[Bug c/93574] New: internal compiler error: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in c_expr_sizeof_expr, at c/c-typeck.c:2925

[changochen1 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93574

            Bug ID: 93574
           Summary: internal compiler error: tree check: expected class
                    ‘type’, have ‘exceptional’ (error_mark) in
                    c_expr_sizeof_expr, at c/c-typeck.c:2925
           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:
---
struct s { struct { void y ;
 int z ;
 } x [ 3 + 4 ] ;
 double y ;
 } main ( ) { int x ;
 x = -- x != 1 > 0 ;
 x = ( ( 6 / ( ( 0 * sum ( 3 , 4 ) + ( 1 , 2 ) ) / 114 / 2 ) / 2 ) ) > 0 & ( x
== sizeof ( ( int * ( * ( int f ( struct list ) ) ) [ * * main ] ) 1 ) ) ;
 return x - 1 ;
 }
---

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