Crash on unclosed title quote in image links

[hiltjo]

The following one-liner crashes smu:

echo '![a](b ")' | smu

The issue is introduced in the commit:

68edb1b#diff-fc97d482e4d5c1bf47ff0b7daa1e07b0af189f6cb83a554ca4ce6a3fdaf3d6d2

This is because the title pointer points after titleend.

[karlb]

Thanks for spotting this problem, @hiltjo!

This should be solved by karlb#4. Do you agree, or would you expect different output in this case?

[karlb]

Your fix in https://git.codemadness.org/smu/commit/84c908fb6f3609c25ea60c57c7009490c3c77044.html breaks the following commonmark:

Foo [bar](/url/ "Title with "quotes" inside").

I can understand if you see this as a pathological case and don't want to support it, but I still want to let you know to make sure that you don't break it unintentionally.