[Bug regression/52423] New: [4.6 Regression] ICE in build_unary_op, at c-typeck.c:3786

[doko at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52423

             Bug #: 52423
           Summary: [4.6 Regression] ICE in build_unary_op, at
                    c-typeck.c:3786
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: regression
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: d...@gcc.gnu.org


works with 4.5 branch, and trunk, fails on 4.6 branch on x86_64-linux-gnu


$ gcc-4.6 -Wall xxxx.c
xxxx.c: In function 'main':
xxxx.c:13:2: warning: implicit declaration of function 'printf'
[-Wimplicit-function-declaration]
xxxx.c:13:2: warning: incompatible implicit declaration of built-in function
'printf' [enabled by default]
xxxx.c:13:2: internal compiler error: in build_unary_op, at c-typeck.c:3786
Please submit a full bug report,
with preprocessed source if appropriate.


//#include <stdio.h>


struct p_t {
        volatile unsigned int ref:3;
};

struct p_t p;


int main(void)
{
        printf("%p", &p.ref);
        return 0;
}