Report JS errors in debug console

Reviewed By: javache

Differential Revision: D4835405

fbshipit-source-id: d10658d1b885048ea3495388450208bb0e29ee5b

React/Base/RCTJSStackFrame.m

@@ -8,6 +8,7 @@
  */
 
 #import "RCTJSStackFrame.h"
+
 #import "RCTLog.h"
 #import "RCTUtils.h"
 
@@ -98,4 +99,14 @@ static NSRegularExpression *RCTJSStackFrameRegex()
   return stack;
 }
 
+- (NSString *)description {
+  return [NSString stringWithFormat:@"<%@: %p method name: %@; file name: %@; line: %ld; column: %ld>",
+          self.class,
+          self,
+          self.methodName,
+          self.file,
+          (long)self.lineNumber,
+          (long)self.column];
+}
+
 @end