Merge pull request #20160 from calixteman/issue20155

Check the setDash arguments

src/core/evaluator.js

@@ -2206,6 +2206,22 @@ class PartialEvaluator {
             args[0] = Math.abs(thickness);
             break;
           }
+          case OPS.setDash: {
+            const dashPhase = args[1];
+            if (typeof dashPhase !== "number") {
+              warn(`Invalid setDash: ${dashPhase}`);
+              continue;
+            }
+            const dashArray = args[0];
+            if (!Array.isArray(dashArray)) {
+              warn(`Invalid setDash: ${dashArray}`);
+              continue;
+            }
+            if (dashArray.some(x => typeof x !== "number")) {
+              args[0] = dashArray.filter(x => typeof x === "number");
+            }
+            break;
+          }
           case OPS.moveTo:
           case OPS.lineTo:
           case OPS.curveTo:

test/unit/evaluator_spec.js

@@ -357,6 +357,18 @@ describe("evaluator", function () {
       expect(result.argsArray).toEqual([]);
       expect(result.fnArray).toEqual([]);
     });
+
+    it("should handle invalid dash stuff", async function () {
+      const stream = new StringStream("[ none ] 0 d");
+      const result = await runOperatorListCheck(
+        partialEvaluator,
+        stream,
+        new ResourcesMock()
+      );
+      expect(result.argsArray[0][0]).toEqual([]);
+      expect(result.argsArray[0][1]).toEqual(0);
+      expect(result.fnArray[0]).toEqual(OPS.setDash);
+    });
   });
 
   describe("thread control", function () {