This patch fixes a crash in conversion_warning on a null expression.
It is null because the testcase uses the GNU A ?: B extension. We
could also use op0 instead of op1 in this case, but it doesn't seem
to be necessary.
PR c++/101030
gcc/c-family/ChangeLog:
* c-warn.cc (conversion_warning) <case COND_EXPR>: Don't call
conversion_warning when OP1 is null.
gcc/testsuite/ChangeLog:
* g++.dg/ext/cond5.C: New test.
tree op1 = TREE_OPERAND (expr, 1);
tree op2 = TREE_OPERAND (expr, 2);
- return (conversion_warning (loc, type, op1, result)
+ return ((op1 && conversion_warning (loc, type, op1, result))
|| conversion_warning (loc, type, op2, result));
}
--- /dev/null
+// PR c++/101030
+// { dg-do compile { target { c++11 } } }
+// { dg-options "-Wconversion" }
+
+template <int N>
+struct jj {
+ int ii[N ?: 1];
+ char c = N ?: 1; // { dg-warning "conversion from .int. to .char. changes value from .300. to " }
+};
+
+int main() {
+ jj<300> kk;
+}