GDB detects non-existing segmentation fault

I have a rather innocent piece of code that, when run in the debugger, causes a segfault at a line like

std::vector<double> snappedDofs;

with the text editor jumping to a totally unrelated line in another file, even though the stack viewer does not move from the line above.

Toggling the option "Run in terminal" in Project -> Run settings miraculously fixes the issue and the code steps fine past the line above.