[postgis-tickets] [PostGIS] #3921: ALTER EXTENSION upgrade failing at ST_CurveToLine

[PostGIS]

#3921: ALTER EXTENSION upgrade failing at ST_CurveToLine
-----------------------------------+---------------------------
 Reporter:  robe                   |      Owner:  strk
     Type:  defect                 |     Status:  new
 Priority:  blocker                |  Milestone:  PostGIS 2.5.0
Component:  build/upgrade/install  |    Version:  trunk
 Keywords:                         |
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 After I resolved the make install issue at #3916

 this issue was uncovered on winnie

 {{{
 Preparing db 'postgis_reg' using: CREATE EXTENSION postgis
 Upgrading PostGIS in 'postgis_reg' using: ALTER EXTENSION postgis UPDATE
 TO '2.5.0devnext'
 Died at run_test.pl line 1423.
  failed (Error encountered altering EXTENSION POSTGIS:
 /projects/postgis/tmp/2.5.0dev_pg10_geos3.7.0dev_gdal2.2.2w64/regress_log)
 -----------------------------------------------------------------------------
 sh: createlang: command not found
 CREATE EXTENSION
 CREATE EXTENSION
 ERROR:  cannot remove parameter defaults from existing function
 HINT:  Use DROP FUNCTION st_curvetoline(geometry,double
 precision,integer,integer) first.
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3921>
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