[Bug c/28504] New: [4.0/4.1/4.2 regression] ICE with variable sized array

[reichelt at gcc dot gnu dot org]

The following testcase triggers an ICE since GCC 4.0.0:

==========================================
void foo(void (*p)(int n, int x[n])) {}
==========================================

bug.c: In function 'foo':
bug.c:1: internal compiler error: in make_decl_rtl, at varasm.c:1005
Please submit a full bug report, [etc.]

I'm not sure whether the code is invalid as an extension or not.

  void bar(int n, int x[n]) {}

is accepted as well as

  void foo(void (*p)(int n, int x[n]));

The C++ frontend rejects it, see also
http://gcc.gnu.org/ml/gcc/2006-07/msg00479.html


-- 
           Summary: [4.0/4.1/4.2 regression] ICE with variable sized array
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-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=28504