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accept undef in raw pointers, for consistency with integers

This commit is contained in:
Ralf Jung 2018-11-17 14:05:00 +01:00
parent 261faf3ce2
commit fb8b1e3989
1 changed files with 10 additions and 6 deletions
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16
src/librustc_mir/interpret/validity.rs
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@ -312,12 +312,16 @@ impl<'rt, 'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>>
}
}
ty::RawPtr(..) => {
// No undef allowed here. Eventually this should be consistent with
// the integer types.
let _ptr = try_validation!(value.to_scalar_ptr(),
"undefined address in pointer", self.path);
let _meta = try_validation!(value.to_meta(),
"uninitialized data in fat pointer metadata", self.path);
if self.const_mode {
// Integers/floats in CTFE: For consistency with integers, we do not
// accept undef.
let _ptr = try_validation!(value.to_scalar_ptr(),
"undefined address in raw pointer", self.path);
let _meta = try_validation!(value.to_meta(),
"uninitialized data in raw fat pointer metadata", self.path);
} else {
// Remain consistent with `usize`: Accept anything.
}
}
_ if ty.is_box() || ty.is_region_ptr() => {
// Handle fat pointers.