[Bug c/93577] New: internal compiler error: tree check: expected integer_cst, have non_lvalue_expr in get_len, at tree.h:5902

[changochen1 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93577

            Bug ID: 93577
           Summary: internal compiler error: tree check: expected
                    integer_cst, have non_lvalue_expr in get_len, at
                    tree.h:5902
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: changochen1 at gmail dot com
  Target Milestone: ---

POC:
---
int main ( ) { int x [ ] = { 1 , } ;
 struct s { int x [ 16 == ( ( ( sizeof ( ( 3 , f ( ) > 1000 < 5000 < 2 ) ) / 2
) != x > ( 6 / 3 / 2 ) ) ) ] ;
 struct { int tag ;
 struct { int tag ;
 union { struct { struct obj * car , * cdr ;
 } i ;
 double r ;
 char * sl ;
 } u ;
 int a [ 3.140000 != 2 && 0 ] ;
 } u ;
 int z ;
 } nest ;
 } g_207 = { 1 , 2 , 3 } ;
 return f == a ;
 }
---

GCC version:
---
Using built-in specs.
COLLECT_GCC=/mnt/raidhhd/gcc_instr_install/usr/local/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/raidhhd/gcc_instr_install/usr/local/bin/../libexec/gcc/x86_64-pc-linux-gnu/10.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.1 20200127 (experimental) (GCC)
---

CMD line:
---
gcc -o tmp poc.c
---