Fix #2515 (manually merge PR #2516)
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 9f6feb7..8f5dfe5 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -620,6 +620,7 @@
 -  Fixed a bug (#33) - Script execution was terminated when an invalid cookie key was encountered.
 -  Fixed a bug (#2681) - ``CI_Security::entity_decode()`` used the `PREG_REPLACE_EVAL` flag, which is deprecated since PHP 5.5.
 -  Fixed a bug (#2691) - nested transactions could end in a deadlock when an error is encountered with *db_debug* set to TRUE.
+-  Fixed a bug (#2515) - ``_exception_handler()`` used to send the 200 "OK" HTTP status code and didn't stop script exection even on fatal errors.
 
 Version 2.1.4
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