ConfigurationAsCode::collectProblems: add check for null key in issue… (#2316)

Co-authored-by: Swen Thümmler <[email protected]>

Author: grmblfrz

plugin/src/main/java/io/jenkins/plugins/casc/ConfigurationAsCode.java

@@ -58,6 +58,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Scanner;
 import java.util.Set;
 import java.util.TreeSet;
@@ -262,7 +263,13 @@ public FormValidation doCheckNewSource(@QueryParameter String newSource) {
     private JSONArray collectProblems(Map<Source, String> issues, String severity) {
         final JSONArray problems = new JSONArray();
         issues.entrySet().stream()
-                .map(e -> new JSONObject().accumulate("line", e.getKey().line).accumulate(severity, e.getValue()))
+                .map(e -> new JSONObject()
+                        .accumulate(
+                                "line",
+                                Optional.ofNullable(e.getKey())
+                                        .map(it -> it.line)
+                                        .orElse(-1))
+                        .accumulate(severity, e.getValue()))
                 .forEach(problems::add);
         return problems;
     }