global variables with -fanalyzer

[thradams]

The state of non const global variables used inside functions needs to be "reset" to "unknown" each time function starts. also static variables declared inside functions.

[iphydf]

In our code we don't use non-const globals, but there are several default initialised constant structs used to zero-init new objects. They will always have all their owning pointers null.

[thradams]

missing const