solidity/test/libsolidity/syntaxTests/controlFlow/storageReturn/while_warn.sol

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contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
while(false) {
c = s;
}
}
}
// ----
// Warning: (87-98): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.