diff --git a/isocline.cabal b/isocline.cabal
--- a/isocline.cabal
+++ b/isocline.cabal
@@ -1,11 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.34.4.
+-- This file has been generated from package.yaml by hpack version 0.34.6.
 --
 -- see: https://github.com/sol/hpack
 
 name:           isocline
-version:        1.0.7
+version:        1.0.8
 synopsis:       A portable alternative to GNU Readline
 description:    ![logo](https://raw.githubusercontent.com/daanx/isocline/main/doc/isocline-inline.svg) A Haskell wrapper around the [Isocline C library](https://github.com/daanx/isocline#readme) which can provide an alternative to GNU Readline. (The Isocline library is included whole and there are no runtime dependencies).
                 Please see the [readme](https://github.com/daanx/isocline/haskell#readme) on GitHub for more information.
diff --git a/src/bbcode.c b/src/bbcode.c
--- a/src/bbcode.c
+++ b/src/bbcode.c
@@ -763,6 +763,7 @@
 }
 
 ic_private void bbcode_append( bbcode_t* bb, const char* s, stringbuf_t* out, attrbuf_t* attr_out ) {
+  if (bb == NULL || s == NULL) return;
   attr_t attr = attr_none();
   const ssize_t base = bb->tags_nesting; // base; will not be popped
   ssize_t i = 0;
@@ -802,7 +803,7 @@
 }
 
 ic_private void bbcode_print( bbcode_t* bb, const char* s ) {
-  if (bb->out == NULL || bb->out_attrs == NULL) return;
+  if (bb->out == NULL || bb->out_attrs == NULL || s == NULL) return;
   assert(sbuf_len(bb->out) == 0 && attrbuf_len(bb->out_attrs) == 0);
   bbcode_append( bb, s, bb->out, bb->out_attrs );
   term_write_formatted( bb->term, sbuf_string(bb->out), attrbuf_attrs(bb->out_attrs,sbuf_len(bb->out)) );
@@ -816,7 +817,7 @@
 }
 
 ic_private void bbcode_vprintf( bbcode_t* bb, const char* fmt, va_list args  ) {
-  if (bb->vout == NULL) return;
+  if (bb->vout == NULL || fmt == NULL) return;
   assert(sbuf_len(bb->vout) == 0);
   sbuf_append_vprintf(bb->vout,fmt,args);
   bbcode_print(bb, sbuf_string(bb->vout));
@@ -831,7 +832,7 @@
 }
 
 ic_private ssize_t bbcode_column_width( bbcode_t* bb, const char* s ) {
-  if (s==0 || s[0] == 0) return 0;
+  if (s==NULL || s[0] == 0) return 0;
   if (bb->vout == NULL) { return str_column_width(s); }
   assert(sbuf_len(bb->vout) == 0); 
   bbcode_append( bb, s, bb->vout, NULL);
diff --git a/src/term.c b/src/term.c
--- a/src/term.c
+++ b/src/term.c
@@ -348,42 +348,43 @@
   if (getenv("NO_COLOR") != NULL) {
     term->nocolor = true;
   }
-
-  // detect color palette
-  // COLORTERM takes precedence
-  const char* colorterm = getenv("COLORTERM");  
-  const char* eterm = getenv("TERM");    
-  if (ic_contains(colorterm,"24bit") || ic_contains(colorterm,"truecolor") || ic_contains(colorterm,"direct")) { 
-    term->palette = ANSIRGB; 
-  }
-  else if (ic_contains(colorterm,"8bit") || ic_contains(colorterm,"256color")) { term->palette = ANSI256; } 
-  else if (ic_contains(colorterm,"4bit") || ic_contains(colorterm,"16color"))  { term->palette = ANSI16; }
-  else if (ic_contains(colorterm,"3bit") || ic_contains(colorterm,"8color"))   { term->palette = ANSI8; }
-  else if (ic_contains(colorterm,"1bit") || ic_contains(colorterm,"nocolor") || ic_contains(colorterm,"monochrome")) { 
-    term->palette = MONOCHROME; 
-  }
-  // otherwise check for some specific terminals
-  else if (getenv("WT_SESSION") != NULL) { term->palette = ANSIRGB; } // Windows terminal
-  else if (getenv("ITERM_SESSION_ID") != NULL) { term->palette = ANSIRGB; } // iTerm2 terminal
-  else if (getenv("VSCODE_PID") != NULL) { term->palette = ANSIRGB; } // vscode terminal
-  else {
-    // and otherwise fall back to checking TERM
-    if (ic_contains(eterm,"truecolor") || ic_contains(eterm,"direct") || ic_contains(colorterm,"24bit")) {
-      term->palette = ANSIRGB;
-    }
-    else if (ic_contains(eterm,"alacritty") || ic_contains(eterm,"kitty")) {
-      term->palette = ANSIRGB;
+  if (!term->nocolor) {
+    // detect color palette
+    // COLORTERM takes precedence
+    const char* colorterm = getenv("COLORTERM");  
+    const char* eterm = getenv("TERM");    
+    if (ic_contains(colorterm,"24bit") || ic_contains(colorterm,"truecolor") || ic_contains(colorterm,"direct")) { 
+      term->palette = ANSIRGB; 
     }
-    else if (ic_contains(eterm,"256color") || ic_contains(eterm,"gnome")) { 
-      term->palette = ANSI256;
-    }  
-    else if (ic_contains(eterm,"16color")){ term->palette = ANSI16; }
-    else if (ic_contains(eterm,"8color")) { term->palette = ANSI8; }
-    else if (ic_contains(eterm,"monochrome") || ic_contains(eterm,"nocolor") || ic_contains(eterm,"dumb")) { 
+    else if (ic_contains(colorterm,"8bit") || ic_contains(colorterm,"256color")) { term->palette = ANSI256; } 
+    else if (ic_contains(colorterm,"4bit") || ic_contains(colorterm,"16color"))  { term->palette = ANSI16; }
+    else if (ic_contains(colorterm,"3bit") || ic_contains(colorterm,"8color"))   { term->palette = ANSI8; }
+    else if (ic_contains(colorterm,"1bit") || ic_contains(colorterm,"nocolor") || ic_contains(colorterm,"monochrome")) { 
       term->palette = MONOCHROME; 
     }
+    // otherwise check for some specific terminals
+    else if (getenv("WT_SESSION") != NULL) { term->palette = ANSIRGB; } // Windows terminal
+    else if (getenv("ITERM_SESSION_ID") != NULL) { term->palette = ANSIRGB; } // iTerm2 terminal
+    else if (getenv("VSCODE_PID") != NULL) { term->palette = ANSIRGB; } // vscode terminal
+    else {
+      // and otherwise fall back to checking TERM
+      if (ic_contains(eterm,"truecolor") || ic_contains(eterm,"direct") || ic_contains(colorterm,"24bit")) {
+        term->palette = ANSIRGB;
+      }
+      else if (ic_contains(eterm,"alacritty") || ic_contains(eterm,"kitty")) {
+        term->palette = ANSIRGB;
+      }
+      else if (ic_contains(eterm,"256color") || ic_contains(eterm,"gnome")) { 
+        term->palette = ANSI256;
+      }  
+      else if (ic_contains(eterm,"16color")){ term->palette = ANSI16; }
+      else if (ic_contains(eterm,"8color")) { term->palette = ANSI8; }
+      else if (ic_contains(eterm,"monochrome") || ic_contains(eterm,"nocolor") || ic_contains(eterm,"dumb")) { 
+        term->palette = MONOCHROME; 
+      }
+    }
+    debug_msg("term: color-bits: %d (COLORTERM=%s, TERM=%s)\n", term_get_color_bits(term), colorterm, eterm);
   }
-  debug_msg("term: color-bits: %d (COLORTERM=%s, TERM=%s)\n", term_get_color_bits(term), colorterm, eterm);
   
   // read COLUMS/LINES from the environment for a better initial guess.
   const char* env_columns = getenv("COLUMNS");
diff --git a/test/Example.hs b/test/Example.hs
--- a/test/Example.hs
+++ b/test/Example.hs
@@ -57,8 +57,9 @@
               [ ("D — (x) => x",       "(x) => x")
               , ("Haskell — \\x -> x", "\\x -> x")
               , ("Idris — \\x => x",   "\\x => x")
-              , ("Koka — fn(x){ x }",  "fn(x){ x }")
-              , ("Ocaml — fun x -> x", "fun x -> x")]
+              , ("Ocaml — fun x -> x", "fun x -> x")
+              , ("Koka — fn(x) x",  "fn(x) x")
+              , ("Rust — |x| x", "|x| x") ]
          else []) 
        ++
        -- add many hello isocline completions; we should generate these lazily!