Regression causing Documenter to crash when compiling ApproxFun manual

[thisrod]

Documenter version v0.22.5 worked. Version 0.23.0 crashed.

The manual didn't change between those commits.

[thisrod]

Here's a minimal example:

$ cd /tmp/A
$ ls -R
src

./src:
index.md
$ cat src/index.md 
$$
f
$$
$ julia -e 'using Documenter; makedocs()'
[ Info: SetupBuildDirectory: setting up build directory.
┌ Error: Markdown2.convert failed to convert src/index.md
└ @ Documenter.Documents ~/.julia/packages/Documenter/oEuOX/src/Documents.jl:62
ERROR: MethodError: no method matching _convert_block(::Symbol)
Closest candidates are:
  _convert_block(!Matched::Markdown.Admonition) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Utilities/Markdown2.jl:241
  _convert_block(!Matched::Markdown.Table) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Utilities/Markdown2.jl:234
  _convert_block(!Matched::Markdown.Footnote) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Utilities/Markdown2.jl:232
  ...
Stacktrace:
 [1] iterate at ./generator.jl:47 [inlined]
 [2] _collect(::Array{Any,1}, ::Base.Generator{Array{Any,1},typeof(Documenter.Utilities.Markdown2._convert_block)}, ::Base.EltypeUnknown, ::Base.HasShape{1}) at ./array.jl:619
 [3] map at ./array.jl:548 [inlined]
 [4] convert(::Type{Documenter.Utilities.Markdown2.MD}, ::Markdown.MD) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Utilities/Markdown2.jl:214
 [5] Documenter.Documents.Page(::String, ::String, ::String) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Documents.jl:60
 [6] addpage! at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Documents.jl:368 [inlined]
 [7] runner(::Type{Documenter.Builder.SetupBuildDirectory}, ::Documenter.Documents.Document) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Builder.jl:131
 [8] dispatch(::Type{Documenter.Builder.DocumentPipeline}, ::Documenter.Documents.Document) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Utilities/Selectors.jl:167
 [9] (::getfield(Documenter, Symbol("##3#8")))() at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Documenter.jl:319
 [10] cd(::getfield(Documenter, Symbol("##3#8")), ::String) at ./file.jl:96
 [11] #makedocs#1(::Bool, ::Documenter.Writers.HTMLWriter.HTML, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::typeof(makedocs)) at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Documenter.jl:318
 [12] makedocs() at /Users/rpolkinghorne/.julia/packages/Documenter/oEuOX/src/Documenter.jl:243
 [13] top-level scope at none:0
$ 

[thisrod]

Interestingly, $$f$$ works, but adding the line breaks causes a crash.

[thisrod]

Thanks! The ApproxFun manual is compiling again.