Invalid float cast

Overview

Use this check to detect out-of-range casts to, from, or between floating-point types. Invalid casts have undefined behavior, and typically yield arbitrary values. These values may differ from platform to platform. Available in Xcode 9 and later.

Invalid assignment of a double to a float in C

The cast from n to m results in undefined behavior because the destination type can’t represent its value.

double n = 10e50;
float m = (float)n; // Error: 10e50 can't be represented as a float.

Solution

Use a different destination type or avoid the cast altogether.

See Also

Undefined Behavior Sanitizer

• Misaligned pointer
• Invalid Boolean value
• Out-of-bounds array access
• Invalid enumeration value
• Reaching of unreachable point
• Dynamic type violation
• Division by zero
• Nonnull argument violation
• Nonnull return value violation
• Nonnull variable assignment violation
• Null reference creation and null pointer dereference
• Invalid object size
• Invalid shift
• Integer overflow
• Invalid variable-length array