Error -> Defect for defects (#13908)

* Error -> Defect for defects

The distinction between Error and Defect is subjective,
context-dependent and somewhat arbitrary, so when looking at an
exception, it's hard to guess what it is - this happens often when
looking at a `raises` list _without_ opening the corresponding
definition and digging through layers of inheritance.

With the help of a little consistency in naming, it's at least possible
to start disentangling the two error types and the standard lib can set
a good example here.

2 files changed, 9 insertions, 9 deletions

diff --git a/tests/async/tasynctry.nim b/tests/async/tasynctry.nim
index a7cb5223d..fa3493616 100644
--- a/tests/async/tasynctry.nim
+++ b/tests/async/tasynctry.nim
@@ -14,7 +14,7 @@ import asyncdispatch, strutils
 
 proc foobar() {.async.} =
   if 5 == 5:
-    raise newException(IndexError, "Test")
+    raise newException(IndexDefect, "Test")
 
 proc catch() {.async.} =
   # TODO: Create a test for when exceptions are not caught.
@@ -25,26 +25,26 @@ proc catch() {.async.} =
 
   try:
     await foobar()
-  except IndexError:
+  except IndexDefect:
     echo("Specific except")
 
   try:
     await foobar()
-  except OSError, FieldError, IndexError:
+  except OSError, FieldDefect, IndexDefect:
     echo("Multiple idents in except")
 
   try:
     await foobar()
-  except OSError, FieldError:
+  except OSError, FieldDefect:
     assert false
-  except IndexError:
+  except IndexDefect:
     echo("Multiple except branches")
 
   try:
     await foobar()
-  except IndexError:
+  except IndexDefect:
     echo("Multiple except branches 2")
-  except OSError, FieldError:
+  except OSError, FieldDefect:
     assert false
 
 waitFor catch()
diff --git a/tests/async/tupcoming_async.nim b/tests/async/tupcoming_async.nim
index da98fc4d8..0b6e53454 100644
--- a/tests/async/tupcoming_async.nim
+++ b/tests/async/tupcoming_async.nim
@@ -45,7 +45,7 @@ when defined(upcoming):
     poll()
 
   proc eventTest5298() =
-    # Event must raise `AssertionError` if event was unregistered twice.
+    # Event must raise `AssertionDefect` if event was unregistered twice.
     # Issue #5298.
     let e = newAsyncEvent()
     var eventReceived = false
@@ -57,7 +57,7 @@ when defined(upcoming):
       poll()
     try:
       e.unregister()
-    except AssertionError:
+    except AssertionDefect:
       discard
     e.close()