diff --git a/spl/std.spl b/spl/std.spl
index 6493ee6..c69c29c 100644
--- a/spl/std.spl
+++ b/spl/std.spl
@@ -427,6 +427,17 @@ construct MicroMap {
     clear { | with this ;
         this:pairs:clear;
     }
+    to-str { str | with this ;
+        "{ " 
+        { | with item ;
+            "'" concat
+            0 item:get dup null eq if { "key is null" panic } _str concat
+            "': '" concat
+            1 item:get dup null eq if { "value is null" panic } _str concat
+            "', " concat
+        } this:foreach
+        "}" concat
+    }
 }
 
 construct Range {
diff --git a/spl/stream.spl b/spl/stream.spl
index 53ff615..b8c8784 100644
--- a/spl/stream.spl
+++ b/spl/stream.spl
@@ -30,13 +30,11 @@ construct Stream {
         buf this:id read-all-stream buf
     }
     read-to-end { [int] | with buf this ;
-        def full 0 banew =full
         buf gettype "mega" eq if { buf banew =buf }
         def read
-        while { buf this:id read-stream pop _mega dup =read } {
-            full (0 read buf:sub) aadd =full
-        } pop
-        full
+        0 banew while { buf this:id read-stream pop _mega dup =read } {
+            (0 read buf:sub) aadd
+        }
     }
     write { mega | with buf this ;
         buf this:id write-stream
diff --git a/src/stream/rw.rs b/src/stream/rw.rs
index fe5d5b7..2bdde3b 100644
--- a/src/stream/rw.rs
+++ b/src/stream/rw.rs
@@ -343,7 +343,7 @@ pub(super) fn stream_cmd(stack: &mut Stack) -> Result<Stream, Error> {
         }
     }
     if args.is_empty() {
-        return stack.err(ErrorKind::InvalidCall("command".to_owned()));
+        return stack.err(ErrorKind::InvalidCall("CMD new-stream".to_owned()));
     }
     let mut command = process::Command::new(&args[0])
         .args(&args[1..])