fix: Make analyse exceptions propagated to Extended Api responses. #960

Author: ishche

server/src/main/java/org/eclipse/lsp/cobol/service/CobolTextDocumentService.java

@@ -350,6 +350,7 @@ private void analyzeDocumentFirstTime(String uri, String text, boolean userReque
                         });
                     cfAstMap.get(uri).complete(result.getRootNode());
                   } catch (Exception e) {
+                    cfAstMap.get(uri).completeExceptionally(e);
                     LOG.error(createDescriptiveErrorMessage("analysis", uri), e);
                   } finally {
                     clearAnalysedFutureObject(uri);
@@ -400,6 +401,7 @@ void analyzeChanges(String uri, String text) {
                     outlineMap.get(uri).complete(result.getOutlineTree());
                     cfAstMap.get(uri).complete(result.getRootNode());
                   } catch (Exception ex) {
+                    cfAstMap.get(uri).completeExceptionally(ex);
                     LOG.error(createDescriptiveErrorMessage("analysis", uri), ex);
                   } finally {
                     clearAnalysedFutureObject(uri);