catch duplicate set keys for literals and hash-set calls.

4 files changed, 39 insertions, 4 deletions

diff --git a/src/clj/clojure/core.clj b/src/clj/clojure/core.clj
index b5909407..1508a76c 100644
--- a/src/clj/clojure/core.clj
+++ b/src/clj/clojure/core.clj
@@ -289,7 +289,7 @@
   "Returns a new hash set with supplied keys."
   ([] #{})
   ([& keys]
-   (clojure.lang.PersistentHashSet/create keys)))
+   (clojure.lang.PersistentHashSet/createWithCheck keys)))
 
 (defn sorted-map
   "keyval => key val
@@ -2773,7 +2773,7 @@
 
 (defn set
   "Returns a set of the distinct elements of coll."
-  [coll] (apply hash-set coll))
+  [coll] (clojure.lang.PersistentHashSet/create #^clojure.lang.ISeq (seq coll)))
 
 (defn #^{:private true}
   filter-key [keyfn pred amap]
diff --git a/src/jvm/clojure/lang/LispReader.java b/src/jvm/clojure/lang/LispReader.java
index dc8ce972..137c8a4c 100644
--- a/src/jvm/clojure/lang/LispReader.java
+++ b/src/jvm/clojure/lang/LispReader.java
@@ -1008,7 +1008,7 @@ public static class MapReader extends AFn{
 public static class SetReader extends AFn{
 	public Object invoke(Object reader, Object leftbracket) throws Exception{
 		PushbackReader r = (PushbackReader) reader;
-		return PersistentHashSet.create(readDelimitedList('}', r, true));
+		return PersistentHashSet.createWithCheck(readDelimitedList('}', r, true));
 	}
 
 }
diff --git a/src/jvm/clojure/lang/PersistentHashSet.java b/src/jvm/clojure/lang/PersistentHashSet.java
index eced8663..12170d4b 100644
--- a/src/jvm/clojure/lang/PersistentHashSet.java
+++ b/src/jvm/clojure/lang/PersistentHashSet.java
@@ -47,6 +47,41 @@ static public PersistentHashSet create(ISeq items){
 	return ret;
 }
 
+public static PersistentHashSet createWithCheck(Object... init){
+	PersistentHashSet ret = EMPTY;
+	for(int i = 0; i < init.length; i++)
+		{
+		ret = (PersistentHashSet) ret.cons(init[i]);
+		if(ret.count() != i + 1)
+			throw new IllegalArgumentException("Duplicate key: " + init[i]);
+		}
+	return ret;
+}
+
+public static PersistentHashSet createWithCheck(List init){
+	PersistentHashSet ret = EMPTY;
+	int i=0;
+	for(Object key : init)
+		{
+		ret = (PersistentHashSet) ret.cons(key);
+		if(ret.count() != i + 1)
+			throw new IllegalArgumentException("Duplicate key: " + key);		
+		++i;
+		}
+	return ret;
+}
+
+static public PersistentHashSet createWithCheck(ISeq items){
+	PersistentHashSet ret = EMPTY;
+	for(int i=0; items != null; items = items.next(), ++i)
+		{
+		ret = (PersistentHashSet) ret.cons(items.first());
+		if(ret.count() != i + 1)
+			throw new IllegalArgumentException("Duplicate key: " + items.first());
+		}
+	return ret;
+}
+
 PersistentHashSet(IPersistentMap meta, IPersistentMap impl){
 	super(impl);
 	this._meta = meta;
diff --git a/src/jvm/clojure/lang/RT.java b/src/jvm/clojure/lang/RT.java
index 13afd8fd..58d91a44 100644
--- a/src/jvm/clojure/lang/RT.java
+++ b/src/jvm/clojure/lang/RT.java
@@ -1023,7 +1023,7 @@ static public IPersistentMap map(Object... init){
 }
 
 static public IPersistentSet set(Object... init){
-	return PersistentHashSet.create(init);
+	return PersistentHashSet.createWithCheck(init);
 }
 
 static public IPersistentVector vector(Object... init){