This prevents segfault in ocp_convert. If the ENUM_UNDERLYING_TYPE
is NULL, don't call int_fits_type_p on it. We give meaningful error
message on the attached testcase; it's the same message as GCC
3.4/4.0.2/4.4 gave (these GCC didn't ICE on it).
Bootstrapped/regtested on x86_64-linux, ok for trunk/4.8/4.7?
2014-01-17 Marek Polacek <pola...@redhat.com>
PR c++/59838
cp/
* cvt.c (ocp_convert): Don't segfault on non-existing
ENUM_UNDERLYING_TYPE.
testsuite/
* g++.dg/diagnostic/pr59838.C: New test.
--- gcc/cp/cvt.c.mp3 2014-01-17 12:01:20.926793491 +0100
+++ gcc/cp/cvt.c 2014-01-17 12:01:55.297920771 +0100
@@ -753,6 +753,7 @@ ocp_convert (tree type, tree expr, int c
unspecified. */
if ((complain & tf_warning)
&& TREE_CODE (e) == INTEGER_CST
+ && ENUM_UNDERLYING_TYPE (type)
&& !int_fits_type_p (e, ENUM_UNDERLYING_TYPE (type)))
warning_at (loc, OPT_Wconversion,
"the result of the conversion is unspecified because "
--- gcc/testsuite/g++.dg/diagnostic/pr59838.C.mp3 2014-01-17
12:21:08.111663754 +0100
+++ gcc/testsuite/g++.dg/diagnostic/pr59838.C 2014-01-17 12:22:08.192886710
+0100
@@ -0,0 +1,4 @@
+// PR c++/59838
+// { dg-do compile }
+
+enum E { a, b = (E) a }; // { dg-error "conversion to incomplete type" }
Marek
