The testcase gcc.dg/noncompile/920923-1.c causes an ICE on the 3.4 branch.
A reduced testcase is:
=======================
typedef struct A B;
int i = sizeof(B);
=======================
bug.c:2: error: invalid application of `sizeof' to incomplete type `
Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report, [etc.]
The culprit is the code in c-objc-common.c (c_tree_printer) <case 'T'>:
case 'T':
if (TREE_CODE (t) == TYPE_DECL)
{
if (DECL_NAME (t))
n = (*lang_hooks.decl_printable_name) (t, 2);
}
else
{
t = TYPE_NAME (t);
if (t)
n = IDENTIFIER_POINTER (t);
}
break;
In the above case t is a RECORD_TYPE, but TYPE_NAME (t) is a TYPE_DECL.
So there's some logic missing to handle this case.
The other problem is that the testcase in the testsuite PASSed
despite the ICE. The comment on top of the testcase says:
/* This test case contains a large number of syntactic errors. We
believe the intent of the test is that the compiler simply not
crash. The set of error messages reported is different when the C
parser is generated with bison 1.50 than 1.35. It is not worth
attempting to prevent this. Instead, we use a single dg-error with
a regexp that will match _all_ the errors indiscriminately. The
old error/warning/etc markers are kept around for reference, but
disabled.
Revisit after new (recursive descent) parser is implemented for C.
-- zw 2002-10-17 */
/* { dg-error ".*" "many syntax errors" { target *-*-* } 0 } */
Well, the regexp also matches the ICE-message, so the testcase is
now broken. While this is probably hard to fix in 3.4 and 4.0,
the testcase be revisited on mainline and the 4.1 branch where the
new C parser is in place.
I'll file a new PR for this.
--
Summary: [3.4 regression] ICE for sizofe of incomplete type
Product: gcc
Version: 3.4.5
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, monitored
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=25301
