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Do not dereference and write through a null pointer during loop invariant removal.

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This commit is contained in:
Stephen Heumann
2019-12-22 19:58:57 -06:00
parent 095060ca70
commit 2fb075ce58
1 changed files with 2 additions and 1 deletions
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DAG.pas
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@@ -3255,6 +3255,7 @@ var
new(dp); new(dp);
dp^.last := nil; dp^.last := nil;
dp^.next := dom; dp^.next := dom;
if dom <> nil then
dom^.last := dp; dom^.last := dp;
dom := dp; dom := dp;
dp^.dfn := dfn; dp^.dfn := dfn;