[INFO] updating cached repository Ran4/rocketblogblog
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Ran4/rocketblogblog
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Ran4/rocketblogblog" "work/ex/beta-1.37-6/sources/1.36.0/gh/Ran4/rocketblogblog"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Ran4/rocketblogblog'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Ran4/rocketblogblog" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ran4/rocketblogblog"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ran4/rocketblogblog'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 143098107de5bc8181efaab290ed131229a17542
[INFO] sha for GitHub repo Ran4/rocketblogblog: 143098107de5bc8181efaab290ed131229a17542
[INFO] validating manifest of Ran4/rocketblogblog on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Ran4/rocketblogblog on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Ran4/rocketblogblog
[INFO] finished frobbing Ran4/rocketblogblog
[INFO] frobbed toml for Ran4/rocketblogblog written to work/ex/beta-1.37-6/sources/1.36.0/gh/Ran4/rocketblogblog/Cargo.toml
[INFO] started frobbing Ran4/rocketblogblog
[INFO] finished frobbing Ran4/rocketblogblog
[INFO] frobbed toml for Ran4/rocketblogblog written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ran4/rocketblogblog/Cargo.toml
[INFO] crate Ran4/rocketblogblog already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Ran4/rocketblogblog against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ran4/rocketblogblog:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 495b1f8650e22e639c1462b82b0f7fd49370d4d7db13ba8b49be26a5504bf911
[INFO] running `"docker" "start" "-a" "495b1f8650e22e639c1462b82b0f7fd49370d4d7db13ba8b49be26a5504bf911"`
[INFO] [stderr]    Compiling pear v0.0.16
[INFO] [stderr]    Compiling rocket v0.3.10
[INFO] [stderr]    Compiling rocket_codegen v0.3.10
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling pear_codegen v0.0.16
[INFO] [stderr]    Compiling pq-sys v0.4.4
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.0.16`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/pear_codegen-066590fa1c03ee5d/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] Error: Pear requires a nightly or dev version of Rust.
[INFO] [stderr] Installed version is: 1.37.0-beta.6 (2019-07-22). Minimum required: 1.27.0-nightly (2018-04-14).
[INFO] [stderr] thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.16/build.rs:31:13
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x562d09898bdb - backtrace::backtrace::libunwind::trace::h5dfa5d4c5feed6dc
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x562d09898bdb - backtrace::backtrace::trace_unsynchronized::hb731fe64f3fa469f
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x562d09898bdb - std::sys_common::backtrace::_print::hf4fd45fe7ae4a250
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x562d09898bdb - std::sys_common::backtrace::print::h31646c3786c57441
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x562d09898bdb - std::panicking::default_hook::{{closure}}::hda785e768c746ae7
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x562d098988b7 - std::panicking::default_hook::h0c4b76f338614ef1
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x562d098992a0 - std::panicking::rust_panic_with_hook::h096dff2cb12b67ce
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x562d0986e044 - std::panicking::begin_panic::hce474d621d6c4e1e
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x562d0986c14b - build_script_build::main::h05b6d2ebbfe11bdf
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.16/build.rs:31
[INFO] [stderr]    9:     0x562d0986d450 - std::rt::lang_start::{{closure}}::h6dc8ef1e0ddf1c3a
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/rt.rs:64
[INFO] [stderr]   10:     0x562d09898cf3 - std::rt::lang_start_internal::{{closure}}::h055e1fdc5578d418
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   11:     0x562d09898cf3 - std::panicking::try::do_call::h480cafa68c9928b4
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   12:     0x562d0989efaa - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   13:     0x562d098997ad - std::panicking::try::he0549d0299de204a
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   14:     0x562d098997ad - std::panic::catch_unwind::h422dc2db98f03517
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   15:     0x562d098997ad - std::rt::lang_start_internal::h121de03325a3f900
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   16:     0x562d0986d429 - std::rt::lang_start::ha31098972764c8e6
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/rt.rs:64
[INFO] [stderr]   17:     0x562d0986cf0a - main
[INFO] [stderr]   18:     0x7f2a266b22e1 - __libc_start_main
[INFO] [stderr]   19:     0x562d0986ba8a - _start
[INFO] [stderr]   20:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "495b1f8650e22e639c1462b82b0f7fd49370d4d7db13ba8b49be26a5504bf911"`
[INFO] running `"docker" "rm" "-f" "495b1f8650e22e639c1462b82b0f7fd49370d4d7db13ba8b49be26a5504bf911"`
[INFO] [stdout] 495b1f8650e22e639c1462b82b0f7fd49370d4d7db13ba8b49be26a5504bf911