[geos-commits] [SCM] GEOS branch main updated. fc0722fcc2cd925e0a4d445a93f630b5ea4c9f07

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- Log -----------------------------------------------------------------
commit fc0722fcc2cd925e0a4d445a93f630b5ea4c9f07
Author: Dan Baston <dbaston at gmail.com>
Date:   Wed Jun 19 21:07:40 2024 -0400

    GEOSConcaveHullOfPolygons: Avoid crash on zero-area input (#1076)
    
    * GEOSConcaveHullOfPolygons: Avoid crash on zero-area input
    
    Resolves https://github.com/libgeos/geos/issues/1071

diff --git a/src/algorithm/hull/ConcaveHullOfPolygons.cpp b/src/algorithm/hull/ConcaveHullOfPolygons.cpp
index d0ab8e426..6ed54fb0a 100644
--- a/src/algorithm/hull/ConcaveHullOfPolygons.cpp
+++ b/src/algorithm/hull/ConcaveHullOfPolygons.cpp
@@ -156,7 +156,7 @@ ConcaveHullOfPolygons::setTight(bool p_isTight)
 std::unique_ptr<Geometry>
 ConcaveHullOfPolygons::getHull()
 {
-    if (inputPolygons->isEmpty()) {
+    if (inputPolygons->isEmpty() || inputPolygons->getArea() == 0) {
         return createEmptyHull();
     }
     buildHullTris();
diff --git a/tests/unit/capi/GEOSConcaveHullOfPolygonsTest.cpp b/tests/unit/capi/GEOSConcaveHullOfPolygonsTest.cpp
index 57c6a0b9c..2cd039fb5 100644
--- a/tests/unit/capi/GEOSConcaveHullOfPolygonsTest.cpp
+++ b/tests/unit/capi/GEOSConcaveHullOfPolygonsTest.cpp
@@ -62,6 +62,15 @@ void object::test<3>()
     result_ = GEOSConcaveHullOfPolygons(input_, 0.7, false, false);
     ensure("curved geometry not supported", result_ == nullptr);
 }
+  
+template<>
+template<>
+void object::test<4>()
+{
+    input_ = fromWKT("POLYGON((0 0, 0 0, 0 0))");
+    result_ = GEOSConcaveHullOfPolygons(input_, 0.7, false, false);
+    ensure(GEOSisEmpty(result_));
+}
 
 
 } // namespace tut

-----------------------------------------------------------------------

Summary of changes:
 src/algorithm/hull/ConcaveHullOfPolygons.cpp      | 2 +-
 tests/unit/capi/GEOSConcaveHullOfPolygonsTest.cpp | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)


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