You'll notice
Useful3 Signal1
Notebook edits check size and file type first instead of loading a huge file into memory.
What's wrong with this entry?
Anonymous. No account, no email.
What
Editing a notebook now stats the file first and bails out if it is not a regular file or is larger than 100 MB, rather than pulling the whole thing into memory. Within the cap it reads at most one byte past the limit.
Evidence
notebook_path
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.
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v2.1.235
Notebook diffs say when a file is too big to preview
Both mention notebook