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New posts in undefined-behavior
Indirectly calling non-const function on a const object
Apr 25, 2026
c++
function
constants
undefined-behavior
Is computing a pointer to uninitialized memory undefined behavior in C?
Apr 22, 2026
c
pointers
undefined-behavior
pointer-arithmetic
Calling C function which takes no parameters with parameters
Apr 21, 2026
c
32bit-64bit
stack-trace
undefined-behavior
calling-convention
Is left shifting unsigned int more than its bit field width, but less than its type size undefined?
Apr 21, 2026
c
undefined-behavior
bit-shift
bit-fields
integer-promotion
Bitwise operations act outside of type width in C; Compiler Bug or Within Spec?
Apr 21, 2026
c
linux
gcc
bitwise-operators
undefined-behavior
Undefined behavior allowed in constexpr -- compiler bug?
Apr 19, 2026
c++
undefined-behavior
constexpr
C++ pointer weird undefined behaviour
Apr 17, 2026
c++
pointers
undefined-behavior
What sequence of operations could possibly have `int i = 1; f(i++, i);` invoke `f(2, 2)`?
Apr 15, 2026
c++
c++17
undefined-behavior
sequence-points
Undefined behaviour or not undefined behaviour
Apr 15, 2026
c
language-lawyer
undefined-behavior
Is accessing static class member via unitilialized pointer UB?
Apr 14, 2026
c++
static
language-lawyer
undefined-behavior
Debug vs Release behavior mystery in VC++ 6.0
Apr 13, 2026
c++
visual-c++
undefined-behavior
Confused by undefined C++ shift operator behavior and wrapping "pattern space"
Apr 11, 2026
c++
undefined-behavior
bit-shift
In the C++ standard, paragraph 6.7.3.5, what does "depends on the side effects" mean?
Apr 10, 2026
c++
language-lawyer
undefined-behavior
lifetime
iso
What is the fastest way to write a IEEE-754 compliant double/float division in C++?
Apr 09, 2026
c++
division
undefined-behavior
ieee-754
divide-by-zero
setting pointer to variable declared in local scope in C
Mar 28, 2026
c
language-lawyer
undefined-behavior
lifetime
What is "[core] language undefined behavior" as opposed to "undefined behavior"?
Mar 28, 2026
c++
language-lawyer
c++20
undefined-behavior
c++23
SSIS Multicast Issue: Weird behavior
Mar 26, 2026
ssis
multicast
undefined-behavior
Is `reinterpret_cast` on `this` inside union-like class an undefined behavior?
Mar 24, 2026
c++
undefined-behavior
unions
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