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New posts in undefined-behavior
Preincrement vs postincrement in terms of sequence points
Dec 10, 2025
c++
c++14
language-lawyer
increment
undefined-behavior
Function argument evaluation and side effects
Dec 11, 2025
c++
c++17
language-lawyer
undefined-behavior
side-effects
Is it really well defined to check pointer alignment using the pointer's integer value?
Dec 11, 2025
c++
pointers
c++17
language-lawyer
undefined-behavior
What does the C++ standard says for algorithms when first <= last is not fulfilled?
Dec 09, 2025
c++
algorithm
language-lawyer
undefined-behavior
std
Why does this std::weak_ptr apparently prevent freeing memory, and how can I detect this bug?
Dec 10, 2025
c++
valgrind
undefined-behavior
address-sanitizer
weak-ptr
Can I assign a callable to a std::function with a different return type?
Dec 09, 2025
c++
undefined-behavior
std-function
Is it OK to pass the address of an int for scanf("%x", ...)?
Dec 08, 2025
c
scanf
language-lawyer
undefined-behavior
Is bitwise aritmetic on pointers defined behavior?
Dec 07, 2025
c
pointers
undefined-behavior
null-pointer
Array-pointer arithmetic - legal and undefined behaviour [closed]
Dec 08, 2025
c++
c
arrays
pointers
undefined-behavior
"Cannot read property of '<propName>' of undefined" even though it's defined
Dec 06, 2025
javascript
node.js
undefined-behavior
Defining "reduce" on a list in scheme
Dec 06, 2025
recursion
scheme
undefined-behavior
fold
operation
Is sum+++i undefined behavior in C? [duplicate]
Dec 07, 2025
c
language-lawyer
undefined-behavior
Is it UB to skip the destructor of a derived class before doing a placement new on a base class?
Dec 07, 2025
c++
undefined-behavior
lifetime
[] precedence over * operator
Dec 06, 2025
c
undefined-behavior
Implementation of std::start_lifetime_as()
Dec 06, 2025
c++
undefined-behavior
lifetime
strict-aliasing
c++23
AppBarLayout strange behavior when changing visibility of some views in it
Dec 04, 2025
android
undefined-behavior
android-coordinatorlayout
android-appbarlayout
C language alphanumeric check for bad chars
Dec 03, 2025
c
char
clang
undefined-behavior
Is foo(i++) + foo(i++) undefined in ANSI C?
Dec 01, 2025
c
undefined-behavior
sequence-points
"Materializing" an object of a known type for C++ type inference
Nov 27, 2025
c++
c++11
undefined-behavior
type-inference
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