UBSAN note

[jeroen]

cmark/chunk.h:69:3: runtime error: null pointer passed as argument 2, which is declared to never be null

[jgm]

I added make ubsan to try this myself. But I didn't see
any errors. Can you let me know what input you used to
get this?

+++ Jeroen Ooms [May 29 15 02:58 ]:

cmark/chunk.h:69:3: runtime error: null pointer passed as argument 2, which is d
eclared to never be null

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References

1. UBSAN note #43

[jeroen]

I think it appears when converting to commonmark. See here for the full log. Basically I took this file and converted it to html, xml, man and commonmark.

[jgm]

Strange. On linux I get no ubsan warnings for that file,
converting it to html, xml, man, and commonmark.

+++ Jeroen Ooms [May 29 15 11:02 ]:

See [1]here for the full log. Basically I took [2]this file and
converted it to html, xml, man and commonmark.

[jeroen]

They are using very recent versions of gcc/clang, might be something new. I think you can fix it by making sure you are not calling memcpy with zero bytes and a null pointer in the source.