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fix #1583

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-04-23 07:15:04 +02:00
parent 279f1986a6
commit 0b4e54be38
1 changed files with 3 additions and 0 deletions
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3
src/ast/rewriter/seq_rewriter.cpp
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@ -367,6 +367,9 @@ br_status seq_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
SASSERT(num_args == 2);
return mk_re_concat(args[0], args[1], result);
case OP_RE_UNION:
if (num_args == 1) {
result = args[0]; return BR_DONE;
}
SASSERT(num_args == 2);
return mk_re_union(args[0], args[1], result);
case OP_RE_RANGE: