Zola: Panicked at 'called `Option::unwrap()` on a `None` value'

Created on 22 Feb 2019  ·  5Comments  ·  Source: getzola/zola

Bug Report

Environment

OS version: Linux 4.18.0-15-generic #16-Ubuntu SMP Thu Feb 7 10:56:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Zola version: 0.5.1

Expected Behavior

Shouldn't have crashed.

Current Behavior

Change detected @ 2019-02-22 11:22:11
-> Content changed /home/florianb/crafting/mks-web/content/_index.md
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', src/libcore/option.rs:355:21
note: Run with `RUST_BACKTRACE=1` for a backtrace.

Stacktrace:

Change detected @ 2019-02-22 12:08:49
-> Content changed /home/florianb/crafting/mks-web/content/_index.md
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', src/libcore/option.rs:355:21
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   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:211
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:227
   4: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:491
   5: std::panicking::continue_panic_fmt
             at src/libstd/panicking.rs:398
   6: rust_begin_unwind
             at src/libstd/panicking.rs:325
   7: core::panicking::panic_fmt
             at src/libcore/panicking.rs:95
   8: core::panicking::panic
             at src/libcore/panicking.rs:59
   9: library::library::Library::populate_sections
  10: rebuild::after_content_change
  11: zola::cmd::serve::serve
  12: zola::main
  13: std::rt::lang_start::{{closure}}
  14: std::panicking::try::do_call
             at src/libstd/rt.rs:59
             at src/libstd/panicking.rs:310
  15: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:102
  16: std::rt::lang_start_internal
             at src/libstd/panicking.rs:289
             at src/libstd/panic.rs:398
             at src/libstd/rt.rs:58
  17: main
  18: __libc_start_main
  19: _start

Step to reproduce

Started playing around with zola having the following file-tree:

../.
├── config.toml
├── content
│   ├── _cars
│   │   ├── _index.md
│   │   └── _mercedes.md
│   └── _index.md
├── public
│   └── _cars
│       ├── index.html
│       └── mercedes
│           └── index.html
├── sass
├── static
├── templates
│   └── index.html
└── themes

The error ocured after deleting content/_index.md. Before that delete i renamed content/cars/ to content/_cars.

Content of content/_index.md

+++
+++
bug done
Source
picture florianb

All 5 comments

It might have been fixed in the next branch, I'll try to reproduce that later

Keats picture Keats on 22 Feb 2019

Thank you very much! I'd try to help but i guess i'm too new to Rust to actually be a help.

I've seen this might be related to #559 - feel free to close my issue in favor of the former issue. :coffee: :cake:

florianb picture florianb on 22 Feb 2019

Your reproduction worked perfectly, thanks!

:+1:

Keats picture Keats on 22 Feb 2019
❤1

I think I've reproduced this bug with Zola 0.11.0, on the master and next branches in archlinux. I can also file this as a new issue if that's ideal but this seems like a related bug.

To reproduce:

I do the following:

  • zola init test-site
  • cd test-site
  • in a new terminal zola serve
  • mkdir -p content/posts
  • echo '+++'> content/posts/_index.md && echo '+++' >> content/posts/_index.md
  • rm content/posts/_index.md

The zola serve command crashes for me.

The stack trace from the pacman install doesn't have symbols so I compiled master and here's the stack trace:

~/projects/test-site$ RUST_BACKTRACE=1 ../zola/target/debug/zola serve                                                                  
Building site...                                                                                                                                       
-> Creating 0 pages (0 orphan), 1 sections, and processing 0 images                                                                                    
Done in 112ms.                                                                                                                                         

Listening for changes in /home/simlay/projects/test-site{config.toml, content, sass, static, templates}                                                
Press Ctrl+C to stop                                                                                                                                   

Web server is available at http://127.0.0.1:1111                                                                                                       

Change detected @ 2020-08-11 12:08:44                                                                                                                  
-> Content changed /home/simlay/projects/test-site/content/posts/_index.md                                                                             
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', components/library/src/library.rs:366:9                                       
stack backtrace:                                                                                                                                       
   0: backtrace::backtrace::libunwind::trace                                                                                                           
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86                                         
   1: backtrace::backtrace::trace_unsynchronized                                                                                                       
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66                                               
   2: std::sys_common::backtrace::_print_fmt                                                                                                           
             at src/libstd/sys_common/backtrace.rs:78                                                                                                  
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt                                                                
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1076
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1537
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218
  10: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:486
  11: rust_begin_unwind
             at src/libstd/panicking.rs:388
  12: core::panicking::panic_fmt
             at src/libcore/panicking.rs:101
  13: core::panicking::panic
             at src/libcore/panicking.rs:56
  14: core::option::Option<T>::unwrap
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/macros/mod.rs:10
  15: library::library::Library::get_section_by_key
             at components/library/src/library.rs:366
  16: library::library::Library::get_section_path_by_key
             at components/library/src/library.rs:374
  17: library::content::ser::SerializingSection::from_section
             at components/library/src/content/ser.rs:242
  18: library::content::section::Section::to_serialized
             at components/library/src/content/section.rs:251
  19: library::content::section::Section::render_html
             at components/library/src/content/section.rs:223
  20: site::Site::render_section
             at components/site/src/lib.rs:849
  21: site::Site::render_sections::{{closure}}
             at components/site/src/lib.rs:877
  22: core::ops::function::impls::<impl core::ops::function::FnMut<A> for &F>::call_mut
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/ops/function.rs:252
  23: core::iter::adapters::map_try_fold::{{closure}}
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/adapters/mod.rs:837
  24: core::iter::traits::iterator::Iterator::try_fold
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/traits/iterator.rs:1889
  25: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::try_fold
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/adapters/mod.rs:863
  26: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::try_fold
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/adapters/mod.rs:863
  27: <core::iter::adapters::TakeWhile<I,P> as core::iter::traits::iterator::Iterator>::try_fold
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/adapters/mod.rs:1875
  28: <core::iter::adapters::TakeWhile<I,P> as core::iter::traits::iterator::Iterator>::fold
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/adapters/mod.rs:1890
  29: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/adapters/mod.rs:870
  30: core::iter::traits::iterator::Iterator::for_each
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/iter/traits/iterator.rs:658
  31: <rayon::iter::noop::NoopConsumer as rayon::iter::plumbing::Folder<T>>::consume_iter
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/noop.rs:34
  32: <rayon::iter::while_some::WhileSomeFolder<C> as rayon::iter::plumbing::Folder<core::option::Option<T>>>::consume_iter
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/while_some.rs:139
  33: <rayon::iter::map::MapFolder<C,F> as rayon::iter::plumbing::Folder<T>>::consume_iter
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/map.rs:248
  34: <rayon::iter::map::MapFolder<C,F> as rayon::iter::plumbing::Folder<T>>::consume_iter
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/map.rs:248
  35: rayon::iter::plumbing::Producer::fold_with
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/plumbing/mod.rs:110
  36: rayon::iter::plumbing::bridge_producer_consumer::helper
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/plumbing/mod.rs:438
  37: rayon::iter::plumbing::bridge_producer_consumer
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/plumbing/mod.rs:397
  38: <rayon::iter::plumbing::bridge::Callback<C> as rayon::iter::plumbing::ProducerCallback<I>>::callback
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/plumbing/mod.rs:373
  39: <rayon::vec::IntoIter<T> as rayon::iter::IndexedParallelIterator>::with_producer
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/vec.rs:68
  40: rayon::iter::plumbing::bridge
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/plumbing/mod.rs:357
  41: <rayon::vec::IntoIter<T> as rayon::iter::ParallelIterator>::drive_unindexed
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/vec.rs:33
  42: <rayon::iter::map::Map<I,F> as rayon::iter::ParallelIterator>::drive_unindexed
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/map.rs:49
  43: <rayon::iter::map::Map<I,F> as rayon::iter::ParallelIterator>::drive_unindexed
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/map.rs:49
  44: <rayon::iter::while_some::WhileSome<I> as rayon::iter::ParallelIterator>::drive_unindexed
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/while_some.rs:44
  45: rayon::iter::from_par_iter::<impl rayon::iter::FromParallelIterator<()> for ()>::from_par_iter
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/from_par_iter.rs:226
  46: rayon::iter::ParallelIterator::collect
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/mod.rs:1887
  47: rayon::result::<impl rayon::iter::FromParallelIterator<core::result::Result<T,E>> for core::result::Result<C,E>>::from_par_iter
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/result.rs:121
  48: rayon::iter::ParallelIterator::collect
             at /home/simlay/.cargo/registry/src/github.com-1ecc6299db9ec823/rayon-1.3.1/src/iter/mod.rs:1887
  49: site::Site::render_sections
             at components/site/src/lib.rs:872
  50: site::Site::build
             at components/site/src/lib.rs:497
  51: rebuild::delete_element
             at components/rebuild/src/lib.rs:123
  52: rebuild::after_content_change
             at components/rebuild/src/lib.rs:365
  53: zola::cmd::serve::serve
             at src/cmd/serve.rs:519
  54: zola::main
             at src/main.rs:83
  55: std::rt::lang_start::{{closure}}
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libstd/rt.rs:67
  56: std::rt::lang_start_internal::{{closure}}
             at src/libstd/rt.rs:52
  57: std::panicking::try::do_call
             at src/libstd/panicking.rs:297
  58: std::panicking::try
             at src/libstd/panicking.rs:274
  59: std::panic::catch_unwind
             at src/libstd/panic.rs:394
  60: std::rt::lang_start_internal
             at src/libstd/rt.rs:51
  61: std::rt::lang_start
             at /home/simlay/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libstd/rt.rs:67
  62: main
  63: __libc_start_main
  64: _start
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
simlay picture simlay on 11 Aug 2020

That's one of the many serve bugs. There's a branch https://github.com/getzola/zola/pull/1114 to completely change the way it's done which should fix all those issues and more.

Keats picture Keats on 11 Aug 2020
👍1
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