Emulator

Game Name?
I believe this is not game-related, I tested with :
Super Smash Bros Melee
Mario Kart Double Dash!

Game ID? (right click the game in the game list, Properties, Info tab)

GALE01
GM4E01

MD5 Hash? (right click the game in the game list, Properties, Verify tab, Verify Integrity button)

0e63d4223b01d9aba596259dc155a174
8f4b2434444a89ae345ecba99d2ac58d

What's the problem? Describe what went wrong.

Gecko codes are loaded incorrectly. Any code from disk or after saving is displayed as a series of such lines :

ffffffff  00000000

While on disk they look like this :

$test
040249a4 38600001
*040249a4 38600001

What steps will reproduce the problem?

Any code loaded from disk trigger the issue (distributed with Dolphin, downloaded or manually added). See screenshots.

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

Yes :
5.0-10729
b0113b6c64a7807e35cfd9dd597d3c5e77b4ceda

Is the issue present in the latest stable version?

Yes : 5.0-7309 (commit 10d230a512b99aee66f7343481ed13d83557de22)

If the issue isn't present in the latest stable version, which is the first broken version? (You can find the first broken version by bisecting. Windows users can use the tool https://forums.dolphin-emu.org/Thread-green-notice-development-thread-unofficial-dolphin-bisection-tool-for-finding-broken-builds and anyone who is building Dolphin on their own can use git bisect.)

At least since 5.0-9575, commit 46918f420d443c3a32bd27170e3fa0e4f7bc5255. I have some trouble building old versions, but I will try if necessary.

What are your PC specifications? (CPU, GPU, Operating System, more)

Archlinux up-to-date as of 2019-07-28.

Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)

See attached screenshots.
Thank you for this emulator !