That's still not right. Don't generate a tile with no layers.

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 1.12.5
+
+* Be careful not to produce an empty tile if there was a feature with
+  empty geometry.
+
 ## 1.12.4
 
 * Be even more careful not to produce features with empty geometry

tests/empty-linestring/out/-ac.json

@@ -64,9 +64,6 @@
 ] }
 ] }
 ,
-{ "type": "FeatureCollection", "properties": { "zoom": 11, "x": 328, "y": 791 }, "features": [
-] }
-,
 { "type": "FeatureCollection", "properties": { "zoom": 12, "x": 650, "y": 1578 }, "features": [
 { "type": "FeatureCollection", "properties": { "layer": "in", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": {  }, "geometry": { "type": "LineString", "coordinates": [ [ -122.822235, 38.090509 ], [ -122.822213, 38.090543 ] ] } }

tile.cpp

@@ -1061,7 +1061,7 @@ long long write_tile(FILE *geoms, long long *geompos_in, char *metabase, char *s
 			oprogress = progress;
 		}
 
-		if (totalsize > 0) {
+		if (totalsize > 0 && tile.layers.size() > 0) {
 			if (totalsize > 200000 && !prevent[P_FEATURE_LIMIT]) {
 				fprintf(stderr, "tile %d/%u/%u has %lld features, >200000    \n", z, tx, ty, totalsize);
 				fprintf(stderr, "Try using -B to set a higher base zoom level.\n");

version.hpp

@@ -1 +1 @@
-#define VERSION "tippecanoe v1.12.4\n"
+#define VERSION "tippecanoe v1.12.5\n"