[rtemodel] Fix nullptr exception in RteCallback::ExpandString

libs/rtemodel/src/RteCallback.cpp

@@ -87,10 +87,14 @@ string RteCallback::ExpandString(const string& str) {
   if (!activeTarget) {
     return RteUtils::EMPTY_STRING;
   }
+  const auto devicePackage = activeTarget->GetDevicePackage();
+  if (!devicePackage) {
+    return RteUtils::EMPTY_STRING;
+  }
 
   const string& prjPath(activeProject->GetProjectPath());
   const string& prjPathFile(prjPath + activeProject->GetName() + ".cprj");
-  const string& packPath(activeTarget->GetDevicePackage()->GetAbsolutePackagePath());
+  const string& packPath(devicePackage->GetAbsolutePackagePath());
   const string& deviceName(activeTarget->GetDeviceName());
   const string& generatorInputFile(activeTarget->GetGeneratorInputFile());
 

tools/projmgr/test/data/TestGenerator/test-gpdsc-error.csolution.yml

@@ -0,0 +1,17 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/Open-CMSIS-Pack/devtools/main/tools/projmgr/schemas/csolution.schema.json
+
+solution:  
+  target-types:
+    - type: CM0
+      device: RteTestGen_ARMCM0
+      compiler: AC6
+      optimize: balanced
+
+  build-types:
+    - type: Debug
+
+    - type: Release
+      optimize: none # optimize redefinition from target-type to build-type is not allowed
+
+  projects:
+    - project: ./test-gpdsc.cproject.yml

tools/projmgr/test/src/ProjMgrUnitTests.cpp

@@ -5428,3 +5428,17 @@ TEST_F(ProjMgrUnitTests, Executes) {
   auto errStr = streamRedirect.GetErrorString();
   EXPECT_NE(string::npos, errStr.find("error csolution: context 'unknown.Debug+RteTest_ARMCM3' referenced by access sequence 'elf' is not compatible"));
 }
+
+TEST_F(ProjMgrUnitTests, RunProjMgr_GeneratorError) {
+  char* argv[6];
+  StdStreamRedirect streamRedirect;
+  const string& csolution = testinput_folder + "/TestGenerator/test-gpdsc-error.csolution.yml";
+  argv[1] = (char*)"convert";
+  argv[2] = (char*)"--solution";
+  argv[3] = (char*)csolution.c_str();
+  argv[4] = (char*)"-o";
+  argv[5] = (char*)testoutput_folder.c_str();
+  EXPECT_EQ(1, RunProjMgr(6, argv, 0));
+  auto errStr = streamRedirect.GetErrorString();
+  EXPECT_NE(string::npos, errStr.find("error csolution: redefinition from 'balanced' into 'none' is not allowed"));
+}