After sending mail, broken symlinks found in maildir leads to notmuch error

[vbmithr]

[vb@sita ~/mail/fastmail/cur]% ls -la ./M2ad4cf6ca935b78e20aa4b3a.G2ad4cf6ca935b78e20aa4b3a36e1f0c3f9670475:2*
lrwxrwxrwx 1 vb users 117  6 août  23:37 ./M2ad4cf6ca935b78e20aa4b3a.G2ad4cf6ca935b78e20aa4b3a36e1f0c3f9670475:2, -> '/home/vb/.cache/mujmap/!home!vb!mail!fastmail!cur!M2ad4cf6ca935b78e20aa4b3a.G2ad4cf6ca935b78e20aa4b3a36e1f0c3f9670475'
-rw-r--r-- 1 vb users 231  6 août  23:37 ./M2ad4cf6ca935b78e20aa4b3a.G2ad4cf6ca935b78e20aa4b3a36e1f0c3f9670475:2,S
[vb@sita ~/mail/fastmail/cur]% ls -al ~/.cache/mujmap
total 44
drwxr-xr-x  2 vb users 33542144  6 août  23:37 .
drwxr-xr-x 49 vb users     3452  1 août  19:39 ..

A link pointing into ~/.cache/mujmap exists while ~/.cache/mujmap is empty

[wesnel]

i also experience something similar to this, although my broken symlinks point to ~/Library/Caches since i am on a mac.

> notmuch new
Retrieving metadata... (42 possibly changed)
Downloading new mail...
Applying changes to notmuch database... (41 new, 42 changed, 0 destroyed)
Applying changes to JMAP server... (0 changed)
Error reading file /Users/wgn/Maildir/fastmail/cur/Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815:2,: No such file or directory
No new mail.
Note: A fatal error was encountered: Something went wrong trying to read or write a file

> ls -la ~/Maildir/fastmail/cur/Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815:2,*
lrwxr-xr-x 159 wgn  9 Aug 10:26 /Users/wgn/Maildir/fastmail/cur/Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815:2, -> /Users/wgn/Library/Caches/sh.eliza.mujmap/!Users!wgn!Maildir!fastmail!cur!Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815
.rw-r--r-- 46k wgn  9 Aug 10:26 /Users/wgn/Maildir/fastmail/cur/Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815:2,S

> ls -la ~/Library/Caches/sh.eliza.mujmap/!Users!wgn!Maildir!fastmail!cur!Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815
"/Users/wgn/Library/Caches/sh.eliza.mujmap/!Users!wgn!Maildir!fastmail!cur!Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815": No such file or directory (os error 2)

i am seemingly able to temporarily fix the issue by manually rm-ing any broken symlinks.

> rm -f ~/Maildir/fastmail/cur/Mf1dbc1c89c2c50253a89828a.Gf1dbc1c89c2c50253a89828a84ab66d3908b6815:2,

> notmuch new
Retrieving metadata... (0 possibly changed)
Applying changes to notmuch database... (0 new, 0 changed, 0 destroyed)
Applying changes to JMAP server... (0 changed)
Processed 1 file in almost no time.
No new mail. Detected 1 file rename.

[nickwynja]

I've seen this too and also remove the symlinks to resolve. I never realized it was connected with sending mail but was able to reproduce by sending a new email, syncing, and then running notmuch new.

In "Settings > My email addresses" on Fastmail then selecting my address and going "Show advanced preferences" I have the following selected so that sent mail is being saved on the server-side and not through mutt:

[vbmithr]

@nickwynja I have the same setting (probably the default). Might be worth trying to remove it to see the result.
Edit: I did not have the setting on, and still encounters the error so it's not related.

[ntrocado]

FWIW, I got a handful of broken symlinks on initial sync. After removing them everything works, with the "save sent messages" on fastmail set to off. If I turn it on the problem returns. So at least on my system it indeed seems to be related...