two-for-loops-with-barrier-function reading uninitialized variable?

[cdotstout]

It seems like this graphicsfuzz test is reading an uninitialized variable here:

https://github.com/KhronosGroup/VK-GL-CTS/blob/main/external/vulkancts/data/vulkan/amber/graphicsfuzz/two-for-loops-with-barrier-function.amber#L74

The test can hang depending on the value that's read. Is the test expecting the variable to be zero initialized?