Merge pull request #9926 from 9999years/fix-cycle-detection-in-nix-repl

Fix cycle detection in `nix repl`

(cherry picked from commit e190c20c3394fd1a5cd9be1afc3f30ab32dcd36b)
Change-Id: Ie385e781b9f0b7171ca653bcd53a990bb41f9e4b

tests/functional/repl.sh

@@ -161,7 +161,7 @@ testReplResponseNoRegex '
 # Same for let expressions
 testReplResponseNoRegex '
 let x = { y = { a = 1; }; inherit x; }; in x
-' '{ x = { ... }; y = { ... }; }'
+' '{ x = «repeated»; y = { ... }; }'
 
 # The :p command should recursively print sets, but prevent infinite recursion
 testReplResponseNoRegex '
@@ -176,4 +176,4 @@ testReplResponseNoRegex '
 # Same for let expressions
 testReplResponseNoRegex '
 :p let x = { y = { a = 1; }; inherit x; }; in x
-' '{ x = { x = «repeated»; y = { a = 1; }; }; y = «repeated»; }'
+' '{ x = «repeated»; y = { a = 1; }; }'