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https://www.reddit.com/r/ProgrammerHumor/comments/1w2m4qz/bugintroduceddebugging/p6v2hqb/?context=3
r/ProgrammerHumor • u/ClipboardCopyPaste • 2d ago
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They are core C functions. malloc allocates N bytes of memory, free frees that memory. * is t he dereference operator, so *x is trying to dereference freed memory, which is undefined behavior
3 u/DiodeInc 2d ago I thought * was a pointer. Isn't it? How is it dereferencing freed memory? Or is it because it's returning *x that's the bug? 3 u/ThomasScotford 2d ago * is the dereference operator, but in the context of variable declaration, it specifies the variable is a pointer to a type. -Thomas Scotford 1 u/ArjixGamer 2d ago Why are you leaving a name signature in your comment, when your username is the same as that name?
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I thought * was a pointer. Isn't it? How is it dereferencing freed memory?
Or is it because it's returning *x that's the bug?
3 u/ThomasScotford 2d ago * is the dereference operator, but in the context of variable declaration, it specifies the variable is a pointer to a type. -Thomas Scotford 1 u/ArjixGamer 2d ago Why are you leaving a name signature in your comment, when your username is the same as that name?
* is the dereference operator, but in the context of variable declaration, it specifies the variable is a pointer to a type.
-Thomas Scotford
1 u/ArjixGamer 2d ago Why are you leaving a name signature in your comment, when your username is the same as that name?
1
Why are you leaving a name signature in your comment, when your username is the same as that name?
26
u/LucyShortForLucas 2d ago
They are core C functions. malloc allocates N bytes of memory, free frees that memory. * is t he dereference operator, so *x is trying to dereference freed memory, which is undefined behavior