e582c13f4e914f]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x577b6c74a84a - std[31e582c13f4e914f]::backtrace_rs::backtrace::trace_unsynchronized::<std[31e582c13f4e914f]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x577b6c74a84a - std[31e582c13f4e914f]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]      3:     0x577b6c74a84a - <<std[31e582c13f4e914f]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[fa0eadad68403074]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]      4:     0x577b6c75b82a - <core[fa0eadad68403074]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x577b6c75b82a - core[fa0eadad68403074]::fmt::write
[INFO] [stderr]      6:     0x577b6c74e6e2 - std[31e582c13f4e914f]::io::default_write_fmt::<std[31e582c13f4e914f]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x577b6c74e6e2 - <std[31e582c13f4e914f]::sys::stdio::unix::Stderr as std[31e582c13f4e914f]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]      8:     0x577b6c7359ef - <std[31e582c13f4e914f]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]      9:     0x577b6c7359ef - std[31e582c13f4e914f]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x577b6c7464b1 - std[31e582c13f4e914f]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x577b6c74666b - std[31e582c13f4e914f]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x577b6c735aa8 - std[31e582c13f4e914f]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x577b6c72ae69 - std[31e582c13f4e914f]::sys::backtrace::__rust_end_short_backtrace::<std[31e582c13f4e914f]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]     14:     0x577b6c73640d - __rustc[fc8e3a9f23f26cb]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x577b6c75bf7c - core[fa0eadad68403074]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x577b6c75bcf2 - core[fa0eadad68403074]::result::unwrap_failed
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/core/src/result.rs:1867:5
[INFO] [stderr]     17:     0x577b6c719968 - build_script_build[c26a71299fddaea2]::gen_crate_io_readme
[INFO] [stderr]     18:     0x577b6c71a189 - build_script_build[c26a71299fddaea2]::main
[INFO] [stderr]     19:     0x577b6c71d9e3 - <fn() as core[fa0eadad68403074]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     20:     0x577b6c71e1e6 - std[31e582c13f4e914f]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     21:     0x577b6c711159 - std[31e582c13f4e914f]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     22:     0x577b6c745af4 - <&dyn core[fa0eadad68403074]::ops::function::Fn<(), Output = i32> + core[fa0eadad68403074]::marker::Sync + core[fa0eadad68403074]::panic::unwind_safe::RefUnwindSafe as core[fa0eadad68403074]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     23:     0x577b6c745af4 - std[31e582c13f4e914f]::panicking::catch_unwind::do_call::<&dyn core[fa0eadad68403074]::ops::function::Fn<(), Output = i32> + core[fa0eadad68403074]::marker::Sync + core[fa0eadad68403074]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:581:40
[INFO] [stderr]     24:     0x577b6c745af4 - std[31e582c13f4e914f]::panicking::catch_unwind::<i32, &dyn core[fa0eadad68403074]::ops::function::Fn<(), Output = i32> + core[fa0eadad68403074]::marker::Sync + core[fa0eadad68403074]::panic::unwind_safe::RefUnwindSafe>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:544:19
[INFO] [stderr]     25:     0x577b6c745af4 - std[31e582c13f4e914f]::panic::catch_unwind::<&dyn core[fa0eadad68403074]::ops::function::Fn<(), Output = i32> + core[fa0eadad68403074]::marker::Sync + core[fa0eadad68403074]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panic.rs:359:14
[INFO] [stderr]     26:     0x577b6c745af4 - std[31e582c13f4e914f]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/rt.rs:175:24
[INFO] [stderr]     27:     0x577b6c745af4 - std[31e582c13f4e914f]::panicking::catch_unwind::do_call::<std[31e582c13f4e914f]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:581:40
[INFO] [stderr]     28:     0x577b6c745af4 - std[31e582c13f4e914f]::panicking::catch_unwind::<isize, std[31e582c13f4e914f]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panicking.rs:544:19
[INFO] [stderr]     29:     0x577b6c745af4 - std[31e582c13f4e914f]::panic::catch_unwind::<std[31e582c13f4e914f]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/panic.rs:359:14
[INFO] [stderr]     30:     0x577b6c745af4 - std[31e582c13f4e914f]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/562dee4820c458d823175268e41601d4c060588a/library/std/src/rt.rs:171:5
[INFO] [stderr]     31:     0x577b6c710bc1 - std[31e582c13f4e914f]::rt::lang_start::<()>
[INFO] [stderr]     32:     0x577b6c71de25 - main
[INFO] [stderr]     33:     0x75adc95d81ca - <unknown>
[INFO] [stderr]     34:     0x75adc95d828b - __libc_start_main
[INFO] [stderr]     35:     0x577b6c7100e5 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "90e39f0a1903445e85c254afc5376737d1234b453cfcbe804dc1b2b06e735433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90e39f0a1903445e85c254afc5376737d1234b453cfcbe804dc1b2b06e735433", kill_on_drop: false }`
[INFO] [stdout] 90e39f0a1903445e85c254afc5376737d1234b453cfcbe804dc1b2b06e735433