diff --git a/lib/loadObj.js b/lib/loadObj.js
index c46b13b..e893ab5 100644
--- a/lib/loadObj.js
+++ b/lib/loadObj.js
@@ -196,6 +196,9 @@ function loadObj(objPath, options) {
     function createVertex(p, u, n) {
         // Positions
         if (defined(p) && (globalPositions.length > 0)) {
+            if (p * 3 >= globalPositions.length) {
+                throw new RuntimeError(`Position index ${p} is out of bounds`);
+            }
             const px = globalPositions.get(p * 3);
             const py = globalPositions.get(p * 3 + 1);
             const pz = globalPositions.get(p * 3 + 2);
@@ -206,6 +209,9 @@ function loadObj(objPath, options) {
 
         // Normals
         if (defined(n) && (globalNormals.length > 0)) {
+            if (n * 3 >= globalNormals.length) {
+                throw new RuntimeError(`Normal index ${n} is out of bounds`);
+            }
             const nx = globalNormals.get(n * 3);
             const ny = globalNormals.get(n * 3 + 1);
             const nz = globalNormals.get(n * 3 + 2);
@@ -216,6 +222,9 @@ function loadObj(objPath, options) {
 
         // UVs
         if (defined(u) && (globalUvs.length > 0)) {
+            if (u * 2 >= globalUvs.length) {
+                throw new RuntimeError(`UV index ${u} is out of bounds`);
+            }
             const ux = globalUvs.get(u * 2);
             const uy = globalUvs.get(u * 2 + 1);
             primitive.uvs.push(ux);
diff --git a/lib/readLines.js b/lib/readLines.js
index d4a4c1b..e740ef1 100644
--- a/lib/readLines.js
+++ b/lib/readLines.js
@@ -23,6 +23,15 @@ function readLines(path, callback) {
         const lineReader = readline.createInterface({
             input : stream
         });
-        lineReader.on('line', callback);
+        
+        const callbackWrapper = function(line) {
+            try {
+                callback(line);
+            } catch (error) {
+                reject(error);
+            }
+        };
+
+        lineReader.on('line', callbackWrapper);
     });
 }
diff --git a/specs/data/box-incomplete-attributes/box-incomplete-normals.obj b/specs/data/box-incomplete-attributes/box-incomplete-normals.obj
new file mode 100644
index 0000000..328214c
--- /dev/null
+++ b/specs/data/box-incomplete-attributes/box-incomplete-normals.obj
@@ -0,0 +1,36 @@
+o Cube
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 0.0000
+vt 0.0000 1.0000
+vn 0.000000 0.000000 1.000000
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9/3 8/10/3 6/11/3 5/12/3
+f 5/13/4 6/14/4 2/15/4 1/16/4
+f 3/5/5 7/17/5 5/18/5 1/16/5
+f 8/19/6 4/6/6 2/15/6 6/20/6
diff --git a/specs/data/box-incomplete-attributes/box-incomplete-positions.obj b/specs/data/box-incomplete-attributes/box-incomplete-positions.obj
new file mode 100644
index 0000000..789bb2d
--- /dev/null
+++ b/specs/data/box-incomplete-attributes/box-incomplete-positions.obj
@@ -0,0 +1,34 @@
+o Cube
+v -1.000000 -1.000000 1.000000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 0.0000
+vt 0.0000 1.0000
+vn -1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9/3 8/10/3 6/11/3 5/12/3
+f 5/13/4 6/14/4 2/15/4 1/16/4
+f 3/5/5 7/17/5 5/18/5 1/16/5
+f 8/19/6 4/6/6 2/15/6 6/20/6
diff --git a/specs/data/box-incomplete-attributes/box-incomplete-uvs.obj b/specs/data/box-incomplete-attributes/box-incomplete-uvs.obj
new file mode 100644
index 0000000..fb87835
--- /dev/null
+++ b/specs/data/box-incomplete-attributes/box-incomplete-uvs.obj
@@ -0,0 +1,22 @@
+o Cube
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+vt 0.0000 0.0000
+vn -1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9/3 8/10/3 6/11/3 5/12/3
+f 5/13/4 6/14/4 2/15/4 1/16/4
+f 3/5/5 7/17/5 5/18/5 1/16/5
+f 8/19/6 4/6/6 2/15/6 6/20/6
diff --git a/specs/lib/loadObjSpec.js b/specs/lib/loadObjSpec.js
index a51611e..deef264 100644
--- a/specs/lib/loadObjSpec.js
+++ b/specs/lib/loadObjSpec.js
@@ -42,6 +42,9 @@ const objConcavePath = 'specs/data/concave/concave.obj';
 const objUnnormalizedPath = 'specs/data/box-unnormalized/box-unnormalized.obj';
 const objMixedAttributesPath = 'specs/data/box-mixed-attributes/box-mixed-attributes.obj';
 const objMissingAttributesPath = 'specs/data/box-missing-attributes/box-missing-attributes.obj';
+const objIncompletePositionsPath = 'specs/data/box-incomplete-attributes/box-incomplete-positions.obj'
+const objIncompleteNormalsPath = 'specs/data/box-incomplete-attributes/box-incomplete-normals.obj'
+const objIncompleteUvsPath = 'specs/data/box-incomplete-attributes/box-incomplete-uvs.obj'
 const objInvalidPath = 'invalid.obj';
 
 function getMeshes(data) {
@@ -505,6 +508,36 @@ describe('loadObj', () => {
         expect(primitive.uvs.length).toBe(0);
     });
 
+    it('throws when position index is out of bounds', async () => {
+        let thrownError;
+        try {
+            await loadObj(objIncompletePositionsPath, options);
+        } catch (e) {
+            thrownError = e;
+        }
+        expect(thrownError).toEqual(new RuntimeError('Position index 1 is out of bounds'));
+    });
+
+    it('throws when normal index is out of bounds', async () => {
+        let thrownError;
+        try {
+            await loadObj(objIncompleteNormalsPath, options);
+        } catch (e) {
+            thrownError = e;
+        }
+        expect(thrownError).toEqual(new RuntimeError('Normal index 1 is out of bounds'));
+    });
+
+    it('throws when uv index is out of bounds', async () => {
+        let thrownError;
+        try {
+            await loadObj(objIncompleteUvsPath, options);
+        } catch (e) {
+            thrownError = e;
+        }
+        expect(thrownError).toEqual(new RuntimeError('UV index 1 is out of bounds'));
+    });
+
     it('throws when file has invalid contents', async () => {
         let thrownError;
         try {