Node panics when CA certificates are missing

[the-smooth-operator]

In a fresh Debian/Ubuntu server or Docker image run Polkadot in dev mode polkadot --dev and the node panics.

2021-11-02 11:24:11 Running in --dev mode, RPC CORS has been disabled.
2021-11-02 11:24:11 Parity Polkadot
2021-11-02 11:24:11 ✌️  version 0.9.12-ec34cf7e0-x86_64-linux-gnu
2021-11-02 11:24:11 ❤️  by Parity Technologies <admin@parity.io>, 2017-2021
2021-11-02 11:24:11 📋 Chain specification: Development
2021-11-02 11:24:11 🏷 Node name: careful-train-9664
2021-11-02 11:24:11 👤 Role: AUTHORITY
2021-11-02 11:24:11 💾 Database: RocksDb at /data/chains/dev/db/full
2021-11-02 11:24:11 ⛓  Native runtime: polkadot-9120 (parity-polkadot-0.tx8.au0)
2021-11-02 11:24:11 👶 Creating empty BABE epoch changes on what appears to be first startup.
2021-11-02 11:24:11 🏷 Local node identity is: 12D3KooWArti2EWqvoPp5RTBJd3kERThbvauavJbzX5891MGEv6Q

====================

Version: 0.9.12-ec34cf7e0-x86_64-linux-gnu

   0: sp_panic_handler::set::{{closure}}
   1: std::panicking::rust_panic_with_hook
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panicking.rs:628:17
   2: std::panicking::begin_panic::{{closure}}
   3: std::sys_common::backtrace::__rust_end_short_backtrace
   4: std::panicking::begin_panic
   5: hyper_rustls::connector::HttpsConnector<hyper::client::connect::http::HttpConnector>::with_native_roots
   6: sc_offchain::api::http::SharedClient::new
   7: sc_offchain::OffchainWorkers<Client,Block>::new
   8: sc_service::builder::build_offchain_workers
   9: polkadot_service::new_full
  10: polkadot_service::build_full
  11: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
  12: tokio::park::thread::CachedParkThread::block_on
  13: tokio::runtime::thread_pool::ThreadPool::block_on
  14: tokio::runtime::Runtime::block_on
  15: sc_cli::runner::Runner<C>::run_node_until_exit
  16: polkadot_cli::command::run
  17: polkadot::main
  18: std::sys_common::backtrace::__rust_begin_short_backtrace
  19: std::rt::lang_start::{{closure}}
  20: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/core/src/ops/function.rs:259:13
      std::panicking::try::do_call
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panicking.rs:403:40
      std::panicking::try
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panicking.rs:367:19
      std::panic::catch_unwind
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panic.rs:129:14
      std::rt::lang_start_internal::{{closure}}
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/rt.rs:45:48
      std::panicking::try::do_call
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panicking.rs:403:40
      std::panicking::try
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panicking.rs:367:19
      std::panic::catch_unwind
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panic.rs:129:14
      std::rt::lang_start_internal
             at rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/rt.rs:45:20
  21: main
  22: __libc_start_main
  23: _start


Thread 'main' panicked at 'no CA certificates found', /usr/local/cargo/registry/src/github.amrom.workers.dev-1ecc6299db9ec823/hyper-rustls-0.22.1/src/connector.rs:45

This is a bug. Please report it at:

	https://github.com/paritytech/polkadot/issues/new

After installed missing certificates: apt-get install ca-certificates the node starts again.

The node should catch this and exit with a proper error message rather than panicking.

[bkchr]

Will be solved by: #4188