1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java b/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
index 68a70ed..b145b65 100644
--- a/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
+++ b/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
@@ -50,7 +50,7 @@ public class JavaReader {
     public static List<TypeNode> readClassFromFile(List<Path> sourcePaths, Path sourcePath) throws IOException {
         CompilationUnit ast = new JavaParser().parseCompilationUnit(sourcePaths, sourcePath);
 
-        ImmutableList<IProblem> errors = ImmutableList.copyOf(filter(asList(ast.getProblems()), problem -> problem.isError()));
+        List<IProblem> errors = eagerFilter(asList(ast.getProblems()), problem -> problem.isError());
         if (!errors.isEmpty()) {
             throw new RuntimeException("Errors during parsing:\n\n" + describe(errors));
         }