[Bug c/93574] 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

--- Comment #1 from Yongheng Chen <changochen1 at gmail dot com> ---
Stack dump:
---
tt.c:1:26: error: variable or field ‘y’ declared void
    1 | struct s { struct { void y ;
      |                          ^
tt.c: In function ‘main’:
tt.c:7:23: warning: implicit declaration of function ‘sum’
[-Wimplicit-function-declaration]
    7 |   x = ( ( 6 / ( ( 0 * sum ( 3 , 4  ) + ( 1 , 2  )  ) / 114 / 2  ) / 2 
)  ) > 0 & ( x == sizeof ( ( int * ( * ( int f ( struct list  )  )  ) [ * *
main  ]  ) 1  )  ) ;
      |                       ^~~
tt.c:7:128: warning: ‘struct list’ declared inside parameter list will not be
visible outside of this definition or declaration
    7 |   x = ( ( 6 / ( ( 0 * sum ( 3 , 4  ) + ( 1 , 2  )  ) / 114 / 2  ) / 2 
)  ) > 0 & ( x == sizeof ( ( int * ( * ( int f ( struct list  )  )  ) [ * *
main  ]  ) 1  )  ) ;
      |                                                                        
                                                       ^~~~
tt.c:7:128: error: size of unnamed array has non-integer type
tt.c:7:99: error: cast specifies function type
    7 |   x = ( ( 6 / ( ( 0 * sum ( 3 , 4  ) + ( 1 , 2  )  ) / 114 / 2  ) / 2 
)  ) > 0 & ( x == sizeof ( ( int * ( * ( int f ( struct list  )  )  ) [ * *
main  ]  ) 1  )  ) ;
      |                                                                        
                          ^
tt.c:7:128: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in c_expr_sizeof_expr, at c/c-typeck.c:2925
    7 |   x = ( ( 6 / ( ( 0 * sum ( 3 , 4  ) + ( 1 , 2  )  ) / 114 / 2  ) / 2 
)  ) > 0 & ( x == sizeof ( ( int * ( * ( int f ( struct list  )  )  ) [ * *
main  ]  ) 1  )  ) ;
      |                                                                        
                                                       ^~~~
0x7610ae tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
        ../../gcc/tree.c:9735
0x625ebb tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
        ../../gcc/tree.h:3401
0x625ebb c_expr_sizeof_expr(unsigned int, c_expr)
        ../../gcc/c/c-typeck.c:2925
0x862167 c_parser_sizeof_expression
        ../../gcc/c/c-parser.c:8341
0x862167 c_parser_unary_expression
        ../../gcc/c/c-parser.c:8238
0x862dad c_parser_cast_expression
        ../../gcc/c/c-parser.c:8108
0x8631b1 c_parser_binary_expression
        ../../gcc/c/c-parser.c:8034
0x864025 c_parser_conditional_expression
        ../../gcc/c/c-parser.c:7645
0x864640 c_parser_expr_no_commas
        ../../gcc/c/c-parser.c:7562
0x8648a1 c_parser_expression
        ../../gcc/c/c-parser.c:10630
0x85d495 c_parser_postfix_expression
        ../../gcc/c/c-parser.c:9121
0x86155a c_parser_unary_expression
        ../../gcc/c/c-parser.c:8266
0x862dad c_parser_cast_expression
        ../../gcc/c/c-parser.c:8108
0x8631b1 c_parser_binary_expression
        ../../gcc/c/c-parser.c:8034
0x864025 c_parser_conditional_expression
        ../../gcc/c/c-parser.c:7645
0x864640 c_parser_expr_no_commas
        ../../gcc/c/c-parser.c:7562
0x8646ea c_parser_expr_no_commas
        ../../gcc/c/c-parser.c:7604
0x8648a1 c_parser_expression
        ../../gcc/c/c-parser.c:10630
0x865047 c_parser_expression_conv
        ../../gcc/c/c-parser.c:10663
0x85a90b c_parser_statement_after_labels
        ../../gcc/c/c-parser.c:6294
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