object patch add-link overwrites root node data when child is too small #7190
Description
Version information:
go-ipfs version: 0.4.23-
Repo version: 7
System version: amd64/linux
Golang version: go1.13.7
Description:
Hello,
I was trying to add links to other versions of an image to the original's dag node. Though the links are working, accessing the root node yields a child version of the original image instead of the original.
To reproduce, we use two versions of the same image :
- original :
QmcFDihqvEwzgahFora3TU1BRZ84UJRSd2PW43j4buSs6n - smaller version :
Qmapcp7ey9eUyk98eEK8iDbu7VdUHVtdd1RVsP5Wvqf4Cp
Then, we run
ipfs object patch add-link QmcFDihqvEwzgahFora3TU1BRZ84UJRSd2PW43j4buSs6n "small.jpg" Qmapcp7ey9eUyk98eEK8iDbu7VdUHVtdd1RVsP5Wvqf4Cp
On my machine, this yields QmQbr75jzhPXWFi59uRUrig6U2paGwfKSe8MLuDwC5s8VL.
We can then observe that the above cid doesn't display the original, but the small.jpg link works and yields the same image. In testing, I have noticed that when the small image is larger (my guess is larger than chunk size), this behavior disappears.
In case the images aren't available :
