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+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.findindex
+es6id: 22.2.3.11
+description: >
+  Predicate may detach the buffer
+info: |
+  22.2.3.11 %TypedArray%.prototype.findIndex ( predicate [ , thisArg ] )
+
+  %TypedArray%.prototype.findIndex is a distinct function that implements the
+  same algorithm as Array.prototype.findIndex as defined in 22.1.3.9 except that
+  the this object's [[ArrayLength]] internal slot is accessed in place of
+  performing a [[Get]] of "length".
+
+  ...
+
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  6. Repeat, while k < len
+    ...
+    b. Let kValue be ? Get(O, Pk).
+    c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)).
+  ...
+
+  9.4.5.8 IntegerIndexedElementGet ( O, index )
+
+  ...
+  3. Let buffer be the value of O's [[ViewedArrayBuffer]] internal slot.
+  4. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
+  ...
+includes: [testBigIntTypedArray.js, detachArrayBuffer.js]
+features: [BigInt, TypedArray]
+---*/
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  var sample = new TA(2);
+  var loops = 0;
+  var completion = false;
+
+  assert.throws(TypeError, function() {
+    sample.findIndex(function() {
+      loops++;
+      $DETACHBUFFER(sample.buffer);
+      completion = true;
+    });
+  }, "throws a TypeError getting a value from the detached buffer");
+
+  assert.sameValue(loops, 1, "predicated is called once");
+  assert(completion, "abrupt completion does not come from DETACHBUFFER");
+});