jdavis@jdavis:~/wd/postgres-extension.rs/examples/udf-spi (master)$ rustc --versi[50/1944] ose rustc 1.35.0 (3c235d560 2019-05-20) binary: rustc commit-hash: 3c235d5600393dfe6c36eeed34042efad8d4f26e commit-date: 2019-05-20 host: x86_64-unknown-linux-gnu release: 1.35.0 LLVM version: 8.0 jdavis@jdavis:~/wd/postgres-extension.rs/examples/udf-spi (master)$ RUST_BACKTRACE=1 cargo build Compiling udf-spi v0.1.0 (/home/jdavis/wd/postgres-extension.rs/examples/udf-spi) error: internal compiler error: src/librustc/dep_graph/graph.rs:688: DepNode Hir(udf_spi[fd57]::udf_spi[0]::{{misc}}[1]::{{misc}}[0]) should have been pre-allocated but wasn't. thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:635:9 note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace. stack backtrace: 0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39 1: std::sys_common::backtrace::_print at src/libstd/sys_common/backtrace.rs:71 2: std::panicking::default_hook::{{closure}} at src/libstd/sys_common/backtrace.rs:59 at src/libstd/panicking.rs:197 3: std::panicking::default_hook at src/libstd/panicking.rs:211 4: rustc::util::common::panic_hook 5: std::panicking::rust_panic_with_hook at src/libstd/panicking.rs:478 6: std::panicking::begin_panic 7: rustc_errors::Handler::bug 8: rustc::util::bug::opt_span_bug_fmt::{{closure}} 9: rustc::ty::context::tls::with_opt::{{closure}} 10: rustc::ty::context::tls::with_context_opt 11: rustc::ty::context::tls::with_opt 12: rustc::util::bug::opt_span_bug_fmt 13: rustc::util::bug::bug_fmt 14: rustc::dep_graph::graph::DepGraph::try_mark_previous_green 15: rustc::dep_graph::graph::DepGraph::try_mark_green 16: rustc::dep_graph::graph::DepGraph::try_mark_green_and_read 17: rustc_typeck::impl_wf_check::impl_wf_check 18: rustc::util::common::time 19: rustc_typeck::check_crate 20: rustc_interface::passes::analysis 21: rustc::ty::query::__query_compute::analysis 22: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::analysis>::compute 23: rustc::dep_graph::graph::DepGraph::with_task_impl 24: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query 25: rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}} 26: rustc_interface::passes::create_global_ctxt::{{closure}} 27: rustc_interface::interface::run_compiler_in_existing_thread_pool 28: std::thread::local::LocalKey<T>::with 29: scoped_tls::ScopedKey<T>::set 30: syntax::with_globals query stack during panic: #0 [analysis] running analysis passes on this crate end of query stack error: aborting due to previous error note: the compiler unexpectedly panicked. this is a bug. note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports note: rustc 1.35.0 (3c235d560 2019-05-20) running on x86_64-unknown-linux-gnu note: compiler flags: -C debuginfo=2 -C incremental --crate-type cdylib note: some of the compiler flags provided by cargo are hidden error: Could not compile `udf-spi`. To learn more, run the command again with --verbose.