diff options
Diffstat (limited to 'chapter14/src/main/java/com')
| -rw-r--r-- | chapter14/src/main/java/com/seaofnodes/simple/node/MinusNode.java | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/chapter14/src/main/java/com/seaofnodes/simple/node/MinusNode.java b/chapter14/src/main/java/com/seaofnodes/simple/node/MinusNode.java index 8a2c9406..8ba45d26 100644 --- a/chapter14/src/main/java/com/seaofnodes/simple/node/MinusNode.java +++ b/chapter14/src/main/java/com/seaofnodes/simple/node/MinusNode.java @@ -22,7 +22,9 @@ public class MinusNode extends Node { public Type compute() { if( in(1)._type instanceof TypeInteger i0 ) { if( i0.isHigh() ) return TypeInteger.TOP; - return i0==TypeInteger.BOT ? TypeInteger.BOT : TypeInteger.make(-i0._max,-i0._min); + // Catch overflow wrapping on `-Long.MIN_VALUE` + if( i0 == TypeInteger.BOT || i0._min == Long.MIN_VALUE ) return TypeInteger.BOT; + return TypeInteger.make(-i0._max,-i0._min); } return TypeInteger.TOP.meet(in(1)._type); } |