Merge pull request #12210 from NixOS/mergify/bp/2.25-maintenance/pr-11294

parser-state: fix attribute merging (backport #11294)

tests/functional/lang/eval-fail-attrset-merge-drops-later-rec.err.exp

@@ -0,0 +1,5 @@
+error: undefined variable 'd'
+       at /pwd/lang/eval-fail-attrset-merge-drops-later-rec.nix:1:26:
+            1| { a.b = 1; a = rec { c = d + 2; d = 3; }; }.c
+             |                          ^
+            2|

tests/functional/lang/eval-fail-attrset-merge-drops-later-rec.nix

@@ -0,0 +1 @@
+{ a.b = 1; a = rec { c = d + 2; d = 3; }; }.c

tests/functional/lang/eval-okay-regrettable-rec-attrset-merge.exp

@@ -0,0 +1 @@
+6

tests/functional/lang/eval-okay-regrettable-rec-attrset-merge.nix

@@ -0,0 +1,3 @@
+# This is for backwards compatibility, not because we like it.
+# See https://github.com/NixOS/nix/issues/9020.
+{ a = rec { b = c + 1; d = 2; }; a.c = d + 3; }.a.b

tests/functional/lang/parse-fail-mixed-nested-attrs1.err.exp

@@ -1,6 +1,6 @@
-error: attribute 'z' already defined at «stdin»:3:16
-       at «stdin»:2:3:
-            1| {
+error: attribute 'x.z' already defined at «stdin»:2:3
+       at «stdin»:3:16:
             2|   x.z = 3;
-             |   ^
             3|   x = { y = 3; z = 3; };
+             |                ^
+            4| }

tests/functional/lang/parse-fail-mixed-nested-attrs2.err.exp

@@ -1,6 +1,6 @@
-error: attribute 'y' already defined at «stdin»:3:9
-       at «stdin»:2:3:
-            1| {
+error: attribute 'x.y.y' already defined at «stdin»:2:3
+       at «stdin»:3:9:
             2|   x.y.y = 3;
-             |   ^
             3|   x = { y.y= 3; z = 3; };
+             |         ^
+            4| }