allow adding a deprecation object

src/core/Env.js

@@ -200,11 +200,11 @@ getJasmineRequireObj().Env = function(j$) {
       handlingLoadErrors = false;
     };
 
-    this.deprecated = function(msg) {
+    this.deprecated = function(deprecation) {
       var runnable = currentRunnable() || topSuite;
-      runnable.addDeprecationWarning(msg);
-      if(typeof console !== 'undefined' && typeof console.warn !== 'undefined') {
-        console.error('DEPRECATION: ' + msg);
+      runnable.addDeprecationWarning(deprecation);
+      if(typeof console !== 'undefined' && typeof console.error === 'function') {
+        console.error('DEPRECATION:', deprecation);
       }
     };
 

src/core/ExpectationResult.js

@@ -45,10 +45,14 @@ getJasmineRequireObj().buildExpectationResult = function() {
 
       var error = options.error;
       if (!error) {
-        try {
-          throw new Error(message());
-        } catch (e) {
-          error = e;
+        if (options.stack) {
+          error = options;
+        } else {
+          try {
+            throw new Error(message());
+          } catch (e) {
+            error = e;
+          }
         }
       }
       return stackFormatter(error);

src/core/Spec.js

@@ -152,8 +152,11 @@ getJasmineRequireObj().Spec = function(j$) {
     return this.getSpecName(this);
   };
 
-  Spec.prototype.addDeprecationWarning = function(msg) {
-    this.result.deprecationWarnings.push(this.expectationResultFactory({ message: msg }));
+  Spec.prototype.addDeprecationWarning = function(deprecation) {
+    if (typeof deprecation === 'string') {
+      deprecation = { message: deprecation };
+    }
+    this.result.deprecationWarnings.push(this.expectationResultFactory(deprecation));
   };
 
   var extractCustomPendingMessage = function(e) {

src/core/Suite.js

@@ -148,8 +148,11 @@ getJasmineRequireObj().Suite = function(j$) {
     }
   };
 
-  Suite.prototype.addDeprecationWarning = function(msg) {
-    this.result.deprecationWarnings.push(this.expectationResultFactory({ message: msg }));
+  Suite.prototype.addDeprecationWarning = function(deprecation) {
+    if (typeof deprecation === 'string') {
+      deprecation = { message: deprecation };
+    }
+    this.result.deprecationWarnings.push(this.expectationResultFactory(deprecation));
   };
 
   function isFailure(args) {