[INFO] updating cached repository coder543/u [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/coder543/u [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/coder543/u" "work/ex/beta-1.37-6/sources/1.36.0/gh/coder543/u"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/coder543/u'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/coder543/u" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/coder543/u"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/coder543/u'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 8c72018fb7743abe42976845be7c8919eac21380 [INFO] sha for GitHub repo coder543/u: 8c72018fb7743abe42976845be7c8919eac21380 [INFO] validating manifest of coder543/u 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 coder543/u 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 coder543/u [INFO] finished frobbing coder543/u [INFO] frobbed toml for coder543/u written to work/ex/beta-1.37-6/sources/1.36.0/gh/coder543/u/Cargo.toml [INFO] started frobbing coder543/u [INFO] finished frobbing coder543/u [INFO] frobbed toml for coder543/u written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/coder543/u/Cargo.toml [INFO] crate coder543/u 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 coder543/u against 1.36.0 for beta-1.37-6 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/coder543/u:/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" "+1.36.0" "build" "--frozen"` [INFO] [stdout] aa4e40bfd1e809ed09e8edb073e633d0efc85f18f9c46fce625439f27158a25e [INFO] running `"docker" "start" "-a" "aa4e40bfd1e809ed09e8edb073e633d0efc85f18f9c46fce625439f27158a25e"` [INFO] [stderr] Compiling serde v1.0.19 [INFO] [stderr] Compiling u v0.1.0 (/opt/crater/workdir) [INFO] [stderr] Compiling openssl v0.9.20 [INFO] [stderr] Compiling url v1.6.0 [INFO] [stderr] Compiling mime_guess v2.0.0-alpha.2 [INFO] [stderr] Compiling hyper v0.11.6 [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-1.6.0/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] [INFO] [stderr] error: failed to run custom build command for `mime_guess v2.0.0-alpha.2` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/mime_guess-942dac8a2c832873/build-script-gen_mime_types` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:999:5 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55d2598b8dd3 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55 [INFO] [stderr] at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39 [INFO] [stderr] 1: 0x55d2598b49eb - std::sys_common::backtrace::_print::h49a82ae9552e35c7 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:71 [INFO] [stderr] 2: 0x55d2598b7c46 - std::panicking::default_hook::{{closure}}::he20974adbefcc046 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] at src/libstd/panicking.rs:197 [INFO] [stderr] 3: 0x55d2598b79d9 - std::panicking::default_hook::he4af6af4ac7fef7b [INFO] [stderr] at src/libstd/panicking.rs:211 [INFO] [stderr] 4: 0x55d2598b829f - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f [INFO] [stderr] at src/libstd/panicking.rs:474 [INFO] [stderr] 5: 0x55d2598b7e21 - std::panicking::continue_panic_fmt::ha6d6ae144369025b [INFO] [stderr] at src/libstd/panicking.rs:381 [INFO] [stderr] 6: 0x55d2598b7d05 - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:308 [INFO] [stderr] 7: 0x55d2598c8b7c - core::panicking::panic_fmt::hc4f83bfed80aeabd [INFO] [stderr] at src/libcore/panicking.rs:85 [INFO] [stderr] 8: 0x55d2598a9a97 - core::result::unwrap_failed::he3c33d01692388cd [INFO] [stderr] at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/macros.rs:18 [INFO] [stderr] 9: 0x55d25987617a - core::result::Result::unwrap::h25368ef746b19c80 [INFO] [stderr] at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/result.rs:800 [INFO] [stderr] 10: 0x55d259881374 - build_script_gen_mime_types::main::h096388df3cbd4066 [INFO] [stderr] at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/mime_guess-2.0.0-alpha.2/src/gen_mime_types.rs:22 [INFO] [stderr] 11: 0x55d2598a02bf - std::rt::lang_start::{{closure}}::h02807cb18e9a3940 [INFO] [stderr] at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64 [INFO] [stderr] 12: 0x55d2598b7cf2 - std::panicking::try::do_call::hc3d8373a0b215f51 [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] at src/libstd/panicking.rs:293 [INFO] [stderr] 13: 0x55d2598ba229 - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:85 [INFO] [stderr] 14: 0x55d2598b87ac - std::rt::lang_start_internal::he5218c8b95d395f2 [INFO] [stderr] at src/libstd/panicking.rs:272 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 15: 0x55d2598a0298 - std::rt::lang_start::hf6cc46d2be4686e2 [INFO] [stderr] at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64 [INFO] [stderr] 16: 0x55d2598829b9 - main [INFO] [stderr] 17: 0x7f1a78a072e0 - __libc_start_main [INFO] [stderr] 18: 0x55d259856589 - _start [INFO] [stderr] 19: 0x0 - [INFO] [stderr] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "aa4e40bfd1e809ed09e8edb073e633d0efc85f18f9c46fce625439f27158a25e"` [INFO] running `"docker" "rm" "-f" "aa4e40bfd1e809ed09e8edb073e633d0efc85f18f9c46fce625439f27158a25e"` [INFO] [stdout] aa4e40bfd1e809ed09e8edb073e633d0efc85f18f9c46fce625439f27158a25e