diff --git a/go/gg b/go/gg
index 93db9424f..8910248ee 100755
--- a/go/gg
+++ b/go/gg
@@ -52,6 +52,7 @@ mention() {
 
 # ================================================================
 
-run_mlr --oxtab fraction -f x,y -g a -p -c ./reg-test/input/abixy-het
+mlr --from ./reg-test/input/abixy put '@o[1][2][3] = 7; for(k1,v in @o[1][2]) {$x+=10;$y+=100}'
+mlr --from ./reg-test/input/xyz2 put -q 'map o = @o; dump o'
 
 # ================================================================
diff --git a/go/reg-test/cases/case-c-dsl-mapvar-assignments.sh b/go/reg-test/cases/case-dsl-mapvar-assignments.sh
similarity index 100%
rename from go/reg-test/cases/case-c-dsl-mapvar-assignments.sh
rename to go/reg-test/cases/case-dsl-mapvar-assignments.sh
diff --git a/go/reg-test/expected/case-c-dsl-mapvar-assignments.sh.out b/go/reg-test/expected/case-dsl-mapvar-assignments.sh.out
similarity index 97%
rename from go/reg-test/expected/case-c-dsl-mapvar-assignments.sh.out
rename to go/reg-test/expected/case-dsl-mapvar-assignments.sh.out
index f84f5642c..3fe484605 100644
--- a/go/reg-test/expected/case-c-dsl-mapvar-assignments.sh.out
+++ b/go/reg-test/expected/case-dsl-mapvar-assignments.sh.out
@@ -4,52 +4,49 @@
 MAPVAR ASSIGNMENTS TO FULL SREC
 
 mlr --from ./reg-test/input/xyz2 put $* = {"a":1, "b": {"x":8,"y":9}, "c":3}
-a=1,c=3
-a=1,c=3
+a=1,b.x=8,b.y=9,c=3
+a=1,b.x=8,b.y=9,c=3
 
 mlr --from ./reg-test/input/xyz2 put $* = $*
 x=3,y=4,z=5
 x=6,y=7,u=8
 
 mlr --from ./reg-test/input/xyz2 put @a = 1; $* = @a
-
-
+Exit status was 1; expected 0.
 
 mlr --from ./reg-test/input/xyz2 put @b[1] = 2; $* = @b
 1=2
 1=2
 
 mlr --from ./reg-test/input/xyz2 put @c[1][2] = 3; $* = @c
-
-
+1.2=3
+1.2=3
 
 mlr --from ./reg-test/input/xyz2 put @a = 1; $* = @*
 a=1
 a=1
 
 mlr --from ./reg-test/input/xyz2 put @b[1] = 2; $* = @*
-
-
+b.1=2
+b.1=2
 
 mlr --from ./reg-test/input/xyz2 put @c[1][2] = 3; $* = @*
-
-
+c.1.2=3
+c.1.2=3
 
 mlr --from ./reg-test/input/xyz2 put a = 1; $* = a
-
-
+Exit status was 1; expected 0.
 
 mlr --from ./reg-test/input/xyz2 put b[1] = 2; $* = b
 1=2
 1=2
 
 mlr --from ./reg-test/input/xyz2 put c[1][2] = 3; $* = c
-
-
+1.2=3
+1.2=3
 
 mlr --from ./reg-test/input/xyz2 put $* = 3
-
-
+Exit status was 1; expected 0.
 
 mlr --from ./reg-test/input/xyz2 put 
   func map_valued_func() {
@@ -145,12 +142,7 @@ x=3,y=4,z=5
 x=6,y=7,u=8
 
 mlr --from ./reg-test/input/xyz2 put @a = 1; @* = @a; dump
-{
-}
-x=3,y=4,z=5
-{
-}
-x=6,y=7,u=8
+Exit status was 1; expected 0.
 
 mlr --from ./reg-test/input/xyz2 put @b[1] = 2; @* = @b; dump
 {
@@ -219,12 +211,7 @@ x=3,y=4,z=5
 x=6,y=7,u=8
 
 mlr --from ./reg-test/input/xyz2 put a = 1; @* = a; dump
-{
-}
-x=3,y=4,z=5
-{
-}
-x=6,y=7,u=8
+Exit status was 1; expected 0.
 
 mlr --from ./reg-test/input/xyz2 put b[1] = 2; @* = b; dump
 {
@@ -251,8 +238,7 @@ x=3,y=4,z=5
 x=6,y=7,u=8
 
 mlr --from ./reg-test/input/xyz2 put @* = 3
-x=3,y=4,z=5
-x=6,y=7,u=8
+Exit status was 1; expected 0.
 
 mlr --from ./reg-test/input/xyz2 put 
   func map_valued_func() {
@@ -315,8 +301,6 @@ mlr --from ./reg-test/input/xyz2 put -q @o = {"a":1, "b": {"x":8,"y":9}, "c":3};
 
 mlr --from ./reg-test/input/xyz2 put -q @o = @o; dump @o
 
-
-
 mlr --from ./reg-test/input/xyz2 put -q @o = {"a":1, "b": {"x":8,"y":9}, "c":3}; dump; @o = @*; dump
 {
   "o": {
@@ -559,7 +543,7 @@ mlr --from ./reg-test/input/xyz2 put -q map o = {"a":1, "b": {"x":8,"y":9}, "c":
 }
 
 mlr --from ./reg-test/input/xyz2 put -q map o = @o; dump o
-mlr: map type assertion for variable o unmet by value "" with type absent.
+Exit status was 0; expected 1.
 
 mlr --from ./reg-test/input/xyz2 put -q map o = $*; dump o
 {
@@ -592,7 +576,6 @@ mlr --from ./reg-test/input/xyz2 put -q map o = {"a":1, "b": {"x":8,"y":9}, "c":
 }
 
 mlr --from ./reg-test/input/xyz2 put -q @a = 1; map o = @a; dump o
-mlr: map type assertion for variable o unmet by value 1 with type int.
 
 mlr --from ./reg-test/input/xyz2 put -q @b[1] = 2; map o = @b; dump o
 {
@@ -651,7 +634,6 @@ mlr --from ./reg-test/input/xyz2 put -q @c[1][2] = 3; map o = @*; dump o
 }
 
 mlr --from ./reg-test/input/xyz2 put -q a = 1; map o = a; dump o
-mlr: map type assertion for variable o unmet by value 1 with type int.
 
 mlr --from ./reg-test/input/xyz2 put -q b[1] = 2; map o = b; dump o
 {
@@ -707,8 +689,6 @@ mlr --from ./reg-test/input/xyz2 put -q var o = {"a":1, "b": {"x":8,"y":9}, "c":
 
 mlr --from ./reg-test/input/xyz2 put -q var o = @o; dump o
 
-
-
 mlr --from ./reg-test/input/xyz2 put -q var o = $*; dump o
 {
   "x": 3,
@@ -857,8 +837,6 @@ mlr --from ./reg-test/input/xyz2 put -q o = {"a":1, "b": {"x":8,"y":9}, "c":3};
 
 mlr --from ./reg-test/input/xyz2 put -q o = @o; dump o
 
-
-
 mlr --from ./reg-test/input/xyz2 put -q o = $*; dump o
 {
   "x": 3,