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1. Embed this notice
   nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 13:50:28 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:
   ALRIGHT THATS 83 LINES OF LINKED LIST CREATION CODE LETS SEE IF THIS WORKS FIRST TRY
   • soberano likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 13:51:27 JST pwm

     in reply to
     @nyanide you_dereferenced_a_null_pointer.mpeg
     prettygood repeated this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:06:32 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • pwm
     @pwm :kannadie:
     prettygood and pwm like this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:07:13 JST pwm

     in reply to
     @nyanide CALLED IT
     prettygood likes this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:12:33 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • pwm
     @pwm omg even better, it segfaulted at a free lmfao
     pwm likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:13:14 JST pwm

     in reply to
     @nyanide YOU FREED AN INVALID POINTER
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: likes this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:17:10 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • pwm
     @pwm uh, it tried to free NULL which i thought free would just ignore
     pwm likes this.
     pwm repeated this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:17:46 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • pwm
     @pwm idk maybe i dreamt this but i remember saying "omg free actually freed null!!!" and people were telling me "its in the spec buckaroo" and i was mystified
     pwm likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:19:36 JST pwm

     in reply to
     @nyanide You can't free NULL, why would you ever free null? Only thing I could come up with is some sort of way to signal an internal state in free() but there is no such state
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: likes this.
   • Embed this notice
     :ihavenomouth: (inginsub@clubcyberia.co)'s status on Saturday, 03-May-2025 14:19:39 JST :ihavenomouth:

     in reply to

     • pwm
     @nyanide @pwm it wasn’t null enough
     pwm likes this.
   • Embed this notice
     Hildegunst von Mythenmetz of programming (condret@shitposter.world)'s status on Saturday, 03-May-2025 14:19:55 JST Hildegunst von Mythenmetz of programming

     in reply to

     • pwm
     @nyanide @pwm it should ignore that
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:20:11 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • pwm
     @pwm i just wanted to be lazy and ignore null checking
     pwm likes this.
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:20:25 JST gentoobro

     in reply to

     • pwm

     #define free(x) do { if(x) free(x); } while(0)

     pwm likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:20:49 JST pwm

     in reply to

     • Hildegunst von Mythenmetz of programming
     @condret @nyanide My guess is that it's undefined behavior/implementation defined
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: likes this.
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:20:55 JST gentoobro

     in reply to

     • pwm

     Also, if you don't know about and use valgrind, you should.

     pwm likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:21:16 JST pwm

     in reply to

     • gentoobro
     @gentoobro @nyanide It's CY10, everyone hardnosed enough to still use C knows about valgrind (I think)
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: likes this.
   • Embed this notice
     :ihavenomouth: (inginsub@clubcyberia.co)'s status on Saturday, 03-May-2025 14:21:32 JST :ihavenomouth:

     in reply to

     • pwm
     @nyanide @pwm free does that internally
     Forest of Enchantment and nyanide :nyancat_rainbow::nyancat_body::nyancat_face: like this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:21:34 JST pwm

     in reply to

     • gentoobro
     • pwm
     @gentoobro @nyanide Though he might still be a lazy bum
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: likes this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:23:03 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • gentoobro
     • pwm
     @gentoobro @pwm i use it all the time when i write code, i'm planning to use it to try to find any potential memory leaks in this questionable code later
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:24:18 JST gentoobro

     in reply to

     • pwm

     You never know. It's not mentioned in a lot of tutorials, and if you're working on a linked list and getting basic errors, you might be new. I don't keep track of who's at what general level.

     pwm likes this.
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: repeated this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:24:35 JST pwm

     in reply to

     • gentoobro
     @gentoobro @nyanide kirby is just drunk and high and can't remember up from down
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:26:10 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • gentoobro
     • pwm
     @pwm @gentoobro i'll prove your point: i don't actually know what free free'd, i just saw these 2 lines and assumed it free'd NULL even though failure calls a helper function which destroys the linked list
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:26:46 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • gentoobro
     • pwm
     @pwm @gentoobro i like, need to get myself checked out i swear
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:27:24 JST pwm

     in reply to

     • gentoobro
     @nyanide @gentoobro Well if your helper function frees the data pointed too by the field string then that's your problem, you are explicitly freeing null when it's null
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:27:42 JST pwm

     in reply to

     • gentoobro
     • pwm
     @nyanide @gentoobro and if that doesn't check before freeing then that's that
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:28:00 JST gentoobro

     in reply to

     • pwm

     It didn't fall back into the debugger so you could inspect it?

     You weren't testing code outside of a debugger were you? ... were you?

   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:28:00 JST pwm

     in reply to

     • gentoobro
     @gentoobro @nyanide debugger is bloat, god gave us printf
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:30:36 JST pwm

     in reply to

     • gentoobro
     @gentoobro @nyanide macros are bloat debuggers are bloat everything I don't like is bloat
     
     I use clion btw
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:30:37 JST gentoobro

     in reply to

     • pwm

     Debugger tells you where your shit crashed, and lets you see which variable is at fault.

     Also, wrap your printf something like this:

     #define dbg(fmt, ...) dprintf(STDERR_FILENO, "%s:%d " fmt "\n", strstr(__FILE__, "src/"), __LINE__ __VA_OPT__(,) __VA_ARGS__);
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:30:52 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • gentoobro
     • pwm
     @gentoobro @pwm my mind is literally scrambled eggs dude
     
     here's whats happening:
     - failure state is triggered
     - i go to mindlessly say that free somehow segfaulted at freeing null
     - i then realize after like 5 posts that that was not the case and came to the correct conclusion that something in the helper function went wrong
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:31:37 JST gentoobro

     in reply to

     • pwm

     Proper C should be 70% macros.

     pwm likes this.
   • Embed this notice
     Hildegunst von Mythenmetz of programming (condret@shitposter.world)'s status on Saturday, 03-May-2025 14:31:42 JST Hildegunst von Mythenmetz of programming

     in reply to

     • pwm
     @pwm @nyanide i'm very sure this is defined behaviour
     pwm likes this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:31:58 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • Hildegunst von Mythenmetz of programming
     • pwm
     @condret @pwm no yeah it's working fine, free tries to free null a few more times in the code i just, mindlessly assumed it did after a failure state was triggered
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:32:09 JST pwm

     in reply to

     • Hildegunst von Mythenmetz of programming
     @condret @nyanide /shrug I can't say I've done it in recent history but I could see the argument for it being defined as a no-op
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:32:36 JST pwm

     in reply to

     • Hildegunst von Mythenmetz of programming
     @nyanide @condret you know what they say about assuming (and not using a debugger you freak)
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: likes this.
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:33:06 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • Hildegunst von Mythenmetz of programming
     • pwm
     @pwm @condret gdb has been open for like 15 minutes lmfao
   • Embed this notice
     nyanide :nyancat_rainbow::nyancat_body::nyancat_face: (nyanide@lab.nyanide.com)'s status on Saturday, 03-May-2025 14:33:38 JST nyanide :nyancat_rainbow::nyancat_body::nyancat_face:

     in reply to

     • Hildegunst von Mythenmetz of programming
     • pwm
     @pwm @condret add an extra 10 min to that i have so much damn brainfog and i can hardly keep track of time rn
   • Embed this notice
     Hildegunst von Mythenmetz of programming (condret@shitposter.world)'s status on Saturday, 03-May-2025 14:34:59 JST Hildegunst von Mythenmetz of programming

     in reply to

     • pwm
     @pwm @nyanide yes, it is
     
     "The free() function frees the memory space pointed to by ptr, which must have been returned by a previous call to malloc(), calloc() or realloc(). Otherwise, or if free(ptr) has already been called before, undefined behavior occurs. If ptr is NULL, no operation is performed."
     
     https://linux.die.net/man/3/free
     pwm likes this.
   • Embed this notice
     Hildegunst von Mythenmetz of programming (condret@shitposter.world)'s status on Saturday, 03-May-2025 14:36:07 JST Hildegunst von Mythenmetz of programming

     in reply to

     • pwm
     @nyanide @pwm use r2, the commands are much shorter than in gdb, also asm syntax of r2 is more readable than atnt
     pwm likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:36:32 JST pwm

     in reply to

     • Hildegunst von Mythenmetz of programming
     @condret @nyanide I for one HATE at&t
     I learned on Intel and it is so much better.
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:36:42 JST gentoobro

     in reply to

     • pwm

     You could override free with your own allocator that makes freeing null run the syscalls to wipe out the TLB cache. Because reasons.

     pwm likes this.
   • Embed this notice
     Hildegunst von Mythenmetz of programming (condret@shitposter.world)'s status on Saturday, 03-May-2025 14:41:07 JST Hildegunst von Mythenmetz of programming

     in reply to

     • pwm
     @pwm @nyanide intel syntax is objectivly better than atnt, however it is bloated. why write
     mov eax, dwordptr [ebx]
     if you could instead just write
     mov eax, [ebx]
     ?
     pwm likes this.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:43:47 JST pwm

     in reply to

     • Hildegunst von Mythenmetz of programming
     @condret @nyanide I've always been a nasm guy, which is smarter about that in its language.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:44:59 JST pwm

     in reply to

     • Hildegunst von Mythenmetz of programming
     • pwm
     @condret @nyanide well, more terse.
   • Embed this notice
     pwm (pwm@darkdork.dev)'s status on Saturday, 03-May-2025 14:45:34 JST pwm

     in reply to

     • þernia
     • gentoobro
     @pernia @nyanide @gentoobro > bro is scared by big letters
     Zoomers are COOKED chat
   • Embed this notice
     þernia (pernia@cum.salon)'s status on Saturday, 03-May-2025 14:45:36 JST þernia

     in reply to

     • gentoobro
     • pwm
     @gentoobro @pwm @nyanide 70% of ur ENTIRE WORLD is FAKE. I cant live with that.
     
     Also the capital letters r unsettling
   • Embed this notice
     þernia (pernia@cum.salon)'s status on Saturday, 03-May-2025 14:45:37 JST þernia

     in reply to

     • gentoobro
     • pwm
     @gentoobro @pwm @nyanide that sounds like hell
   • Embed this notice
     gentoobro (gentoobro@shitpost.cloud)'s status on Saturday, 03-May-2025 14:45:37 JST gentoobro

     in reply to

     • þernia
     • pwm

     This is about 70% macros. Much more readable than the alternative.