fix an issue with InvalidMatrixParameterTypes along with updating the matrix example with additional validations

examples/v1/pipelineruns/alpha/pipelinerun-with-matrix.yaml

@@ -64,6 +64,46 @@ spec:
             - name: echo
               image: ubuntu
               script: exit 1
+      - name: matrix-with-task-using-onerror
+        matrix:
+          params:
+            - name: version
+              value:
+                - "1"
+                - "2"
+        taskSpec:
+          params:
+            - name: version
+          steps:
+            - name: echo
+              image: ubuntu
+              onError: continue
+              script: exit 1
+      - name: matrix-with-task-retries
+        retries: 1
+        params:
+          - name: pipelineTask-retries
+            value: $(context.pipelineTask.retries)
+        matrix:
+          params:
+            - name: version
+              value:
+                - "1"
+                - "2"
+        taskSpec:
+          params:
+            - name: version
+            - name: pipelineTask-retries
+          steps:
+            - image: alpine
+              script: |
+                #!/usr/bin/env sh
+                if [ "$(context.task.retry-count)" == "$(params.pipelineTask-retries)" ]; then
+                  echo "This is the last retry."
+                  exit 0;
+                fi
+                echo "The PipelineTask has retried $(context.task.retry-count) times."
+                exit 1
     finally:
       - name: matrix-params-with-empty-array-skipped-in-finally
         matrix:

pkg/reconciler/pipelinerun/pipelinerun.go

@@ -121,7 +121,7 @@ const (
 	// all of the running TaskRuns as timed out failed.
 	ReasonCouldntTimeOut = "PipelineRunCouldntTimeOut"
 	// ReasonInvalidMatrixParameterTypes indicates a matrix contains invalid parameter types
-	ReasonInvalidMatrixParameterTypes = "ReasonInvalidMatrixParameterTypes"
+	ReasonInvalidMatrixParameterTypes = "InvalidMatrixParameterTypes"
 	// ReasonInvalidTaskResultReference indicates a task result was declared
 	// but was not initialized by that task
 	ReasonInvalidTaskResultReference = "InvalidTaskResultReference"