This happens in worg at:
https://git.sr.ht/~bzg/worg/tree/ba6cda890f200d428a5d68e819eef15b5306055f/exporters/ox-docstrings.org#L2490
The documentation for lesser blocks[1] states:
> Lines beginning with an asterisk or `#+` must be quoted by a comma (`,*`,
> `,#+`).
However, the following test document parses as a lesser block despite
containing a line starting with an unescaped #+:
```
#+CATEGORY: foo
#+begin_src text
#+CATEGORY: bar
#+end_src
```
which parses as:
```
(org-data
(:standard-properties
[1 1 1 60 60 0 nil org-data nil nil nil 3 60 nil #<buffer *scratch*> nil nil
nil]
:path nil :CATEGORY "foo")
(section
(:standard-properties
[1 1 1 60 60 0 nil first-section nil nil nil 1 60 nil #<buffer *scratch*>
nil nil #0])
(keyword
(:standard-properties
[1 1 nil nil 17 0 nil top-comment nil nil nil nil nil nil #<buffer
*scratch*> nil nil #1]
:key "CATEGORY" :value "foo"))
(src-block
(:standard-properties
[17 17 nil nil 60 0 nil nil nil nil nil nil nil nil #<buffer *scratch*> nil
nil #1]
:language "text" :switches nil :parameters nil :number-lines nil
:preserve-indent nil :retain-labels t :use-labels t :label-fmt nil :value
"#+CATEGORY: bar\n"))))
```
whereas I would expect this to be
```
(section
(keyword :key "CATEGORY" :value "foo")
(paragraph "#+begin_src text")
(keyword :key "CATEGORY" :value "bar")
(paragraph "#+end_src")
)
```
This test document shows that lines with an unescaped "*" do break up the
lesser block:
```
* foo
#+begin_src text
* bar
#+end_src
```
[1] https://orgmode.org/worg/org-syntax.html#Blocks
--
Tom Alexander
pgp: https://fizz.buzz/pgp.asc
