foreach: Set fatal error on invalid range

Fixes: #20394

Source/cmForEachCommand.cxx

@@ -428,6 +428,7 @@ bool cmForEachCommand(std::vector<std::string> const& args,
         status.SetError(
           cmStrCat("called with incorrect range specification: start ", start,
                    ", stop ", stop, ", step ", step));
+        cmSystemTools::SetFatalErrorOccured();
         return false;
       }
 

Tests/RunCMake/foreach/RunCMakeTest.cmake

@@ -18,3 +18,4 @@ run_cmake(foreach-RANGE-non-int-test-2-2)
 run_cmake(foreach-RANGE-non-int-test-3-1)
 run_cmake(foreach-RANGE-non-int-test-3-2)
 run_cmake(foreach-RANGE-non-int-test-3-3)
+run_cmake(foreach-RANGE-invalid-test)

Tests/RunCMake/foreach/foreach-RANGE-invalid-test-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/foreach/foreach-RANGE-invalid-test-stderr.txt

@@ -0,0 +1,4 @@
+^CMake Error at foreach-RANGE-invalid-test\.cmake:[0-9]+ \(foreach\):
+  foreach called with incorrect range specification: start 2, stop 1, step 1
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:3 \(include\)$

Tests/RunCMake/foreach/foreach-RANGE-invalid-test.cmake

@@ -0,0 +1,2 @@
+foreach(a RANGE 2 1 1)
+endforeach()