Warn when closing an empty path instead of aborting.

1 files changed, 10 insertions, 0 deletions

diff --git a/fitz/node_path.c b/fitz/node_path.c
index f10fd982..c21de87a 100644
--- a/fitz/node_path.c
+++ b/fitz/node_path.c
@@ -95,6 +95,8 @@ fz_moveto(fz_pathnode *path, float x, float y)
 fz_error
 fz_lineto(fz_pathnode *path, float x, float y)
 {
+	if (path->len == 0)
+		return fz_throw("no current point");
 	if (growpath(path, 3) != fz_okay)
 		return fz_rethrow(-1, "out of memory");
 	path->els[path->len++].k = FZ_LINETO;
@@ -109,6 +111,8 @@ fz_curveto(fz_pathnode *path,
 		float x2, float y2,
 		float x3, float y3)
 {
+	if (path->len == 0)
+		return fz_throw("no current point");
 	if (growpath(path, 7) != fz_okay)
 		return fz_rethrow(-1, "out of memory");
 	path->els[path->len++].k = FZ_CURVETO;
@@ -138,6 +142,12 @@ fz_curvetoy(fz_pathnode *path, float x1, float y1, float x3, float y3)
 fz_error
 fz_closepath(fz_pathnode *path)
 {
+	if (path->len == 0)
+	{
+		fz_warn("tried to close an empty path");
+		return fz_okay;
+	}
+
 	if (growpath(path, 1) != fz_okay)
 		return fz_rethrow(-1, "out of memory");
 	path->els[path->len++].k = FZ_CLOSEPATH;