Uncaught Error: EPERM Operation not permitted when trying to directly open attachments (as opposed to download, then open)

[ganthern]

Seems to happen at least since 3.103.3 on windows only:

Client: win32
Type: PREMIUM
Tutanota version: 3.106.4
Timestamp (UTC): Fri, 06 Jan 2023 12:06:33 GMT
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) tutanota-desktop/3.106.4 Chrome/108.0.5359.62 Electron/22.0.0 Safari/537.36
Error
Error message: EPERM: operation not permitted, open 'C:\Users\noo\AppData\Local\Temp\tutanota\nkX3ZzdgucS7lQyX8LnRtQ\download\QUOTE - CM_FR_20230111_71956 .pdf'
Stacktrace:
Error: EPERM: operation not permitted, open 'C:\Users\noo\AppData\Local\Temp\tutanota\nkX3ZzdgucS7lQyX8LnRtQ\download\QUOTE - CM_FR_20230111_71956 .pdf'

Client: win32
Type: PREMIUM
Tutanota version: 3.103.3
Timestamp (UTC): Mon, 07 Nov 2022 14:32:35 GMT
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) tutanota-desktop/3.103.3 Chrome/102.0.5005.167 Electron/19.1.3 Safari/537.36
Error
Error message: EPERM: operation not permitted, open 'C:\Users\noo\AppData\Local\Temp\tutanota\HOxRpF7Wor9FNvnmzpT7qw\download\Emran Aloul.pdf'
Stacktrace:
Error: EPERM: operation not permitted, open 'C:\Users\noo\AppData\Local\Temp\tutanota\HOxRpF7Wor9FNvnmzpT7qw\download\Emran Aloul.pdf'

Client: win32
Type: PREMIUM
Tutanota version: 3.104.5
Timestamp (UTC): Fri, 02 Dec 2022 14:30:53 GMT
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) tutanota-desktop/3.104.5 Chrome/102.0.5005.167 Electron/19.1.5 Safari/537.36
Error
Error message: EPERM: operation not permitted, open 'C:\Users\user\AppData\Local\Temp\tutanota\WBPSqyrxJoUWG_MOa1iX5Q\download\【最新版_久保編集】★fin_資料3_諸外国指標・政策概要比較一覧(1117時点） - コピー.xlsx'
Stacktrace:
Error: EPERM: operation not permitted, open 'C:\Users\user\AppData\Local\Temp\tutanota\WBPSqyrxJoUWG_MOa1iX5Q\download\【最新版_久保編集】★fin_資料3_諸外国指標・政策概要比較一覧(1117時点） - コピー.xlsx'

Attachments will not open after multiple tries and refresh.

I receive a message "an error has occurred" every time I open my Tutanota account.

Every time I log on it says "error". I am also unable to download attachments.

For the last week or so I have been unable to open attachments from known sources that previously were opening without a problem. When I try to download, they do not appear in my download file. The error code says they can't be accessed because they're already open in another file or something similar. Help, I need these files!

Observation:

• Looking at all the file names, there doesn't seem to be a pattern like spaces or other special characters that cause this. It's also not constrained to one file type.
• the fact that some users report an error after each app start is odd; is there another file like a log that we're accessing on startup that may have the same problem? -> this may be happening during tmp cleanup

Further Info:

One user got back to us, they're experiencing this since about ~26th of december. They're receiving this message when using the "open" option on attachments:

"There was an error opening this document. This file is already open or in use by another application."

Test Notes

see reproduction in comment. try it on win, linux, mac. If #2113 happens, that's not a dev-bug

[ganthern]

Electron seems to keep the file open after downloading it for some reason. One way to repro:

1. click "Open" on a pdf for example
2. it's downloaded, but adode reader will show an error that the file is still in use
3. searching for the file name in resmon.exe under the CPU tabs associated handles will show tutanota as having the file open
4. open a new window in tutanota and repeat step 1
5. see the EPERM error because we're now trying to overwrite a file we already have a handle to