stackalloc inside a loop (CA2014)

Key dotnet.codequality.stackalloc-in-loop · Severity warning · Category codequality

Microsoft analyzer CA2014. Flags stackalloc inside a loop. Stack memory is only released when the method returns, so a long loop overflows the stack.

Incorrect

for (var i = 0; i < rows; i++)
{
    Span<byte> line = stackalloc byte[256];
    Fill(line, i);
}

Correct

Span<byte> line = stackalloc byte[256];
for (var i = 0; i < rows; i++)
{
    line.Clear();
    Fill(line, i);
}