Should I expect syntax errors in YAML blocks to be detected and reported?

This has a syntax error in the YAML block:

% cat bad.md
---
history:
- number: Release 1.2
  changes: |
  - TBD
---

This fixes it:

% diff bad.md good.md
5c5
<   - TBD
---
>     - TBD

The latest pandoc:

% ~/Downloads/pandoc-2.14.0.1/bin/pandoc -v
pandoc 2.14.0.1
...

Pandoc thinks the bad YAML is a table:

% ~/Downloads/pandoc-2.14.0.1/bin/pandoc bad.md
<table>
<tbody>
<tr class="odd">
<td>history:</td>
</tr>
<tr class="even">
<td>- number: Release 1.2</td>
</tr>
<tr class="odd">
<td>changes: |</td>
</tr>
<tr class="even">
<td>- TBD</td>
</tr>
</tbody>
</table>

But it's OK with the good YAML:

% ~/Downloads/pandoc-2.14.0.1/bin/pandoc good.md

Parsing the file as YAML reports the error:

% ~/Downloads/pandoc-2.14.0.1/bin/pandoc --metadata-file bad.md
Error at "bad.md" (line 5, column 0):
Unexpected ' '

% ~/Downloads/pandoc-2.14.0.1/bin/pandoc --metadata-file good.md
^C

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