regression intersection is invalid in boost > 1.78

[jmachowinski]

Two touching polygons reproduce a invalid intersection in newer boost versions.

Input:

Output of intersection:

Reproducer
https://godbolt.org/z/avPajMPfh

[barendgehrels]

I can reproduce it.

WKT's:

static std::string issue_1363[2] =
{
    "MULTIPOLYGON(((2.0611606968426476882 0.61095000000000010409,2.046160696842648008 0.62595000000000000639,2.0311606968426478836 0.6409499999999999087,1.9486606968426476438 0.73094999999999987761,1.9261606968426476794 0.76094999999999990425,1.9336606968426472974 0.78344999999999986873,2.0161606968426477593 0.85844999999999993534,2.0236606968426480435 0.8584499999999997133,2.0461606968426475639 0.90344999999999986429,2.0911606968426479369 0.88844999999999973994,2.098660696842647333 0.8734499999999996156,2.1136606968426479014 0.86594999999999977547,2.1286606968426480258 0.85094999999999976215,2.1436606968426472619 0.83594999999999985985,2.143660696842647706 0.62594999999999989537,2.0836606968426476527 0.62594999999999989537,2.0611606968426476882 0.61095000000000010409)))",
    "MULTIPOLYGON(((2.0461606968426484521 0.90344999999999986429,2.001160696842647635 0.91095000000000003748,1.8511606968426477238 0.91094999999999992646,1.813660696842647635 0.91844999999999998863,1.813660696842647635 0.9409499999999999531,1.8211606968426479192 1.1059499999999999886,1.8286606968426479813 1.263449999999999962,1.9636606968426479902 1.263449999999999962,2.0461606968426484521 1.2559499999999998998,2.0536606968426478481 1.2409499999999999975,2.1286606968426480258 1.2409499999999999975,2.1286606968426480258 1.1059499999999999886,2.1211606968426477415 0.92594999999999982876,2.1136606968426479014 0.89594999999999980211,2.091160696842648381 0.88844999999999996199,2.0461606968426484521 0.90344999999999986429)))"
};