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read_volatile __rust_no_alloc_shim_is_unstable in alloc_zeroed
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@ -171,7 +171,13 @@ pub unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8
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#[inline]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub unsafe fn alloc_zeroed(layout: Layout) -> *mut u8 {
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unsafe { __rust_alloc_zeroed(layout.size(), layout.align()) }
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unsafe {
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// Make sure we don't accidentally allow omitting the allocator shim in
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// stable code until it is actually stabilized.
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core::ptr::read_volatile(&__rust_no_alloc_shim_is_unstable);
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__rust_alloc_zeroed(layout.size(), layout.align())
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}
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}
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#[cfg(not(test))]
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