36 lines
1.2 KiB
Rust
36 lines
1.2 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// error-pattern:index out of bounds
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use std::mem;
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fn main() {
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// This should cause a bounds-check panic, but may not if we do our
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// bounds checking by comparing the scaled index to the vector's
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// address-bounds, since we've scaled the index to wrap around to the
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// address of the 0th cell in the array (even though the index is
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// huge).
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let x = vec!(1_usize,2_usize,3_usize);
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let base = x.as_ptr() as usize;
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let idx = base / mem::size_of::<usize>();
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println!("ov1 base = 0x{:x}", base);
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println!("ov1 idx = 0x{:x}", idx);
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println!("ov1 sizeof::<usize>() = 0x{:x}", mem::size_of::<usize>());
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println!("ov1 idx * sizeof::<usize>() = 0x{:x}",
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idx * mem::size_of::<usize>());
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// This should panic.
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println!("ov1 0x{:x}", x[idx]);
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}
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