diff --git a/src/journal.re.c b/src/journal.re.c
index 3993f78..d857808 100644
--- a/src/journal.re.c
+++ b/src/journal.re.c
@@ -145,7 +145,7 @@ struct journal journal(const char *const dir_journal) {
 	if(closedir(dir)) { dir = 0; goto catch; } dir = 0;
 	/* Sort the years. */
 	qsort(years.data, years.size, sizeof *years.data, &void_int_cmp);
-	fprintf(stderr, "Years in <<%s>>: %s.\n",
+	fprintf(stderr, "Loading years in <<%s>>: %s.\n",
 		dir_journal, int_array_to_string(&years));
 
 	/* Go though each year. */
diff --git a/src/scan.re.c b/src/scan.re.c
index 9f4fdbd..b1ebe1f 100644
--- a/src/scan.re.c
+++ b/src/scan.re.c
@@ -207,12 +207,12 @@ static int scan_day(struct scan *const scan, union date32 date,
 		<line> "->" :=> place
 		<line> "--" / [^-] :=> source
 		<line> "::" / [^:] :=> score
-		<line> "[glider]" :=> glider_type
-		<line> "[flight]" :=> flight_type
 		<line> "[" :=> bracket
 
 		/* ^"[" ... */
 		<bracket> * { fail = "bracket unrecognized"; goto catch; }
+		<bracket> "glider] " :=> glider_type
+		<bracket> "flight]" :=> flight_type
 		<bracket> "document: " :=> document
 		<bracket> "rem: " :=> remark
 		<bracket> "contact: " :=> contact
@@ -222,6 +222,13 @@ static int scan_day(struct scan *const scan, union date32 date,
 		<bracket> "idea: " :=> idea
 		<bracket> "vaccine: " :=> vaccine
 		<bracket> "tax: " :=> tax
+		/* Whatsapp messages ignored. [11-03, 04:19] Contact: massage */
+		<bracket> [0-1][0-9] "-" [0-3][0-9] ", " [0-2][0-9] ":" [0-5][0-9] "] "
+			@s0 [^\x00\n:] @s1 ": " [^\x00\n] "\n" => line {
+			fprintf(stderr, "Whatsapp message from %.*s ignored.\n",
+				(int)(s1 - s0), s0);
+			continue;
+		}
 
 		<document> * { fail = "document title"; goto catch; }
 		<document> @s0 bralabel @s1 "]" => input_text {
@@ -843,12 +850,8 @@ catch:
 }
 
 void scan_(struct scan *const scan) {
-	fprintf(stderr, "fixme: ~scan should be idempotent <<\n"); // now it is?
 	if(!scan) return;
-	// printing it made it so?
-	fprintf(stderr, "~scan kjv %s\n", kjv_tree_to_string(&scan->kjvs));
 	kjv_tree_(&scan->kjvs);
-	fprintf(stderr, "~scan finished kjv\n");
 	flight_tree_(&scan->flights);
 	glider_tree_(&scan->gliders);
 	linekvmoney_tree_(&scan->taxes);
@@ -858,7 +861,6 @@ void scan_(struct scan *const scan) {
 	linekvpair_tree_(&scan->tvs);
 	linekvpair_tree_(&scan->books);
 	linekvpair_tree_(&scan->contacts);
-	fprintf(stderr, "~scan finished linekvpair\n");
 
 	linemap_tree_(&scan->scores.dates);
 	pair_map_table_(&scan->scores.map);
@@ -879,7 +881,6 @@ void scan_(struct scan *const scan) {
 	linemap_tree_(&scan->sources.dates);
 	pair_map_table_(&scan->sources.map);
 	kvpair_array_(&scan->sources.array);
-	fprintf(stderr, "~scan finish >>\n");
 }
 
 /** @param[jrnl] Must be constant throughout the use of the returned value. */
diff --git a/src/tree.h b/src/tree.h
index 6d4c30c..0675ebd 100644
--- a/src/tree.h
+++ b/src/tree.h
@@ -245,7 +245,7 @@ static int PB_(next)(struct PB_(iterator) *const it) {
 	assert(it && it->root);
 
 	/* Tree empty. */
-	if(!it->root->node || it->root->height == UINT_MAX) return 0;
+	if(!it->root || !it->root->node || it->root->height == UINT_MAX) return 0;
 
 	/* Iterator empty; tree non-empty; point at first. */
 	if(!it->ref.node) {
@@ -292,7 +292,7 @@ static int PB_(previous)(struct PB_(iterator) *const it) {
 	assert(it && it->root);
 
 	/* Tree empty. */
-	if(!it->root->node || it->root->height == UINT_MAX) return 0;
+	if(!it->root || !it->root->node || it->root->height == UINT_MAX) return 0;
 
 	/* Iterator empty; tree non-empty; point at last. */
 	if(!it->ref.node) {