The following invalid testcase triggers an ICE on trunk (and GCC 4.1.x):
====================================
struct A;
struct B
{
A a;
};
B b[1] = (B[]) { 0 };
====================================
bug.cc:5:5: error: field 'a' has incomplete type
bug.cc:8:20: error: initializer for 'B' must be brace-enclosed
bug.cc:8:20: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in digest_init_r, at cp/typeck2.c:844
Please submit a full bug report, [etc.]
If one actually defines A, the compiler goes into an infinite loop
(since GCC 4.1.0):
====================================
struct A {};
struct B
{
A a;
};
B b[1] = (B[]) { 0 };
====================================
bug.cc:8:20: error: initializer for 'A' must be brace-enclosed
bug.cc:8:20: error: initializer for 'A' must be brace-enclosed
bug.cc:8:20: error: initializer for 'A' must be brace-enclosed
[etc.]
--
Summary: [4.3/4.4/4.5 Regression] Trouble with invalid array
initialization
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, error-recovery, monitored, compile-
time-hog
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42058
