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avoid potential null ptr deref (Coverity)

This commit is contained in:
Terence Parr 2013-08-31 16:32:59 -07:00
parent 9420672520
commit 1febc36e15
1 changed files with 3 additions and 1 deletions
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4
tool/src/org/antlr/v4/misc/Graph.java
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@ -97,7 +97,9 @@ public class Graph<T> {
n = tNode; n = tNode;
if ( !visited.contains(n) ) break; if ( !visited.contains(n) ) break;
} }
DFS(n, visited, sorted); if (n!=null) { // if at least one unvisited
DFS(n, visited, sorted);
}
} }
return sorted; return sorted;
} }