1.7.15: NativeRegexp calls ScriptRuntime.addInstructionCount when instruction counting is not enabled

[rde2]

org.mozilla.javascript.regexp.NativeRegExp at line 1891 does:

ScriptRuntime.addInstructionCount(cx, 5);

this will trigger a call to observeInstructionCount even if instructionThreshold is 0.

To reproduce, create a Context class which overrides observeInstructionCount and use regexps. observeInstructionCount will be called even though setInstructionObserverThreshold has not been called

[rbri]

@rde2 thanks for that report. Please have a look at the provided PR - hopefully you agree with the test case (and the fix).