From: Harald Anlauf <anlauf@gmx.de>
Date: Sat, 1 Mar 2025 14:42:57 +0000 (+0100)
Subject: Fortran: fix front-end memleak after failure during parsing of NULLIFY
X-Git-Tag: basepoints/gcc-16~1778
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7db0263f792466983f53652fb06268767b35305;p=thirdparty%2Fgcc.git

Fortran: fix front-end memleak after failure during parsing of NULLIFY

gcc/fortran/ChangeLog:

	* match.cc (gfc_match_nullify): Free matched expression when
	cleaning up.
	* primary.cc (match_variable): Initialize result to NULL.
---

diff --git a/gcc/fortran/match.cc b/gcc/fortran/match.cc
index c3c330520d6..ec9e5873204 100644
--- a/gcc/fortran/match.cc
+++ b/gcc/fortran/match.cc
@@ -5071,6 +5071,7 @@ cleanup:
   new_st.expr1 = NULL;
   gfc_free_expr (new_st.expr2);
   new_st.expr2 = NULL;
+  gfc_free_expr (p);
   return MATCH_ERROR;
 }
 
diff --git a/gcc/fortran/primary.cc b/gcc/fortran/primary.cc
index 8a38720422e..161d4c26964 100644
--- a/gcc/fortran/primary.cc
+++ b/gcc/fortran/primary.cc
@@ -4298,6 +4298,8 @@ match_variable (gfc_expr **result, int equiv_flag, int host_flag)
   locus where, old_loc;
   match m;
 
+  *result = NULL;
+
   /* Since nothing has any business being an lvalue in a module
      specification block, an interface block or a contains section,
      we force the changed_symbols mechanism to work by setting