Floating point exception when loading a .mscx score

You're all but ine and crashes (on loading a single score) are critical.

That score stems from MuseScore 2.0.3, it crashes in 2.3.2 too, even in 2.0.3 or any 2.x

libmscore/sig.cpp, void TimeSigMap::normalize():

      for (auto i = begin(); i != end(); ++i) {
            SigEvent& e  = i->second;
            bar += TimeSigFrac(i->first - tick, tm).reduced();
            e.setBar(bar.numerator() / bar.denominator());    // <- here's the crash, denominator() being 0
            tick = i->first;
            tm   = ticks_measure(e.timesig());
            }

The score's source does look rather unusual, none of the 4 instruments (Soprano, Alto, Hommes and another unnamed instrument, in F clef) do have any instruments definitions (range, sound, articulationes, etc.). There's no time signature at all (probably should be 1/2, as that is what most measures are set to).

Maybe this score is similar enough?

https://musescore.com/user/27094/scores/44388

Same title, and composer. It is way older though, stemms from MuseScorew 1.2
and is lacking the lyrics.

Lyrics seen at https://www.youtube.com/watch?v=He2x4JEu8o4

Where did you get that score from, how did you get it into this state?

Again: You're all but ine and crashes (on loading a single score) are critical.
That score never worked, it crashes in all 2.x and 3.x versions and doesn't open in 1.x