Blue screen (crash) when sending large attachment

[secjoe88]

• [ X] I have searched open and closed issues for duplicates

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Bug Description

When attempting to send a message with a very large (in this case ~2GB) attachment, Signal displays a blue screen and becomes unresponsive. It requires a force quit from the CMD-OPT-Esc menu to kill the process.

Note:
I recognize that sending files of this size is not supported. However, if your intention is (as I presume it would be) that some sort of useful message be provided to the end-user, it appears that this is not the case.

Steps to Reproduce

1. Launch Signal Desktop
2. Select a conversation from the list on the left (behavior has been replicated with both group and single-recipient conversations)
3. When the chat-style window for the conversation appears, click the paper clip to the right of the message-entry bar to add an attachment
4. In the file dialog that appears, select a large file (I used a 2.16 GB 4k mpeg video clip, in case that matters). Click Open.
5. The message-entry bar should now display a thumbnail above it, indicating that a file is attached to the message. Press the Enter key to attempt to send the message

Actual Result:
Signal displays a blue screen and becomes unresponsive, requiring a force-quit to regain usability

Expected Result:
E.g. a popup that says "can't do that"?

Screenshots

Behavior as-reported

Behavior with developer tools open

Platform Info

Signal Version:
1.25.3

Operating System:
macOS Mojave 10.14

Linked Device Version:
This doesn't seem to appear on my android device!

Link to Debug Log

signal_err.txt

[kenpowers-signal]

@secjoe88 Signal only supports attachments of 100MB in size. The next release of Signal Desktop will properly reject attachments which are larger than this limit.