diff --git a/docs/src/reference-verbs.md b/docs/src/reference-verbs.md
index 3eb176dde..c3e121644 100644
--- a/docs/src/reference-verbs.md
+++ b/docs/src/reference-verbs.md
@@ -3857,6 +3857,21 @@ mean       -   -   5000.5 0.49860196816795804 0.5062057444929905
 median     pan pan 5001   0.5011592202840128  0.5060212582772865
 </pre>
 
+## surv
+
+<pre class="pre-highlight-in-pair">
+<b>mlr surv --help</b>
+</pre>
+<pre class="pre-non-highlight-in-pair">
+Usage: mlr surv -d {duration-field} -s {status-field}
+
+Estimate Kaplan-Meier survival curve (right-censored).
+Options:
+  -d {field}   Name of duration field (time-to-event or censoring).
+  -s {field}   Name of status field (0=censored, 1=event).
+  -h, --help   Show this message.
+</pre>
+
 ## tac
 
 <pre class="pre-highlight-in-pair">
diff --git a/docs/src/reference-verbs.md.in b/docs/src/reference-verbs.md.in
index 8959ebf6b..5f6f31097 100644
--- a/docs/src/reference-verbs.md.in
+++ b/docs/src/reference-verbs.md.in
@@ -1161,6 +1161,12 @@ GENMD-RUN-COMMAND
 mlr --from data/medium --opprint summary --transpose -a mean,median,mode
 GENMD-EOF
 
+## surv
+
+GENMD-RUN-COMMAND
+mlr surv --help
+GENMD-EOF
+
 ## tac
 
 GENMD-RUN-COMMAND
diff --git a/pkg/output/channel_writer.go b/pkg/output/channel_writer.go
index 3a8cab8e4..ac025398b 100644
--- a/pkg/output/channel_writer.go
+++ b/pkg/output/channel_writer.go
@@ -72,7 +72,6 @@ func channelWriterHandleBatch(
 			// XXX also make sure this results in exit 1 & goroutine cleanup
 			if writerOptions.FailOnDataError && record != nil {
 				ok := true
-				fmt.Printf("AAA %#v", record)
 				for pe := record.Head; pe != nil; pe = pe.Next {
 					if pe.Value.IsError() {
 						context := recordAndContext.Context