Fix bug #47143, bug #51458 - provide more useful info in bad exception cases

NEWS

@@ -9,6 +9,9 @@
     in method. (Scott)
   . Added options to debug backtrace functions. (Stas)
   . Fixed Bug #53629 (memory leak inside highlight_string()). (Hannes, Ilia)
+  . Fixed Bug #51458 (Lack of error context with nested exceptions). (Stas)
+  . Fixed Bug #47143 (Throwing an exception in a destructor causes a fatal error).
+    (Stas)
 
 - Core:
   . Fixed bug #48484 (array_product() always returns 0 for an empty array).

Zend/tests/exception_handler_002.phpt

@@ -20,4 +20,8 @@ echo "Done\n";
 --EXPECTF--	
 string(12) "test thrown!"
 
-Fatal error: Exception thrown without a stack frame in Unknown on line 0
+Fatal error: Uncaught exception 'Exception' in %sexception_handler_002.php:7
+Stack trace:
+#0 [internal function]: foo(Object(test))
+#1 {main}
+  thrown in %sexception_handler_002.php on line %d

Zend/zend_exceptions.c

@@ -91,6 +91,9 @@ void zend_throw_exception_internal(zval *exception TSRMLS_DC) /* {{{ */
 		}
 	}
 	if (!EG(current_execute_data)) {
+		if(EG(exception)) {
+			zend_exception_error(EG(exception), E_ERROR TSRMLS_CC);
+		}
 		zend_error(E_ERROR, "Exception thrown without a stack frame");
 	}