Steps to reproduce:
1. Download and open the attached project
2. Build for WebGL
3. Open the WebGL build
4. Open browser developer tools
--Chrome: "Customize and Control Chrome"-->More tools--Developer tools
--Firefox: "Open Menu"-->Developer-->Toggle tools
5. Look at the console

Expected result: "Test 3 - direct property (xfrm.localPosition) set method extraction successful"
Actual result: "Test 3 - direct property (xfrm.localPosition) set method extraction failed."

Reproduced on 5.2.3f1. 5.3.6p8, 5.4.2p3, 5.5.0f1

Notes:
-This does not happen in the Editor or in a Standalone build
-Enabling other test scripts (located on the camera) also yields some extractions fails