Consider the following piece of code:
int main() {
int *i = nullptr;
delete i;
}
Questions:
- Is deleting a null pointer considered undefined behaviour?
- Did something changed in C++11 or C++14?
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Johannes Schaub - litb
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5This question has a [zillion duplicates](https://www.google.co.uk/search?q=c%2B%2B+delete+null+pointer+site%3Astackoverflow.com)... – Oliver Charlesworth Sep 08 '14 at 22:49
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6@40two So unclear that you need to search for *c++ delete null pointer* to find them :P – Praetorian Sep 08 '14 at 22:52
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you did have different spellings re "NULL pointer" and "null pointer". I made both of them say "null pointer", which is the technical correct spelling. – Johannes Schaub - litb Sep 13 '14 at 12:00
1 Answers
5
Is deleting a NULL pointer in C++ considered undefined behaviour?
No, this is perfectly legal operation.
From N3242, [expr.delete]
the value of the operand of delete may be a null pointer value
AlexD
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It's quoted in [this answer](http://stackoverflow.com/a/4190733/207421). – user207421 Sep 08 '14 at 22:56