X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f50adbbdb02d476286814f538c2f0e20caa15199..d43baf71a71dc0fb20534f401d2b9bdfa6439927:/NEWS

diff --git a/NEWS b/NEWS
index 183b129f..9864fdea 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,24 @@ Changes in version 1.50a:
   Some people redefine yyerror to steal yyparse' private variables.
   Reenable this trick until an official feature replaces it.
 
+* Type Clashes
+  In agreement with POSIX and with other Yaccs, leaving a default
+  action is valid when $$ is untyped, and $1 typed:
+
+	untyped: ... typed;
+
+  but the converse remains an error:
+
+	typed: ... untyped;
+
+* Values of mid-rule actions
+  The following code:
+
+	foo: { ... } { $$ = $1; } ...
+
+  was incorrectly rejected: $1 is defined in the second mid-rule
+  action, and is equal to the $$ of the first mid-rule action.
+
 Changes in version 1.50, 2002-10-04:
 
 * GLR parsing