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Referencing a footnote panics with HTML export #7100

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#7158
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Referencing a footnote panics with HTML export#7100
#7158
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bugSomething isn't workingcrashThe Typst compiler crashes for some inputhtmlRelated to HTML exporturgentShould be fixed before the next release.
@cady-b

Description

@cady-b
cady-b
opened on Oct 10, 2025

Description

Minimal reproducible example (the footnote's body doesn't seem to matter):

#footnote[]<a>
@a

given to typst compile --features html -f html mre.typ outputs:

thread 'main' panicked at crates/typst-library/src/model/footnote.rs:314:45:
called `Option::unwrap()` on a `None` value

typst/crates/typst-library/src/model/footnote.rs

Line 314 in ddd8ae7

let body = self.note.body_content().unwrap().clone();

backtrace 
thread 'main' panicked at crates/typst-library/src/model/footnote.rs:314:45:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/ace633090349fc5075b5b0d56294de985e7d1191/library/std/src/panicking.rs:697:5
   1: core::panicking::panic_fmt
             at /rustc/ace633090349fc5075b5b0d56294de985e7d1191/library/core/src/panicking.rs:75:14
   2: core::panicking::panic
             at /rustc/ace633090349fc5075b5b0d56294de985e7d1191/library/core/src/panicking.rs:145:5
   3: core::option::unwrap_failed
             at /rustc/ace633090349fc5075b5b0d56294de985e7d1191/library/core/src/option.rs:2130:5
   4: core::option::Option<T>::unwrap
             at /home/cady/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:1009:21
   5: typst_library::model::footnote::<impl typst_library::foundations::content::packed::Packed<typst_library::model::footnote::FootnoteEntry>>::realize
             at /home/cady/pali/git/typst/crates/typst-library/src/model/footnote.rs:314:45
   6: typst_html::rules::FOOTNOTE_ENTRY_RULE::{{closure}}
             at /home/cady/pali/git/typst/crates/typst-html/src/rules.rs:383:31
   7: core::ops::function::FnOnce::call_once
             at /home/cady/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:253:5
   8: typst_library::foundations::styles::rule::NativeShowRule::apply
             at /home/cady/pali/git/typst/crates/typst-library/src/foundations/styles.rs:1107:22
   9: typst_realize::visit_show_rules
             at /home/cady/pali/git/typst/crates/typst-realize/src/lib.rs:380:22
  10: typst_realize::visit
             at /home/cady/pali/git/typst/crates/typst-realize/src/lib.rs:249:8
  11: typst_realize::realize
             at /home/cady/pali/git/typst/crates/typst-realize/src/lib.rs:68:5
  12: typst_html::fragment::realize_fragment
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:119:5
  13: typst_html::fragment::html_inline_fragment
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:98:20
  14: typst_html::convert::handle_html_elem
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:196:24
  15: typst_html::convert::handle
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:96:9
  16: typst_html::convert::convert_to_nodes
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:76:9
  17: typst_html::fragment::html_block_fragment_impl::{{closure}}
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:68:5
  18: comemo::memoize::memoize
             at /home/cady/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/comemo-0.5.0/src/memoize.rs:71:18
  19: typst_html::fragment::html_block_fragment_impl
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:39:1
  20: typst_html::fragment::html_block_fragment
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:24:5
  21: typst_html::convert::handle_html_elem
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:182:24
  22: typst_html::convert::handle
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:96:9
  23: typst_html::convert::convert_to_nodes
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:76:9
  24: typst_html::fragment::html_block_fragment_impl::{{closure}}
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:68:5
  25: comemo::memoize::memoize
             at /home/cady/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/comemo-0.5.0/src/memoize.rs:71:18
  26: typst_html::fragment::html_block_fragment_impl
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:39:1
  27: typst_html::fragment::html_block_fragment
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:24:5
  28: typst_html::convert::handle_html_elem
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:182:24
  29: typst_html::convert::handle
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:96:9
  30: typst_html::convert::convert_to_nodes
             at /home/cady/pali/git/typst/crates/typst-html/src/convert.rs:76:9
  31: typst_html::fragment::html_block_fragment_impl::{{closure}}
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:68:5
  32: comemo::memoize::memoize
             at /home/cady/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/comemo-0.5.0/src/memoize.rs:71:18
  33: typst_html::fragment::html_block_fragment_impl
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:39:1
  34: typst_html::fragment::html_block_fragment
             at /home/cady/pali/git/typst/crates/typst-html/src/fragment.rs:24:5
  35: typst_html::document::html_document_impl::{{closure}}
             at /home/cady/pali/git/typst/crates/typst-html/src/document.rs:99:21
  36: comemo::memoize::memoize
             at /home/cady/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/comemo-0.5.0/src/memoize.rs:71:18
  37: typst_html::document::html_document_impl
             at /home/cady/pali/git/typst/crates/typst-html/src/document.rs:46:1
  38: typst_html::document::html_document
             at /home/cady/pali/git/typst/crates/typst-html/src/document.rs:33:5
  39: <typst_html::dom::HtmlDocument as typst::sealed::Sealed>::create
             at /home/cady/pali/git/typst/crates/typst/src/lib.rs:321:13
  40: typst::compile_impl
             at /home/cady/pali/git/typst/crates/typst/src/lib.rs:149:20
  41: typst::compile
             at /home/cady/pali/git/typst/crates/typst/src/lib.rs:71:18
  42: typst::compile::compile_and_export
             at /home/cady/pali/git/typst/crates/typst-cli/src/compile.rs:304:47
  43: typst::compile::compile_once
             at /home/cady/pali/git/typst/crates/typst-cli/src/compile.rs:248:43
  44: typst::compile::compile::{{closure}}
             at /home/cady/pali/git/typst/crates/typst-cli/src/compile.rs:43:38
  45: typst::timings::Timer::record
             at /home/cady/pali/git/typst/crates/typst-cli/src/timings.rs:48:23
  46: typst::compile::compile
             at /home/cady/pali/git/typst/crates/typst-cli/src/compile.rs:43:11
  47: typst::dispatch
             at /home/cady/pali/git/typst/crates/typst-cli/src/main.rs:76:38
  48: typst::main
             at /home/cady/pali/git/typst/crates/typst-cli/src/main.rs:58:15
  49: core::ops::function::FnOnce::call_once
             at /home/cady/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:253:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

I wasn't able to reproduce this when exporting to PDF; as such, it appears to be within the currently 'experimental' parts of Typst.

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    bugSomething isn't workingcrashThe Typst compiler crashes for some inputhtmlRelated to HTML exporturgentShould be fixed before the next release.

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