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ompile time dereference of a constant slice was too generous #2821

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This commit is contained in:
Christoffer Lerno
2026-01-24 22:42:04 +01:00
parent ce8167a102
commit 9b2fc04959
4 changed files with 33 additions and 10 deletions
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12
src/compiler/sema_expr.c
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@@ -8921,8 +8921,18 @@ static inline bool sema_expr_analyse_deref(SemaContext *context, Expr *expr, boo
break;
case CONST_BYTES:
case CONST_STRING:
expr_rewrite_const_int(expr, type_get_indexed_type(inner->type), inner->const_expr.bytes.len ? inner->const_expr.bytes.ptr[0] : 0);
{
if (inner->type->type_kind != TYPE_POINTER) break;
Type *inner_type = type_get_indexed_type(inner->type);
if (!type_kind_is_any_integer(type_flatten(inner_type)->type_kind)) break;
if (!inner->const_expr.bytes.len)
{
RETURN_SEMA_ERROR(inner, "You cannot dereference an empty constant array or slice.");
}
expr_rewrite_const_int(expr, inner_type, inner->const_expr.bytes.ptr[0]);
return true;
}
default:
UNREACHABLE
}