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-rw-r--r--tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.exp1
-rw-r--r--tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.nix7
2 files changed, 8 insertions, 0 deletions
diff --git a/tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.exp b/tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.exp
new file mode 100644
index 000000000000..9d783762143e
--- /dev/null
+++ b/tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.exp
@@ -0,0 +1 @@
+[ { index = 7; key = 0; } { index = 0; key = 1; } { index = 13; key = 1; } { index = 1; key = 2; } { index = 3; key = 2; } { index = 4; key = 2; } { index = 5; key = 2; } { index = 12; key = 2; } { index = 14; key = 2; } { index = 2; key = 3; } { index = 11; key = 3; } { index = 15; key = 3; } { index = 10; key = 4; } { index = 6; key = 5; } { index = 8; key = 5; } { index = 9; key = 5; } { index = 16; key = 22; } ]
diff --git a/tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.nix b/tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.nix
new file mode 100644
index 000000000000..9969e0a29433
--- /dev/null
+++ b/tvix/eval/src/tests/tvix_tests/eval-okay-stable-sort.nix
@@ -0,0 +1,7 @@
+let
+  keys = [ 1 2 3 2 2 2 5 0 5 5 4 3 2 1 2 3 22 ];
+in
+
+builtins.sort
+  (a: b: a.key < b.key)
+  (builtins.genList (index: { inherit index; key = builtins.elemAt keys index; }) (builtins.length keys))