testCascade and cascade_example segfault in release-type build

If I compile a release build with g++ 8.2.1, I get segfaults when executing testCascade and cascade_example. No issues with clang though. gdb says it happens in TrackingLine::GetTrack.

Furthermore, testSibyll seems to get stuck in some kind of endless loop (clang & g++). The output doesn't get beyond

Decay: calling Sibyll decay routine..

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