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Diffstat (limited to 'base/src/main/java/bjc/utils/math/DualExprParser.java')
-rw-r--r--base/src/main/java/bjc/utils/math/DualExprParser.java1
1 files changed, 1 insertions, 0 deletions
diff --git a/base/src/main/java/bjc/utils/math/DualExprParser.java b/base/src/main/java/bjc/utils/math/DualExprParser.java
index f130a9a..624a876 100644
--- a/base/src/main/java/bjc/utils/math/DualExprParser.java
+++ b/base/src/main/java/bjc/utils/math/DualExprParser.java
@@ -75,6 +75,7 @@ public class DualExprParser {
Result res = new Result();
if (preVars == null) {
+ res.varMap = new HashMap<>();
} else {
res.varMap = preVars;
}