thread '<unnamed>' panicked at 'attempt to subtract with overflow'

[ttiimm]

I'm hitting an issue trying to run simple-server=0.4.0 on Apple M2 hardware. I get this failure when trying to run the example, then making a request. I know the architecture isn't fully supported yet, but thought I'd bring the issue up.

Rust and Cargo versions

$ rustc -V
rustc 1.63.0 (4b91a6ea7 2022-08-08)

$ cargo -V
cargo 1.63.0 (fd9c4297c 2022-07-01)

Steps to Reproduce

1. Run the example. $ RUST_BACKTRACE=1 UST_LOG="simple_server=info" cargo run
2. Make a request to the server. $ curl localhost:7878

Note: also tried compiling with --target x86_64-apple-darwin option, but similar failure observed.

Another note: when running with version 0.3.0 I receive this message on the client side.

$ curl -v localhost:7878
*   Trying 127.0.0.1:7878...
* Connected to localhost (127.0.0.1) port 7878 (#0)
> GET / HTTP/1.1
> Host: localhost:7878
> User-Agent: curl/7.79.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
* no chunk, no close, no size. Assume close to signal end
<
* Closing connection 0
Hello Rust!%

Result

thread '<unnamed>' panicked at 'attempt to subtract with overflow', /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:75:17
stack backtrace:
   0: rust_begin_unwind
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/panicking.rs:142:14
   2: core::panicking::panic
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/panicking.rs:48:5
   3: simple_server::parsing::slice_indices
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:75:17
   4: simple_server::parsing::try_parse_request::{{closure}}
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:94:30
   5: core::option::Option<T>::map
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/option.rs:929:29
   6: simple_server::parsing::try_parse_request
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:88:9
   7: simple_server::request::read
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/request.rs:29:23
   8: simple_server::Server::handle_connection
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:342:29
   9: simple_server::Server::listen_on_socket::{{closure}}::{{closure}}
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:266:21
  10: <F as scoped_threadpool::FnBox>::call_box
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:71:9
  11: scoped_threadpool::Pool::new::{{closure}}
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:127:29
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
thread 'main' panicked at 'Thread pool worker panicked', /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:236:13
stack backtrace:
   0: std::panicking::begin_panic
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:616:12
   1: scoped_threadpool::Scope::join_all
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:236:13
   2: <scoped_threadpool::Scope as core::ops::drop::Drop>::drop
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:248:9
   3: core::ptr::drop_in_place<scoped_threadpool::Scope>
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/ptr/mod.rs:487:1
   4: scoped_threadpool::Pool::scoped
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:182:5
   5: simple_server::Server::listen_on_socket
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:264:13
   6: simple_server::Server::listen
             at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:216:9
   7: sub_bug::main
             at ./main.rs:20:5
   8: core::ops::function::FnOnce::call_once
             at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
tim:src$ RUST_BACKTRACE=full RUST_LOG="simple_server=info" cargo run
    Finished dev [unoptimized + debuginfo] target(s) in 0.02s
     Running `/Users/tim/Projects/sub-bug/target/debug/sub-bug`
[2022-09-22T02:23:48Z INFO  simple_server] Server started at http://127.0.0.1:7878
thread '<unnamed>' panicked at 'attempt to subtract with overflow', /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:75:17
stack backtrace:
   0:        0x104c80044 - std::backtrace_rs::backtrace::libunwind::trace::hd589abd6c35ac4ad
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:        0x104c80044 - std::backtrace_rs::backtrace::trace_unsynchronized::h98ffcaaa5ca3fa1b
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:        0x104c80044 - std::sys_common::backtrace::_print_fmt::h6d737d3ee2f9b02c
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:66:5
   3:        0x104c80044 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h188b7ef1c7993e78
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:45:22
   4:        0x104c946e0 - core::fmt::write::he84a3004e7af3f34
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/fmt/mod.rs:1197:17
   5:        0x104c7c320 - std::io::Write::write_fmt::h9370b50affaab0be
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/io/mod.rs:1672:15
   6:        0x104c81790 - std::sys_common::backtrace::_print::h6a312acaf6239500
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:48:5
   7:        0x104c81790 - std::sys_common::backtrace::print::h8d70f4e1fc358fa6
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:35:9
   8:        0x104c81790 - std::panicking::default_hook::{{closure}}::hc074f8023cce83ca
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:295:22
   9:        0x104c814f8 - std::panicking::default_hook::hef854b51b9b79ff2
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:314:9
  10:        0x104c81c28 - std::panicking::rust_panic_with_hook::h1e59e224d558a492
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:698:17
  11:        0x104c81b24 - std::panicking::begin_panic_handler::{{closure}}::he1a9d6ab32bfd8c6
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:586:13
  12:        0x104c80520 - std::sys_common::backtrace::__rust_end_short_backtrace::he9b94791b02f48cd
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:138:18
  13:        0x104c818b4 - rust_begin_unwind
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:584:5
  14:        0x104c9e7d4 - core::panicking::panic_fmt::h9fec86f6a9c4146e
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/panicking.rs:142:14
  15:        0x104c9e6f4 - core::panicking::panic::h02e9fc642940f2ec
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/panicking.rs:48:5
  16:        0x104a89734 - simple_server::parsing::slice_indices::hc3c776bbe929cb8b
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:75:17
  17:        0x104a89d44 - simple_server::parsing::try_parse_request::{{closure}}::h9fe53280499b300c
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:94:30
  18:        0x104a8cb74 - core::option::Option<T>::map::hda636feb7f6dc9d9
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/option.rs:929:29
  19:        0x104a89974 - simple_server::parsing::try_parse_request::h3b6e4200170f46d1
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/parsing.rs:88:9
  20:        0x104a93344 - simple_server::request::read::ha76989050445174e
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/request.rs:29:23
  21:        0x104a8f038 - simple_server::Server::handle_connection::h21baa854353235a7
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:342:29
  22:        0x104a8ee14 - simple_server::Server::listen_on_socket::{{closure}}::{{closure}}::h07765d107bb2ed9c
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:266:21
  23:        0x104a8e8e4 - <F as scoped_threadpool::FnBox>::call_box::h0cc54b5b40dd4c90
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:71:9
  24:        0x104aac9ec - scoped_threadpool::Pool::new::{{closure}}::h34e0f79f9eb4a6e4
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:127:29
  25:        0x104aaa4ec - std::sys_common::backtrace::__rust_begin_short_backtrace::h2e03fc55c4c75cf5
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:122:18
  26:        0x104ac98e0 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h74d4c2061fde0796
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/thread/mod.rs:505:17
  27:        0x104aaf7e0 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hf68d20fa7c37ed28
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/panic/unwind_safe.rs:271:9
  28:        0x104ab53fc - std::panicking::try::do_call::h764f00442f379600
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:492:40
  29:        0x104aba110 - ___rust_try
  30:        0x104ab5278 - std::panicking::try::h4112cb0ecbd1fa47
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:456:19
  31:        0x104ab5134 - std::panic::catch_unwind::h81ffba7c9f2a3029
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panic.rs:137:14
  32:        0x104ac9760 - std::thread::Builder::spawn_unchecked_::{{closure}}::h85fbef53653ecb7c
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/thread/mod.rs:504:30
  33:        0x104ab578c - core::ops::function::FnOnce::call_once{{vtable.shim}}::h60c2625151a0f6cc
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/ops/function.rs:248:5
  34:        0x104c83ea0 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h89934fef96b83268
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/alloc/src/boxed.rs:1951:9
  35:        0x104c83ea0 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h2c579033340f7d2e
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/alloc/src/boxed.rs:1951:9
  36:        0x104c83ea0 - std::sys::unix::thread::Thread::new::thread_start::h7b2f9b83fb320a20
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys/unix/thread.rs:108:17
  37:        0x1b5ecc26c - __pthread_deallocate
thread 'main' panicked at 'Thread pool worker panicked', /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:236:13
stack backtrace:
   0:        0x104c80044 - std::backtrace_rs::backtrace::libunwind::trace::hd589abd6c35ac4ad
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:        0x104c80044 - std::backtrace_rs::backtrace::trace_unsynchronized::h98ffcaaa5ca3fa1b
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:        0x104c80044 - std::sys_common::backtrace::_print_fmt::h6d737d3ee2f9b02c
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:66:5
   3:        0x104c80044 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h188b7ef1c7993e78
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:45:22
   4:        0x104c946e0 - core::fmt::write::he84a3004e7af3f34
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/fmt/mod.rs:1197:17
   5:        0x104c7c320 - std::io::Write::write_fmt::h9370b50affaab0be
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/io/mod.rs:1672:15
   6:        0x104c81790 - std::sys_common::backtrace::_print::h6a312acaf6239500
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:48:5
   7:        0x104c81790 - std::sys_common::backtrace::print::h8d70f4e1fc358fa6
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:35:9
   8:        0x104c81790 - std::panicking::default_hook::{{closure}}::hc074f8023cce83ca
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:295:22
   9:        0x104c814f8 - std::panicking::default_hook::hef854b51b9b79ff2
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:314:9
  10:        0x104c81c28 - std::panicking::rust_panic_with_hook::h1e59e224d558a492
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:698:17
  11:        0x104ab51e4 - std::panicking::begin_panic::{{closure}}::h7aa8fbd1e0dbbff5
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:617:9
  12:        0x104aaa498 - std::sys_common::backtrace::__rust_end_short_backtrace::hf579749161a515aa
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:138:18
  13:        0x104c9998c - std::panicking::begin_panic::h1a2b26fbbb829b3e
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:616:12
  14:        0x104aacca8 - scoped_threadpool::Scope::join_all::hece099d905b0a738
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:236:13
  15:        0x104aacd3c - <scoped_threadpool::Scope as core::ops::drop::Drop>::drop::hf0bd3d47223e93b1
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:248:9
  16:        0x104a8bad0 - core::ptr::drop_in_place<scoped_threadpool::Scope>::hb3e01b8d290b1f38
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/ptr/mod.rs:487:1
  17:        0x104a8a074 - scoped_threadpool::Pool::scoped::hf779aafe3b4aa319
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped_threadpool-0.1.9/src/lib.rs:182:5
  18:        0x104a8ed80 - simple_server::Server::listen_on_socket::h8efaa5ce35c92603
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:264:13
  19:        0x104a8eb1c - simple_server::Server::listen::h14cb3c271696b297
                               at /Users/tim/.cargo/registry/src/github.com-1ecc6299db9ec823/simple-server-0.4.0/src/lib.rs:216:9
  20:        0x104a83490 - sub_bug::main::h4aec0d84fca3fb8f
                               at /Users/tim/Projects/sub-bug/src/main.rs:20:5
  21:        0x104a83c68 - core::ops::function::FnOnce::call_once::h8626f35a81e27db4
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/ops/function.rs:248:5
  22:        0x104a844dc - std::sys_common::backtrace::__rust_begin_short_backtrace::hfaa75fdf811ede2b
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/sys_common/backtrace.rs:122:18
  23:        0x104a83564 - std::rt::lang_start::{{closure}}::h693ee15618a2ca4e
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/rt.rs:145:18
  24:        0x104c78000 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h6091bdce585e0c9c
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/core/src/ops/function.rs:280:13
  25:        0x104c78000 - std::panicking::try::do_call::h2dde559bd47c537c
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:492:40
  26:        0x104c78000 - std::panicking::try::h0be0a0414f498150
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:456:19
  27:        0x104c78000 - std::panic::catch_unwind::h0dbebda9c8fcb6e3
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panic.rs:137:14
  28:        0x104c78000 - std::rt::lang_start_internal::{{closure}}::h70683b79d9154b98
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/rt.rs:128:48
  29:        0x104c78000 - std::panicking::try::do_call::h60888734191539e8
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:492:40
  30:        0x104c78000 - std::panicking::try::h212200e2cf152f8d
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panicking.rs:456:19
  31:        0x104c78000 - std::panic::catch_unwind::hf4ae91ebdc2dedaf
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/panic.rs:137:14
  32:        0x104c78000 - std::rt::lang_start_internal::h92a00ef694077615
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/rt.rs:128:20
  33:        0x104a8352c - std::rt::lang_start::h00b3962a31a0c1d3
                               at /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/std/src/rt.rs:144:17
  34:        0x104a834e0 - _main

[zvolin]

This is due to the behavior of httparse library.

When parsing a request with httparse, the returned request's method part is defined as Option<&'buf str> and here simple-server assumes that the reference points to the buffer's memory, however it is just a statically allocated str somewhere outside of a buffer, thus pointer arithmetic performed is invalid

[zvolin]

I am not sure whether this crate is still maintained, last merged PR was like 4 years ago? At least the method part should be reallocated during request parsing however from httparse docs it doesn't guarantee that any of returned slice is pointing to the buffer, only that those are str slices with lifetimes at least as long as buffer's one. For me it's relying on internals of the httparse dependency

[ttiimm]

I am not sure whether this crate is still maintained, last merged PR was like 4 years ago?

Yeah, I ended up swapping out the crate with tiny-http, but thought I'd open a bug in case development starts back up again.