[INFO] cloning repository https://github.com/LesleyLai/webgpu-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LesleyLai/webgpu-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLesleyLai%2Fwebgpu-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLesleyLai%2Fwebgpu-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cd14badf5f6dfda52f53c1d8f89c7f5133a4186
[INFO] checking LesleyLai/webgpu-experiments against try#db4e1d23234d93b5e96ecc768b35d9090c32cddf for pr-149901
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLesleyLai%2Fwebgpu-experiments" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LesleyLai/webgpu-experiments
[INFO] finished tweaking git repo https://github.com/LesleyLai/webgpu-experiments
[INFO] tweaked toml for git repo https://github.com/LesleyLai/webgpu-experiments written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LesleyLai/webgpu-experiments on toolchain db4e1d23234d93b5e96ecc768b35d9090c32cddf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LesleyLai/webgpu-experiments 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" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "fetch" "--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
[ERROR] error running command: no output for 300 seconds
[INFO] checking LesleyLai/webgpu-experiments against try#db4e1d23234d93b5e96ecc768b35d9090c32cddf for pr-149901
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLesleyLai%2Fwebgpu-experiments" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LesleyLai/webgpu-experiments
[INFO] finished tweaking git repo https://github.com/LesleyLai/webgpu-experiments
[INFO] tweaked toml for git repo https://github.com/LesleyLai/webgpu-experiments written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LesleyLai/webgpu-experiments on toolchain db4e1d23234d93b5e96ecc768b35d9090c32cddf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LesleyLai/webgpu-experiments 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" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "fetch" "--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] [stderr]  Downloading crates ...
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[INFO] [stderr]   Downloaded ndk-glue v0.2.1
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[INFO] [stderr]   Downloaded pin-project v1.0.1
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[INFO] [stderr]   Downloaded thiserror v1.0.21
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[INFO] [stderr]   Downloaded gfx-backend-dx11 v0.6.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 669d5ac3fbec54e0da31823fe8a0b460daad747aafd5465952e6ad88c9ad0207
[INFO] running `Command { std: "docker" "start" "-a" "669d5ac3fbec54e0da31823fe8a0b460daad747aafd5465952e6ad88c9ad0207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "669d5ac3fbec54e0da31823fe8a0b460daad747aafd5465952e6ad88c9ad0207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "669d5ac3fbec54e0da31823fe8a0b460daad747aafd5465952e6ad88c9ad0207", kill_on_drop: false }`
[INFO] [stdout] 669d5ac3fbec54e0da31823fe8a0b460daad747aafd5465952e6ad88c9ad0207
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db4e1d23234d93b5e96ecc768b35d9090c32cddf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 247a714cec46c534c06c129f38f0781c4a7650346430402a9f49466652e7b3e3
[INFO] running `Command { std: "docker" "start" "-a" "247a714cec46c534c06c129f38f0781c4a7650346430402a9f49466652e7b3e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]     Checking libloading v0.6.5
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]     Checking slab v0.4.2
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[INFO] [stderr]     Checking dlib v0.4.2
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[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
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[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
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[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking tobj v2.0.2
[INFO] [stderr] warning: shaderc-sys@0.6.3: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: shaderc-sys@0.6.3: System installed library not found.  Falling back to build from source
[INFO] [stderr] error: failed to run custom build command for `shaderc-sys v0.6.3`
[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/shaderc-sys-5b2ed61ef8a91383/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:warning=Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr]   cargo:warning=System installed library not found.  Falling back to build from source
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (2174) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/shaderc-sys-0.6.3/build/cmd_finder.rs:50:13:
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   couldn't find required command: "python"
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x609b7c696d82 - std[92507fd11fb02705]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x609b7c696d82 - std[92507fd11fb02705]::backtrace_rs::backtrace::trace_unsynchronized::<std[92507fd11fb02705]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x609b7c696d82 - std[92507fd11fb02705]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/sys/backtrace.rs:68:9
[INFO] [stderr]      3:     0x609b7c696d82 - <<std[92507fd11fb02705]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[922c666444452093]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/sys/backtrace.rs:38:26
[INFO] [stderr]      4:     0x609b7c6ab637 - <core[922c666444452093]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x609b7c6ab637 - core[922c666444452093]::fmt::write
[INFO] [stderr]      6:     0x609b7c69d416 - std[92507fd11fb02705]::io::default_write_fmt::<std[92507fd11fb02705]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/io/mod.rs:614:11
[INFO] [stderr]      7:     0x609b7c69d416 - <std[92507fd11fb02705]::sys::stdio::unix::Stderr as std[92507fd11fb02705]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/io/mod.rs:1969:13
[INFO] [stderr]      8:     0x609b7c678cff - <std[92507fd11fb02705]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/sys/backtrace.rs:41:9
[INFO] [stderr]      9:     0x609b7c678cff - std[92507fd11fb02705]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x609b7c691b61 - std[92507fd11fb02705]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x609b7c691d1b - std[92507fd11fb02705]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x609b7c678db8 - std[92507fd11fb02705]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x609b7c6706d9 - std[92507fd11fb02705]::sys::backtrace::__rust_end_short_backtrace::<std[92507fd11fb02705]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/sys/backtrace.rs:176:18
[INFO] [stderr]     14:     0x609b7c67981d - __rustc[38111b44b8b393d5]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x609b7c6abc7c - core[922c666444452093]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x609b7c6199e6 - <build_script_build[f71093821dc77cda]::cmd_finder::CommandFinder>::must_have::<&str>::{closure#0}
[INFO] [stderr]     17:     0x609b7c617fc9 - <core[922c666444452093]::option::Option<std[92507fd11fb02705]::path::PathBuf>>::unwrap_or_else::<<build_script_build[f71093821dc77cda]::cmd_finder::CommandFinder>::must_have<&str>::{closure#0}>
[INFO] [stderr]     18:     0x609b7c61832c - <build_script_build[f71093821dc77cda]::cmd_finder::CommandFinder>::must_have::<&str>
[INFO] [stderr]     19:     0x609b7c61d216 - build_script_build[f71093821dc77cda]::main
[INFO] [stderr]     20:     0x609b7c61f673 - <fn() as core[922c666444452093]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     21:     0x609b7c618ed6 - std[92507fd11fb02705]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     22:     0x609b7c619a09 - std[92507fd11fb02705]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     23:     0x609b7c690ca6 - <&dyn core[922c666444452093]::ops::function::Fn<(), Output = i32> + core[922c666444452093]::panic::unwind_safe::RefUnwindSafe + core[922c666444452093]::marker::Sync as core[922c666444452093]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     24:     0x609b7c690ca6 - std[92507fd11fb02705]::panicking::catch_unwind::do_call::<&dyn core[922c666444452093]::ops::function::Fn<(), Output = i32> + core[922c666444452093]::panic::unwind_safe::RefUnwindSafe + core[922c666444452093]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:581:40
[INFO] [stderr]     25:     0x609b7c690ca6 - std[92507fd11fb02705]::panicking::catch_unwind::<i32, &dyn core[922c666444452093]::ops::function::Fn<(), Output = i32> + core[922c666444452093]::panic::unwind_safe::RefUnwindSafe + core[922c666444452093]::marker::Sync>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:544:19
[INFO] [stderr]     26:     0x609b7c690ca6 - std[92507fd11fb02705]::panic::catch_unwind::<&dyn core[922c666444452093]::ops::function::Fn<(), Output = i32> + core[922c666444452093]::panic::unwind_safe::RefUnwindSafe + core[922c666444452093]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panic.rs:359:14
[INFO] [stderr]     27:     0x609b7c690ca6 - std[92507fd11fb02705]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/rt.rs:175:24
[INFO] [stderr]     28:     0x609b7c690ca6 - std[92507fd11fb02705]::panicking::catch_unwind::do_call::<std[92507fd11fb02705]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:581:40
[INFO] [stderr]     29:     0x609b7c690ca6 - std[92507fd11fb02705]::panicking::catch_unwind::<isize, std[92507fd11fb02705]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panicking.rs:544:19
[INFO] [stderr]     30:     0x609b7c690ca6 - std[92507fd11fb02705]::panic::catch_unwind::<std[92507fd11fb02705]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/panic.rs:359:14
[INFO] [stderr]     31:     0x609b7c690ca6 - std[92507fd11fb02705]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/db4e1d23234d93b5e96ecc768b35d9090c32cddf/library/std/src/rt.rs:171:5
[INFO] [stderr]     32:     0x609b7c618ec1 - std[92507fd11fb02705]::rt::lang_start::<()>
[INFO] [stderr]     33:     0x609b7c61f7f5 - main
[INFO] [stderr]     34:     0x7ee2fe3561ca - <unknown>
[INFO] [stderr]     35:     0x7ee2fe35628b - __libc_start_main
[INFO] [stderr]     36:     0x609b7c617445 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "247a714cec46c534c06c129f38f0781c4a7650346430402a9f49466652e7b3e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "247a714cec46c534c06c129f38f0781c4a7650346430402a9f49466652e7b3e3", kill_on_drop: false }`
[INFO] [stdout] 247a714cec46c534c06c129f38f0781c4a7650346430402a9f49466652e7b3e3