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-rw-r--r--tools/d2c/bits/tokens.l6
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/d2c/bits/tokens.l b/tools/d2c/bits/tokens.l
index 99fb96d..4879f4f 100644
--- a/tools/d2c/bits/tokens.l
+++ b/tools/d2c/bits/tokens.l
@@ -29,5 +29,11 @@
[01] { yylvalp->integer = atoi(yytext); return BIT; }
+. {
+ char *msg;
+ asprintf(&msg, "Unhandled token in d2c bits block: '%s'", yytext);
+ YY_FATAL_ERROR(msg);
+ free(msg);
+ }
%%