topology/totopogeom.sql failing (GEOS 3.9)

[pramsey]

--- ./topology/test/regress/totopogeom_expected 2020-11-26 16:01:06.000000000 -0800
+++ /tmp/pgis_reg/test_189_out  2020-12-03 10:05:10.000000000 -0800
@@ -24,7 +24,7 @@
 MULTIPOINT(0 -10,5 -10)|t
 MULTILINESTRING((-1 10,-10 10),(-10 8,-2 9))|t
 MULTIPOLYGON(((100 20,110 20,105 30,100 20),(102 22,108 22,105 28,102 22)),((80 20,90 20,90 60,80 20)))|t
-GEOMETRYCOLLECTION(POINT(-100 -100),LINESTRING(-100 -90,-90 -90),POLYGON((-100 -80,-90 -80,-95 -70,-100 -80),(-98 -78,-92 -78,-95 -72,-98 -78)),MULTIPOINT(-100 -110,-95 -110),LINESTRING EMPTY,MULTILINESTRING((-101 -90,-110 -90),(-110 -92,-102 -91)),MULTIPOLYGON(((0 -80,10 -80,5 -70,0 -80),(2 -78,8 -78,5 -72,2 -78)),((-20 -80,-10 -80,-10 -40,-20 -80))))|GEOMETRYCOLLECTION(MULTIPOLYGON(((-100 -80,-95 -70,-90 -80,-100 -80),(-98 -78,-92 -78,-95 -72,-98 -78)),((0 -80,5 -70,10 -80,0 -80),(2 -78,8 -78,5 -72,2 -78)),((-20 -80,-10 -40,-10 -80,-20 -80))),MULTILINESTRING((-110 -92,-102 -91),(-101 -90,-110 -90),(-100 -90,-90 -90)),MULTIPOINT(-100 -110,-100 -100,-95 -110))
+GEOMETRYCOLLECTION(POINT(-100 -100),LINESTRING(-100 -90,-90 -90),POLYGON((-100 -80,-90 -80,-95 -70,-100 -80),(-98 -78,-92 -78,-95 -72,-98 -78)),MULTIPOINT(-100 -110,-95 -110),LINESTRING EMPTY,MULTILINESTRING((-101 -90,-110 -90),(-110 -92,-102 -91)),MULTIPOLYGON(((0 -80,10 -80,5 -70,0 -80),(2 -78,8 -78,5 -72,2 -78)),((-20 -80,-10 -80,-10 -40,-20 -80))))|GEOMETRYCOLLECTION(MULTIPOLYGON(((-95 -70,-90 -80,-100 -80,-95 -70),(-92 -78,-95 -72,-98 -78,-92 -78)),((-10 -80,-20 -80,-10 -40,-10 -80)),((10 -80,0 -80,5 -70,10 -80),(5 -72,2 -78,8 -78,5 -72))),MULTILINESTRING((-110 -92,-102 -91),(-101 -90,-110 -90),(-100 -90,-90 -90)),MULTIPOINT(-100 -110,-100 -100,-95 -110))
 MULTIPOINT EMPTY
 MULTIPOINT EMPTY
 MULTILINESTRING EMPTY

GEOS 3.9, MacOS. I've tried some different kinds of normalizing but I just don't understand what's happening under the hood enough to fix this.

[robe]

Sorry didn't see this one when I submitted mine complaining about the same thing.

This is the same as #4809 which I have fixed.