diff -r 7970895a21cb -r 37a41267d000 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Tue Sep 21 18:18:56 2021 +0200
+++ b/mercurial/scmutil.py	Tue Sep 28 09:40:57 2021 +0200
@@ -689,7 +689,7 @@
 
     l = revrange(repo, [revspec], localalias=localalias)
     if not l:
-        raise error.Abort(_(b'empty revision set'))
+        raise error.InputError(_(b'empty revision set'))
     return repo[l.last()]
 
 
@@ -710,7 +710,7 @@
     l = revrange(repo, revs)
 
     if not l:
-        raise error.Abort(_(b'empty revision range'))
+        raise error.InputError(_(b'empty revision range'))
 
     first = l.first()
     second = l.last()
@@ -720,7 +720,7 @@
         and len(revs) >= 2
         and not all(revrange(repo, [r]) for r in revs)
     ):
-        raise error.Abort(_(b'empty revision on one side of range'))
+        raise error.InputError(_(b'empty revision on one side of range'))
 
     # if top-level is range expression, the result must always be a pair
     if first == second and len(revs) == 1 and not _pairspec(revs[0]):
@@ -1211,9 +1211,9 @@
     try:
         similarity = float(opts.get(b'similarity') or 0)
     except ValueError:
-        raise error.Abort(_(b'similarity must be a number'))
+        raise error.InputError(_(b'similarity must be a number'))
     if similarity < 0 or similarity > 100:
-        raise error.Abort(_(b'similarity must be between 0 and 100'))
+        raise error.InputError(_(b'similarity must be between 0 and 100'))
     similarity /= 100.0
 
     ret = 0