diff --git a/src/eval.c b/src/eval.c
index 5dc1642..2e8ab3d 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -2177,6 +2177,11 @@
 	vim_free(evalarg->eval_tofree);
 	evalarg->eval_tofree = line;
     }
+
+    // Advanced to the next line, "arg" no longer points into the previous
+    // line.
+    VIM_CLEAR(evalarg->eval_tofree_cmdline);
+
     return skipwhite(line);
 }
 
diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index c89c13e..a2c4e7d 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -2265,6 +2265,22 @@
         })
   END
   CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+
+      def s:func()
+        range(10)
+          ->mapnew((_, _) => ({
+            key: range(10)->mapnew((_, _) => {
+              return ' '
+            }),
+          }))
+      enddef
+
+      defcomp
+  END
+  CheckScriptSuccess(lines)
 enddef
 
 def Shadowed(): list<number>
diff --git a/src/version.c b/src/version.c
index e1421dd..8b674d3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3175,
+/**/
     3174,
 /**/
     3173,