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Fix potential crash on large constant ZST slice

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This commit is contained in:
bjorn3 2023-09-26 16:52:08 +00:00
parent ca18301dfe
commit cb55ce11dc
1 changed files with 1 additions and 2 deletions
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3
src/constant.rs
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@ -186,8 +186,7 @@ pub(crate) fn codegen_const_value<'tcx>(
ConstValue::Slice { data, meta } => {
let alloc_id = fx.tcx.reserve_and_set_memory_alloc(data);
let ptr = pointer_for_allocation(fx, alloc_id).get_addr(fx);
// FIXME: the `try_from` here can actually fail, e.g. for very long ZST slices.
let len = fx.bcx.ins().iconst(fx.pointer_type, i64::try_from(meta).unwrap());
let len = fx.bcx.ins().iconst(fx.pointer_type, meta as i64);
CValue::by_val_pair(ptr, len, layout)
}
}