When i insert a row into a geopoly table the shell crashes with a segfault.

Here is the .schema for the tables:
CREATE TABLE mt_locations(
  mt_id INT,
  locations_id TEXT,
  stop_name TEXT,
  stop_desc TEXT,
  comment TEXT,
  UNIQUE(mt_id, locations_id)
);
CREATE TABLE IF NOT EXISTS "mt_area_rowid"(rowid INTEGER PRIMARY KEY,nodeno,a0,a1,a2,a3);
CREATE TABLE IF NOT EXISTS "mt_area_node"(nodeno INTEGER PRIMARY KEY,data);
CREATE TABLE IF NOT EXISTS "mt_area_parent"(nodeno INTEGER PRIMARY KEY,parentnode);
CREATE VIRTUAL TABLE mt_area USING geopoly(
  mt_id INT,
  locations_id TEXT,
  FOREIGN KEY(mt_id, locations_id) REFERENCES mt_locations(mt_id, locations_id)
)
/* mt_area(
  _shape,
  mt_id,
  locations_id
) */;

Here is the series of statements in my test script:
BEGIN TRANSACTION;
INSERT OR REPLACE INTO mt_locations (mt_id,locations_id,stop_name,stop_desc,comment) VALUES ('19','loc_1',
'Plymouth Metrolink','City of Plymouth',' ');
DELETE FROM mt_area WHERE mt_id=19 and locations_id='loc_1';
INSERT INTO mt_area (mt_id,locations_id,_shape) VALUES (19,'loc_1','[[45.065712,-93.445484],[45.065710,-93.461458],
[45.065584,-93.522074],[45.065712,-93.445484]]');
Commit;

It is the insert into mt_area statement that is crashing.

gdb reports 
#0  0x080937bb in sqlite3_bind_value ()
#1  0x08115002 in geopolyUpdate ()
#2  0x080df1f0 in sqlite3VdbeExec ()
#3  0x080e078f in sqlite3_step ()

I am running SQLite 3.39.2 built from the amalgamation on Centos 6.

Can another set of eyes see what may be wrong with the insert statement?

Thank you.