#undefinedbehavior — Public Fediverse posts

“C++26: Reducing Undefined Behaviour”, Sandor Dargo (https://www.sandordargo.com/blog/2026/07/29/cpp26-reduces-undefined-behaviour).

Via Lobsters: https://lobste.rs/s/xinbkz/c_26_reducing_undefined_behaviour

#UndefinedBehavior #CPP #CPlusPlus #Programming #PLDI #Compilers

“C++26: Reducing Undefined Behaviour”, Sandor Dargo (https://www.sandordargo.com/blog/2026/07/29/cpp26-reduces-undefined-behaviour).

Via Lobsters: https://lobste.rs/s/xinbkz/c_26_reducing_undefined_behaviour

#UndefinedBehavior #CPP #CPlusPlus #Programming #PLDI #Compilers

“C++26: Reducing Undefined Behaviour”, Sandor Dargo (https://www.sandordargo.com/blog/2026/07/29/cpp26-reduces-undefined-behaviour).

Via Lobsters: https://lobste.rs/s/xinbkz/c_26_reducing_undefined_behaviour

#UndefinedBehavior #CPP #CPlusPlus #Programming #PLDI #Compilers

“C++26: Reducing Undefined Behaviour”, Sandor Dargo (https://www.sandordargo.com/blog/2026/07/29/cpp26-reduces-undefined-behaviour).

Via Lobsters: https://lobste.rs/s/xinbkz/c_26_reducing_undefined_behaviour

#UndefinedBehavior #CPP #CPlusPlus #Programming #PLDI #Compilers

From the Comp-Cert release notes - sanity in C programming. Someone call ISO and complain.

"Constant propagation: optimize "known integer or undefined" results. For example, &x == &x, which is either 1 or undefined, is now replaced by 1"

#wg14 #Clanguage #undefinedbehavior #software

From the Comp-Cert release notes - sanity in C programming. Someone call ISO and complain.

"Constant propagation: optimize "known integer or undefined" results. For example, &x == &x, which is either 1 or undefined, is now replaced by 1"

#wg14 #Clanguage #undefinedbehavior #software

From the Comp-Cert release notes - sanity in C programming. Someone call ISO and complain.

"Constant propagation: optimize "known integer or undefined" results. For example, &x == &x, which is either 1 or undefined, is now replaced by 1"

#wg14 #Clanguage #undefinedbehavior #software

From the Comp-Cert release notes - sanity in C programming. Someone call ISO and complain.

"Constant propagation: optimize "known integer or undefined" results. For example, &x == &x, which is either 1 or undefined, is now replaced by 1"

#wg14 #Clanguage #undefinedbehavior #software

From the Comp-Cert release notes - sanity in C programming. Someone call ISO and complain.

"Constant propagation: optimize "known integer or undefined" results. For example, &x == &x, which is either 1 or undefined, is now replaced by 1"

#wg14 #Clanguage #undefinedbehavior #software

😥:

“Everything In C Is Undefined Behavior”, Thomas Habets (https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html).

Via HN: https://news.ycombinator.com/item?id=48203698

On Lobsters: https://lobste.rs/s/dtcfd6/everything_c_is_undefined_behavior

#Programming #C #CPP #CPlusPlus #UB #UndefinedBehavior #Standards

😥:

“Everything In C Is Undefined Behavior”, Thomas Habets (https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html).

Via HN: https://news.ycombinator.com/item?id=48203698

On Lobsters: https://lobste.rs/s/dtcfd6/everything_c_is_undefined_behavior

#Programming #C #CPP #CPlusPlus #UB #UndefinedBehavior #Standards

😥:

“Everything In C Is Undefined Behavior”, Thomas Habets (https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html).

Via HN: https://news.ycombinator.com/item?id=48203698

On Lobsters: https://lobste.rs/s/dtcfd6/everything_c_is_undefined_behavior

#Programming #C #CPP #CPlusPlus #UB #UndefinedBehavior #Standards

😥:

“Everything In C Is Undefined Behavior”, Thomas Habets (https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html).

Via HN: https://news.ycombinator.com/item?id=48203698

On Lobsters: https://lobste.rs/s/dtcfd6/everything_c_is_undefined_behavior

#Programming #C #CPP #CPlusPlus #UB #UndefinedBehavior #Standards

Oh, look! Another pretentious C programmer bemoaning the inevitability of undefined behavior like it's some sort of philosophical revelation. 🙄 We're all just helpless marionettes in the grand theater of programming, swirling in a vortex of #pointers and segfaults! 🤹‍♂️
https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html #pretentiousCprogrammer #undefinedBehavior #programmingHumor #segfaults #HackerNews #ngated

Oh, look! Another pretentious C programmer bemoaning the inevitability of undefined behavior like it's some sort of philosophical revelation. 🙄 We're all just helpless marionettes in the grand theater of programming, swirling in a vortex of #pointers and segfaults! 🤹‍♂️
https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html #pretentiousCprogrammer #undefinedBehavior #programmingHumor #segfaults #HackerNews #ngated

Oh, look! Another pretentious C programmer bemoaning the inevitability of undefined behavior like it's some sort of philosophical revelation. 🙄 We're all just helpless marionettes in the grand theater of programming, swirling in a vortex of #pointers and segfaults! 🤹‍♂️
https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html #pretentiousCprogrammer #undefinedBehavior #programmingHumor #segfaults #HackerNews #ngated

Oh, look! Another pretentious C programmer bemoaning the inevitability of undefined behavior like it's some sort of philosophical revelation. 🙄 We're all just helpless marionettes in the grand theater of programming, swirling in a vortex of #pointers and segfaults! 🤹‍♂️
https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html #pretentiousCprogrammer #undefinedBehavior #programmingHumor #segfaults #HackerNews #ngated

Oh, look! Another pretentious C programmer bemoaning the inevitability of undefined behavior like it's some sort of philosophical revelation. 🙄 We're all just helpless marionettes in the grand theater of programming, swirling in a vortex of #pointers and segfaults! 🤹‍♂️
https://blog.habets.se/2026/05/Everything-in-C-is-undefined-behavior.html #pretentiousCprogrammer #undefinedBehavior #programmingHumor #segfaults #HackerNews #ngated

Today is the perfect day to listen to some #undefinedbehavior #psytrance #music

ht @buherator

https://soundcloud.com/burninnoise/undefined-behavior-vs-altruism-perception-box

Today is the perfect day to listen to some #undefinedbehavior #psytrance #music

ht @buherator

https://soundcloud.com/burninnoise/undefined-behavior-vs-altruism-perception-box

Today is the perfect day to listen to some #undefinedbehavior #psytrance #music

ht @buherator

https://soundcloud.com/burninnoise/undefined-behavior-vs-altruism-perception-box

Today is the perfect day to listen to some #undefinedbehavior #psytrance #music

ht @buherator

https://soundcloud.com/burninnoise/undefined-behavior-vs-altruism-perception-box

Today is the perfect day to listen to some #undefinedbehavior #psytrance #music

ht @buherator

https://soundcloud.com/burninnoise/undefined-behavior-vs-altruism-perception-box

The production bug that made me care about undefined behavior

https://gaultier.github.io/blog/the_production_bug_that_made_me_care_about_undefined_behavior.html

#HackerNews #productionbug #undefinedbehavior #programmingcare #techstories #softwaredevelopment

The production bug that made me care about undefined behavior

https://gaultier.github.io/blog/the_production_bug_that_made_me_care_about_undefined_behavior.html

#HackerNews #productionbug #undefinedbehavior #programmingcare #techstories #softwaredevelopment

The production bug that made me care about undefined behavior

https://gaultier.github.io/blog/the_production_bug_that_made_me_care_about_undefined_behavior.html

#HackerNews #productionbug #undefinedbehavior #programmingcare #techstories #softwaredevelopment

The production bug that made me care about undefined behavior

https://gaultier.github.io/blog/the_production_bug_that_made_me_care_about_undefined_behavior.html

#HackerNews #productionbug #undefinedbehavior #programmingcare #techstories #softwaredevelopment

The production bug that made me care about undefined behavior

https://gaultier.github.io/blog/the_production_bug_that_made_me_care_about_undefined_behavior.html

#HackerNews #productionbug #undefinedbehavior #programmingcare #techstories #softwaredevelopment

"Behold, the epic quest for 'Dependable C' - because nothing screams #reliability like undefined behavior and broken VLAs 🤦‍♂️! In a dazzling display of verbosity, they ironically try to fix C with more convoluted #C23 and mythical #C2Y, because adding chaos is the path to safety, right? 🤔🔧"
https://dependablec.org/ #DependableC #UndefinedBehavior #SoftwareDevelopment #HackerNews #ngated

"Behold, the epic quest for 'Dependable C' - because nothing screams #reliability like undefined behavior and broken VLAs 🤦‍♂️! In a dazzling display of verbosity, they ironically try to fix C with more convoluted #C23 and mythical #C2Y, because adding chaos is the path to safety, right? 🤔🔧"
https://dependablec.org/ #DependableC #UndefinedBehavior #SoftwareDevelopment #HackerNews #ngated

"Behold, the epic quest for 'Dependable C' - because nothing screams #reliability like undefined behavior and broken VLAs 🤦‍♂️! In a dazzling display of verbosity, they ironically try to fix C with more convoluted #C23 and mythical #C2Y, because adding chaos is the path to safety, right? 🤔🔧"
https://dependablec.org/ #DependableC #UndefinedBehavior #SoftwareDevelopment #HackerNews #ngated

"Behold, the epic quest for 'Dependable C' - because nothing screams #reliability like undefined behavior and broken VLAs 🤦‍♂️! In a dazzling display of verbosity, they ironically try to fix C with more convoluted #C23 and mythical #C2Y, because adding chaos is the path to safety, right? 🤔🔧"
https://dependablec.org/ #DependableC #UndefinedBehavior #SoftwareDevelopment #HackerNews #ngated

Nice 👌🏽👇🏽:

“Undefined Behavior In C And C++” [2024], Russell Wallace (https://russellw.github.io/undefined-behavior).

Via HN: https://news.ycombinator.com/item?id=44841891

#UndefinedBehavior #Programming #C #CPP #Compilers #Optimization #Standards #UB

Nice 👌🏽👇🏽:

“Undefined Behavior In C And C++” [2024], Russell Wallace (https://russellw.github.io/undefined-behavior).

Via HN: https://news.ycombinator.com/item?id=44841891

#UndefinedBehavior #Programming #C #CPP #Compilers #Optimization #Standards #UB

Nice 👌🏽👇🏽:

“Undefined Behavior In C And C++” [2024], Russell Wallace (https://russellw.github.io/undefined-behavior).

Via HN: https://news.ycombinator.com/item?id=44841891

#UndefinedBehavior #Programming #C #CPP #Compilers #Optimization #Standards #UB

Nice 👌🏽👇🏽:

“Undefined Behavior In C And C++” [2024], Russell Wallace (https://russellw.github.io/undefined-behavior).

Via HN: https://news.ycombinator.com/item?id=44841891

#UndefinedBehavior #Programming #C #CPP #Compilers #Optimization #Standards #UB

Nice 👌🏽👇🏽:

“Undefined Behavior In C And C++” [2024], Russell Wallace (https://russellw.github.io/undefined-behavior).

Via HN: https://news.ycombinator.com/item?id=44841891

#UndefinedBehavior #Programming #C #CPP #Compilers #Optimization #Standards #UB

🚀😂 Oh, look! Another grandiose plan to sprinkle some #Rust magic on #C, only to be abandoned faster than you can say "undefined behavior". But hey, at least the proposal taught us that gluing #safety onto C is like trying to attach wings to a car and expecting it to fly 🚗✈️.
https://sibellavia.lol/posts/2025/09/safe-c-proposal-is-not-being-continued/ #Crossover #RustMagic #UndefinedBehavior #CodingHumor #HackerNews #ngated

🚀😂 Oh, look! Another grandiose plan to sprinkle some #Rust magic on #C, only to be abandoned faster than you can say "undefined behavior". But hey, at least the proposal taught us that gluing #safety onto C is like trying to attach wings to a car and expecting it to fly 🚗✈️.
https://sibellavia.lol/posts/2025/09/safe-c-proposal-is-not-being-continued/ #Crossover #RustMagic #UndefinedBehavior #CodingHumor #HackerNews #ngated

🚀😂 Oh, look! Another grandiose plan to sprinkle some #Rust magic on #C, only to be abandoned faster than you can say "undefined behavior". But hey, at least the proposal taught us that gluing #safety onto C is like trying to attach wings to a car and expecting it to fly 🚗✈️.
https://sibellavia.lol/posts/2025/09/safe-c-proposal-is-not-being-continued/ #Crossover #RustMagic #UndefinedBehavior #CodingHumor #HackerNews #ngated

🚀😂 Oh, look! Another grandiose plan to sprinkle some #Rust magic on #C, only to be abandoned faster than you can say "undefined behavior". But hey, at least the proposal taught us that gluing #safety onto C is like trying to attach wings to a car and expecting it to fly 🚗✈️.
https://sibellavia.lol/posts/2025/09/safe-c-proposal-is-not-being-continued/ #Crossover #RustMagic #UndefinedBehavior #CodingHumor #HackerNews #ngated

@wyatt I've seen others interpret it as rav1d offering a $20,000 bug bounty for dav1d, the C decoder. If you find exploitable undefined behavior that the dav1d devs have to spend 5% of CPU time to prevent, you win.

#rav1d #dav1d #av1 #BugBounty #UndefinedBehavior #riir #rustlang

@wyatt I've seen others interpret it as rav1d offering a $20,000 bug bounty for dav1d, the C decoder. If you find exploitable undefined behavior that the dav1d devs have to spend 5% of CPU time to prevent, you win.

#rav1d #dav1d #av1 #BugBounty #UndefinedBehavior #riir #rustlang

@wyatt I've seen others interpret it as rav1d offering a $20,000 bug bounty for dav1d, the C decoder. If you find exploitable undefined behavior that the dav1d devs have to spend 5% of CPU time to prevent, you win.

#rav1d #dav1d #av1 #BugBounty #UndefinedBehavior #riir #rustlang

@wyatt I've seen others interpret it as rav1d offering a $20,000 bug bounty for dav1d, the C decoder. If you find exploitable undefined behavior that the dav1d devs have to spend 5% of CPU time to prevent, you win.

#rav1d #dav1d #av1 #BugBounty #UndefinedBehavior #riir #rustlang

@wyatt I've seen others interpret it as rav1d offering a $20,000 bug bounty for dav1d, the C decoder. If you find exploitable undefined behavior that the dav1d devs have to spend 5% of CPU time to prevent, you win.

#rav1d #dav1d #av1 #BugBounty #UndefinedBehavior #riir #rustlang

“[…] But they also made some mistakes… which is not too surprising when you are doing this kind of work. And I would like rust ideally not to repeat these mistakes. I think we can make our own new and fun unique mistakes”
Ralf Jung on the MiniRust language specification proposal
#rustlang #formalLanguage #undefinedBehavior
https://www.youtube.com/watch?v=UKCUZtr378s&t=5h13m00s

“[…] But they also made some mistakes… which is not too surprising when you are doing this kind of work. And I would like rust ideally not to repeat these mistakes. I think we can make our own new and fun unique mistakes”
Ralf Jung on the MiniRust language specification proposal
#rustlang #formalLanguage #undefinedBehavior
https://www.youtube.com/watch?v=UKCUZtr378s&t=5h13m00s

“[…] But they also made some mistakes… which is not too surprising when you are doing this kind of work. And I would like rust ideally not to repeat these mistakes. I think we can make our own new and fun unique mistakes”
Ralf Jung on the MiniRust language specification proposal
#rustlang #formalLanguage #undefinedBehavior
https://www.youtube.com/watch?v=UKCUZtr378s&t=5h13m00s

Ah yes, because what could be more exhilarating than "fun" with undefined behavior and C libraries? 🤔 Just when you thought C couldn't get any more "entertaining," here comes a blog post to remind you that the real circus is in the code you *didn't* know was breaking things. 🎪🔧
https://keithp.com/blogs/sanitizer-fun/ #CProgramming #UndefinedBehavior #FunWithCode #CodeCircus #TechHumor #HackerNews #ngated

Ah yes, because what could be more exhilarating than "fun" with undefined behavior and C libraries? 🤔 Just when you thought C couldn't get any more "entertaining," here comes a blog post to remind you that the real circus is in the code you *didn't* know was breaking things. 🎪🔧
https://keithp.com/blogs/sanitizer-fun/ #CProgramming #UndefinedBehavior #FunWithCode #CodeCircus #TechHumor #HackerNews #ngated

Ah yes, because what could be more exhilarating than "fun" with undefined behavior and C libraries? 🤔 Just when you thought C couldn't get any more "entertaining," here comes a blog post to remind you that the real circus is in the code you *didn't* know was breaking things. 🎪🔧
https://keithp.com/blogs/sanitizer-fun/ #CProgramming #UndefinedBehavior #FunWithCode #CodeCircus #TechHumor #HackerNews #ngated

Ah yes, because what could be more exhilarating than "fun" with undefined behavior and C libraries? 🤔 Just when you thought C couldn't get any more "entertaining," here comes a blog post to remind you that the real circus is in the code you *didn't* know was breaking things. 🎪🔧
https://keithp.com/blogs/sanitizer-fun/ #CProgramming #UndefinedBehavior #FunWithCode #CodeCircus #TechHumor #HackerNews #ngated

I put an overview of my preliminary (!) analysis of undefined behavior in the core language and the status in C2Y into the ISO WG14 document log.
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3529.pdf
#undefinedbehavior #clanguage

I put an overview of my preliminary (!) analysis of undefined behavior in the core language and the status in C2Y into the ISO WG14 document log.
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3529.pdf
#undefinedbehavior #clanguage

I put an overview of my preliminary (!) analysis of undefined behavior in the core language and the status in C2Y into the ISO WG14 document log.
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3529.pdf
#undefinedbehavior #clanguage

I put an overview of my preliminary (!) analysis of undefined behavior in the core language and the status in C2Y into the ISO WG14 document log.
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3529.pdf
#undefinedbehavior #clanguage

I put an overview of my preliminary (!) analysis of undefined behavior in the core language and the status in C2Y into the ISO WG14 document log.
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3529.pdf
#undefinedbehavior #clanguage

Ah, yes, let's all gather 'round the campfire to hear the age-old tale of #C and #C++, where speed demons rule and correctness is just a bedtime story 🙄🚀. Apparently, back in 1989, the wizards of #programming thought "undefined behavior" sounded like a great idea—because who doesn't love a little #chaos in their code? 😜🤯 #YOLOCoding #UndefinedIsTheNewDefined
https://research.swtch.com/ub #UndefinedBehavior #Coding #HackerNews #ngated

Ah, yes, let's all gather 'round the campfire to hear the age-old tale of #C and #C++, where speed demons rule and correctness is just a bedtime story 🙄🚀. Apparently, back in 1989, the wizards of #programming thought "undefined behavior" sounded like a great idea—because who doesn't love a little #chaos in their code? 😜🤯 #YOLOCoding #UndefinedIsTheNewDefined
https://research.swtch.com/ub #UndefinedBehavior #Coding #HackerNews #ngated