diff mercurial/error.py @ 30573:b0ebab239f90

error: add ProgrammingError

We have requirement to express "this is clearly an error caused by the
programmer". The code base uses RuntimeError for that in some places, not
ideal. So let's add a formal exception for that.

--- a/mercurial/error.py	Mon Dec 05 21:36:35 2016 +0000
+++ b/mercurial/error.py	Tue Dec 06 14:57:47 2016 +0000
@@ -168,6 +168,9 @@
 class PushRaced(RuntimeError):
     """An exception raised during unbundling that indicate a push race"""
 
+class ProgrammingError(RuntimeError):
+    """Raised if a developer has made some mistake"""
+
 # bundle2 related errors
 class BundleValueError(ValueError):
     """error raised when bundle2 cannot be processed"""