don't fail with NPE on absence of reference (instance)

dslmeinte · Jul 3, 2019 · b4fd1f3 · b4fd1f3
1 parent eaac379
commit b4fd1f3
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/mps-inspector/pom.xml b/mps-inspector/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>nl.dslconsultancy.mps</groupId>
     <artifactId>mps-inspector</artifactId>
-    <version>0.2.1</version>
+    <version>0.2.2</version>
     <packaging>jar</packaging>
 
     <name>MPS Inspector</name>

diff --git a/mps-inspector/src/main/kotlin/nl/dslconsultancy/mps/inspector/xml/modelXml.kt b/mps-inspector/src/main/kotlin/nl/dslconsultancy/mps/inspector/xml/modelXml.kt
@@ -173,7 +173,7 @@ fun NodeXml.theseChildren(featureDecl: MetaFeatureXml?): Iterable<NodeXml> =
     if (featureDecl == null) emptyList() else children.filter { it.role == featureDecl.index }
 
 fun NodeXml.thisReference(featureDecl: MetaFeatureXml?): ReferenceXml? =
-    if (featureDecl == null) null else references.filter { it.role == featureDecl.index }[0]
+    if (featureDecl == null) null else references.filter { it.role == featureDecl.index }.getOrNull(0)
 
 
 // primarily intended for memoising: {@code memois.of(src to dst()).apply { ... }}