[INFO] fetching crate sarekt 0.0.4...
[INFO] testing sarekt-0.0.4 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate sarekt 0.0.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate sarekt 0.0.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate sarekt 0.0.4
[INFO] tweaked toml for crates.io crate sarekt 0.0.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sarekt 0.0.4 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sarekt 0.0.4 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c16560a17d601da71756f747167fd0760cea9ebe32a642bc796a58f4bb1aa591
[INFO] running `Command { std: "docker" "start" "-a" "c16560a17d601da71756f747167fd0760cea9ebe32a642bc796a58f4bb1aa591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c16560a17d601da71756f747167fd0760cea9ebe32a642bc796a58f4bb1aa591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c16560a17d601da71756f747167fd0760cea9ebe32a642bc796a58f4bb1aa591", kill_on_drop: false }`
[INFO] [stdout] c16560a17d601da71756f747167fd0760cea9ebe32a642bc796a58f4bb1aa591
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7059d9883943b9bd90a7c62a2e4630500af50074471593d8c432bdaeb1a98d6a
[INFO] running `Command { std: "docker" "start" "-a" "7059d9883943b9bd90a7c62a2e4630500af50074471593d8c432bdaeb1a98d6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling shaderc-sys v0.6.2
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr] warning: shaderc-sys@0.6.2: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: shaderc-sys@0.6.2: System installed library not found.  Falling back to build from source
[INFO] [stderr] error: failed to run custom build command for `shaderc-sys v0.6.2`
[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-783f0b087a30405a/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' (617) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/shaderc-sys-0.6.2/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:     0x56e0f3fb31b2 - std::backtrace_rs::backtrace::libunwind::trace::h589a96ef7638b383
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x56e0f3fb31b2 - std::backtrace_rs::backtrace::trace_unsynchronized::h23a30a7548c40de4
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x56e0f3fb31b2 - std::sys::backtrace::_print_fmt::h87dabd6535c8c07a
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x56e0f3fb31b2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hffd20ad4e5eca8ab
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x56e0f3fc346f - core::fmt::rt::Argument::fmt::h75c83e3fd5ce2419
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]      5:     0x56e0f3fc346f - core::fmt::write::h6d9d3a7cfd7b84f5
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]      6:     0x56e0f3f842c3 - std::io::default_write_fmt::ha7130bf70117e1da
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x56e0f3f842c3 - std::io::Write::write_fmt::h22459ad26fe60c51
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]      8:     0x56e0f3f8ec42 - std::sys::backtrace::BacktraceLock::print::hb28797143397220e
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x56e0f3f9150c - std::panicking::default_hook::{{closure}}::h7555113b62983743
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:301:27
[INFO] [stderr]     10:     0x56e0f3f91366 - std::panicking::default_hook::h2714b564abe8d914
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:328:9
[INFO] [stderr]     11:     0x56e0f3f91ae5 - std::panicking::panic_with_hook::h190dc82263685ec5
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:834:13
[INFO] [stderr]     12:     0x56e0f3f9197a - std::panicking::panic_handler::{{closure}}::h8b036a1b366643ac
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:707:13
[INFO] [stderr]     13:     0x56e0f3f8ed79 - std::sys::backtrace::__rust_end_short_backtrace::h45affcfc0c830da8
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x56e0f3f783ad - __rustc[9b67c8562bba447b]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:698:5
[INFO] [stderr]     15:     0x56e0f3fc6e80 - core::panicking::panic_fmt::hc084f85b1e76c16d
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/panicking.rs:75:14
[INFO] [stderr]     16:     0x56e0f3f33cbb - build_script_build::cmd_finder::CommandFinder::must_have::{{closure}}::h2ec123eb28c48662
[INFO] [stderr]     17:     0x56e0f3f38595 - core::option::Option<T>::unwrap_or_else::h3ba0e14708b36c5f
[INFO] [stderr]     18:     0x56e0f3f33c3c - build_script_build::cmd_finder::CommandFinder::must_have::h14aac074ee3ac948
[INFO] [stderr]     19:     0x56e0f3f368f1 - build_script_build::main::hc5a0742b5ed515ec
[INFO] [stderr]     20:     0x56e0f3f379b3 - core::ops::function::FnOnce::call_once::hc2e6d39ca89ea176
[INFO] [stderr]     21:     0x56e0f3f374d6 - std::sys::backtrace::__rust_begin_short_backtrace::h874d7d25f243c3d2
[INFO] [stderr]     22:     0x56e0f3f37409 - std::rt::lang_start::{{closure}}::h87b141275a06f395
[INFO] [stderr]     23:     0x56e0f3f85c60 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hcc75fa61d21ecbe5
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/ops/function.rs:290:21
[INFO] [stderr]     24:     0x56e0f3f85c60 - std::panicking::catch_unwind::do_call::h38c051a071ca3bc0
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:590:40
[INFO] [stderr]     25:     0x56e0f3f85c60 - std::panicking::catch_unwind::hede2a2f6f4519f78
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:553:19
[INFO] [stderr]     26:     0x56e0f3f85c60 - std::panic::catch_unwind::h94765a19f52c0a43
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panic.rs:359:14
[INFO] [stderr]     27:     0x56e0f3f85c60 - std::rt::lang_start_internal::{{closure}}::hb89c21d557706591
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/rt.rs:175:24
[INFO] [stderr]     28:     0x56e0f3f85c60 - std::panicking::catch_unwind::do_call::h50685f05733aeeef
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:590:40
[INFO] [stderr]     29:     0x56e0f3f85c60 - std::panicking::catch_unwind::hf9ba9716b02e6738
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panicking.rs:553:19
[INFO] [stderr]     30:     0x56e0f3f85c60 - std::panic::catch_unwind::h29770e281302b24d
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/panic.rs:359:14
[INFO] [stderr]     31:     0x56e0f3f85c60 - std::rt::lang_start_internal::hd5573b1f5f705a2a
[INFO] [stderr]                                  at /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/rt.rs:171:5
[INFO] [stderr]     32:     0x56e0f3f373f1 - std::rt::lang_start::hb528424d0eb44aa9
[INFO] [stderr]     33:     0x56e0f3f39ea5 - main
[INFO] [stderr]     34:     0x79436fcd81ca - <unknown>
[INFO] [stderr]     35:     0x79436fcd828b - __libc_start_main
[INFO] [stderr]     36:     0x56e0f3f32d75 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7059d9883943b9bd90a7c62a2e4630500af50074471593d8c432bdaeb1a98d6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7059d9883943b9bd90a7c62a2e4630500af50074471593d8c432bdaeb1a98d6a", kill_on_drop: false }`
[INFO] [stdout] 7059d9883943b9bd90a7c62a2e4630500af50074471593d8c432bdaeb1a98d6a