Hacker News with Generative AI: Undefined Behavior

A Guide to Undefined Behavior in C and C++ (2010) (regehr.org)
Programming languages typically make a distinction between normal program actions and erroneous actions. For Turing-complete languages we cannot reliably decide offline whether a program has the potential to execute an error; we have to just run it and see.

C, C++, Programming Languages, Software Development, Undefined Behavior

79 points by GarethX 21 days ago | 64 comments

Clang now more aggressively uses undefined behavior on pointer addition overflow (github.com/llvm)
Clang will now more aggressively use undefined behavior on pointer addition overflow for optimization purposes.

Programming, Compilers, Optimization, Software, Undefined Behavior

4 points by remexre 72 days ago | 1 comments

First hand account of "The Undefined Behaviour Question" [pdf] (tomazos.com)

Programming, Software Development, Computer Science, Undefined Behavior

15 points by chris_wot 127 days ago | 1 comments

The limits of time travel in the face of undefined behavior in C (microsoft.com)
Some time ago, I noted that undefined behavior can result in time travel. Specifically, that once undefined behavior occurs, the undefined behavior extends to the entire program, even the parts that executed before the undefined behavior occurred.

Programming, C, Undefined Behavior, Time Travel

5 points by ingve 148 days ago | 0 comments

C++ programmer′s guide to undefined behavior: part 8 of 11 (pvs-studio.com)
Your attention is invited to the eighth part of an e-book on undefined behavior. This is not a textbook, as it's intended for those who are already familiar with C++ programming. It's a kind of C++ programmer's guide to undefined behavior and to its most secret and exotic corners. The book was written by Dmitry Sviridkin and edited by Andrey Karpov.

C++, Programming, Undefined Behavior, Software Development, E-Books

5 points by todsacerdoti 152 days ago | 0 comments

C++: Uncompromised Performance, Undefined Behavior, & Move Semantics [video] (youtube.com)

C++, Programming Languages, Performance, Undefined Behavior, Move Semantics

11 points by coffeeaddict1 163 days ago | 1 comments

Undefined behavior in C is a reading error (2021) (yodaiken.com)

Programming, C Programming, Undefined Behavior

25 points by nequo 213 days ago | 67 comments

The difference between undefined behavior and ill-formed C++ programs (microsoft.com)

C++, Programming Languages, Undefined Behavior, Compiler Errors

41 points by st_goliath 242 days ago | 21 comments