v8/test/mjsunit/regress/regress-crbug-178790.js

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// Flags: --stack-size=1200

// Create a regexp in the form of a?a?...a? so that fully
// traversing the entire graph would be prohibitively expensive.
// This should not cause time out.
var r1 = "";
for (var i = 0; i < 1000; i++) {
  r1 += "a?";
}
"test".match(RegExp(r1));

var r2 = "";
for (var i = 0; i < 100; i++) {
  r2 += "(a?|b?|c?|d?|e?|f?|g?)";
}
"test".match(RegExp(r2));

// Create a regexp in the form of ((..(a)a..)a.
// Compiling it causes EatsAtLeast to reach the maximum
// recursion depth possible with a given budget.
// This should not cause a stack overflow.
var r3 = "a";
for (var i = 0; i < 1000; i++) {
  r3 = "(" + r3 + ")a";
}
"test".match(RegExp(r3));