Android app crash every time trying to view image in markdown table

[svenssonaxel]

Summary

Android app crashes every time trying to view a markdown table that contains an inline image. Perhaps related to #2568?

Environment Information

See screenshot

Steps to reproduce

Send a message containing a markdown table that contains an inline image. View that channel in the Android Mobile App.

Expected behavior

Table and image is shown

Observed behavior (that appears unintentional)

See screenshot

[svenssonaxel]

[amyblais]

@svenssonaxel Are you open to downloading the Beta app (instructions here https://mattermost.com/blog/mobile-beta-program-v2/) to see if the issue reproduces on our latest build (build number 460)?

[svenssonaxel]

Reproduced.

[enahum]

Just as a sanity check, does the inline image shows up in a regular message?

[svenssonaxel]

@enahum Turns out, that was a good sanity check!

Test message contents

Test 1:

![](/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)

Test 2:

![](https://domain.name.redacted/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)

Test 3:

![](https://domain.name.redacted/api/v4/files/w35t17xzu3875mpn54taqrsmuo)

Test 4:

|A|B|C|
|-|-|-|
|a|![](/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)|c|

Test 5:

|A|B|C|
|-|-|-|
|a|![](https://domain.name.redacted/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)|c|

Test 6:

|A|B|C|
|-|-|-|
|a|![](https://domain.name.redacted/api/v4/files/w35t17xzu3875mpn54taqrsmuo)|c|

Test 7:

![](/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)

Test 8:

![](https://domain.name.redacted/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)

Test 9:

![](https://domain.name.redacted/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character.png)

Test 10:

|A|B|C|
|-|-|-|
|a|![](/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)|c|

Test 11:

|A|B|C|
|-|-|-|
|a|![](https://domain.name.redacted/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)|c|

Test 12:

|A|B|C|
|-|-|-|
|a|![](https://domain.name.redacted/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character.png)|c|

Test 13:

|A|
|-|
|![](/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)|
|![](/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)|

Test 14:

|A|
|-|
|![](https://domain.name.redacted/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)|
|![](https://domain.name.redacted/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)|

Test 15:

|A|
|-|
|![](/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)|

Test 16:

|A|
|-|
|![](https://domain.name.redacted/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail)|

Test 17:

|A|
|-|
|![](/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)|

Test 18:

|A|
|-|
|![](https://domain.name.redacted/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg)|

Results

In tests 1-3:

• The web app on desktop shows a message with both text and picture.
• The Android beta app shows a message with text but no picture.

In tests 4-6:

• The web app on desktop shows a table with a picture in one of the cells.
• The Android beta app shows a table with the corresponding cell empty rather than a picture.

In tests 7-9:

• The web app on desktop shows a message with both text and picture.
• The Android beta app shows a message with both text and picture.

In test 10:

• The web app on desktop shows a table with a picture in one of the cells.
• The Android beta app shows a table with the corresponding cell containing a broken-image symbol.

In tests 11-12:

• The web app on desktop shows a table with a picture in one of the cells.
• The Android beta app shows a table with a picture in one of the cells.

In tests 13-14:

• The web app on desktop shows a table with two pictures in the same column.
• The Android beta app crashes upon opening the channel.

In tests 15-16:

• The web app on desktop shows a table with a picture in one of the cells.
• The Android beta app shows a table with the corresponding cell empty rather than a picture.

In test 17:

• The web app on desktop shows a table with a picture in one of the cells.
• The Android beta app shows a table with the corresponding cell containing a broken-image symbol.

In test 18:

• The web app on desktop shows a table with a picture in one of the cells.
• The Android beta app shows a table with a picture in one of the cells.

Summary

• The crash is only reproduced in tests 13 and 14. Notably, I could not reproduce the crash with just one image.
• The Android app works as expected in tests 7, 8, 9, 11, 12 and 18.

Test images

For reference, the test images are as follows:

URI	Path as used in the examples	SHA256 sum
https://user-images.githubusercontent.com/163858/223685408-f5621269-8d79-4391-b784-3ecf5ab25b43.jpg	/api/v4/files/w35t17xzu3875mpn54taqrsmuo/thumbnail	6d336b79eb88a2235d9cbfefdf67af3c1991fd5f1e4c2f6f26375b1227241c03
https://user-images.githubusercontent.com/163858/223685410-3bce0d9e-aadb-43cd-91f8-02753630f2a6.jpg	/api/v4/files/w35t17xzu3875mpn54taqrsmuo	7abdb589b2ac1fb7cc9f857bf946bf6c80f588d7aa132dab8ba079fb09ed3f4c
https://user-images.githubusercontent.com/163858/223685401-95ef49a6-bb90-46c7-9d16-071083495e95.jpeg	/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character-thumbnail.jpeg	0001d4d21b83b288dd55c0d26d70e590c3f193a89cc883777148555e264b9656
https://user-images.githubusercontent.com/163858/223685415-c52315fd-c1b8-4429-a40c-7caae21f1322.png	/plugins/com.axelsvensson.mattermost-plugin-character-profiles/character.png	177c8a94bc3c09ed82da70096c98e7940f0eb7ab2c1c2dd74a1db8e93e239d50

Potentially separate bugs

• In the test cases above, I've created/edited the message on desktop while the Android app showed the channel list, and only thereafter opened the channel on Android. Some of the behaviors above turn out differently if the channel on Android remains open while the messages are edited.
• When the Android app crashes, there's a button to RELAUNCH. Clicking this button produces a permanently white screen, and the app has to be killed and restarted manually.

[svenssonaxel]

@amyblais @enahum Any update?

[amyblais]

Opened https://mattermost.atlassian.net/browse/MM-51731.