test/mjsunit/regress/regress-117409.js

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// Flags: --expose-gc

function KeyedStoreIC(a) { a[0] = Math.E; }

// Create literal with a fast double elements backing store
var literal = [1.2];

// Specialize the IC for fast double elements
KeyedStoreIC(literal);
KeyedStoreIC(literal);

// Truncate array to 0 elements, at which point backing store will be replaced
// with empty fixed array.
literal.length = 0;

// ArrayPush built-in will replace empty fixed array backing store with 19
// elements fixed array backing store.  This leads to a mismatch between the map
// and the backing store.  Debug mode will crash here in set_elements accessor.
literal.push(Math.E, Math.E);

// Corrupt the backing store!
KeyedStoreIC(literal);

// Release mode will crash here when trying to visit parts of E as pointers.
gc();