From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Wed, 19 May 2021 22:50:43 +0000 (-0500)
Subject: Pass empty vector when constructing re empty, fixes rewrite (#6576)
X-Git-Tag: cvc5-1.0.0~1731
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cc0fa2849b96d228bb5ab43d0497a7b077a00099;p=cvc5.git

Pass empty vector when constructing re empty, fixes rewrite (#6576)

Fixes #6567.
---

diff --git a/src/theory/strings/sequences_rewriter.cpp b/src/theory/strings/sequences_rewriter.cpp
index e827e87d3..bc77a9bc5 100644
--- a/src/theory/strings/sequences_rewriter.cpp
+++ b/src/theory/strings/sequences_rewriter.cpp
@@ -1151,7 +1151,8 @@ Node SequencesRewriter::rewriteRangeRegExp(TNode node)
   if (ch[0] > ch[1])
   {
     // re.range( "B", "A" ) ---> re.none
-    Node retNode = nm->mkNode(REGEXP_EMPTY, {});
+    std::vector<Node> emptyVec;
+    Node retNode = nm->mkNode(REGEXP_EMPTY, emptyVec);
     return returnRewrite(node, retNode, Rewrite::RE_RANGE_EMPTY);
   }
   return node;
diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt
index 1478ae072..fe034c519 100644
--- a/test/regress/CMakeLists.txt
+++ b/test/regress/CMakeLists.txt
@@ -2086,6 +2086,7 @@ set(regress_1_tests
   regress1/strings/issue6270.smt2
   regress1/strings/issue6271-rnf.smt2
   regress1/strings/issue6271-2-rnf.smt2
+  regress1/strings/issue6567-empty-re-range.smt2
   regress1/strings/kaluza-fl.smt2
   regress1/strings/loop002.smt2
   regress1/strings/loop003.smt2
diff --git a/test/regress/regress1/strings/issue6567-empty-re-range.smt2 b/test/regress/regress1/strings/issue6567-empty-re-range.smt2
new file mode 100644
index 000000000..abf2fd294
--- /dev/null
+++ b/test/regress/regress1/strings/issue6567-empty-re-range.smt2
@@ -0,0 +1,4 @@
+(set-logic ALL)
+(set-info :status sat)
+(assert (str.in_re "" (re.* (re.range "b" "a"))))
+(check-sat)