1 files changed, 15 insertions, 0 deletions
diff --git a/parser.l b/parser.l
index 5919f929..b15f5ad1 100644
--- a/parser.l
+++ b/parser.l
@@ -399,6 +399,11 @@ UONLY   {U2}{U}|{U3}{U}{U}|{U4}{U}{U}{U}
                           yyerrorf("bad character in directive: '%s'", yytext);
                         }
 
+<SPECIAL,NESTED>.       {
+                          yyerrorf("non-UTF-8 byte in directive: '\\x%02x'",
+                                   (unsigned char) yytext[0]);
+                        }
+
 <REGEX>[/]      {
                   yy_pop_state();
                   if (yy_top_state() == INITIAL
@@ -452,6 +457,11 @@ UONLY   {U2}{U}|{U3}{U}{U}|{U4}{U}{U}{U}
                   return REGCHAR;
                 }
 
+<REGEX>.        {
+                   yyerrorf("non-UTF-8 byte in regex: '\\x%02x'",
+                            (unsigned char) yytext[0]);
+                }
+
 <INITIAL>({UONLY}|[^@\n])+        {
                                     yylval.lexeme = utf8_dup_from(yytext);
                                     return TEXT;
@@ -536,4 +546,9 @@ UONLY   {U2}{U}|{U3}{U}{U}|{U4}{U}{U}{U}
                                 return LITCHAR;
                               }
 
+<STRLIT,CHRLIT,QSILIT>. {
+                          yyerrorf("non-UTF-8 byte in literal: '\\x%02x'",
+                                   (unsigned char) yytext[0]);
+                        }
+
 %%