https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95124
Bug ID: 95124
Summary: internal compiler error: tree check: expected class
‘type’, have ‘exceptional’ (error_mark) in
diag_attr_exclusions, at attribs.c:396
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: anbu1024.me at gmail dot com
Target Milestone: ---
$ cat reduced.c
int foo () {
x;
void bar ( )
{
struct struct_0 * var_5 = ( { int x __attribute__ ( ( unused ,
section ( ".text" ) ) ) ; } )
}
}
$ gcc-10 --version
gcc (GCC) 10.0.1 20200419 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--------------------------------------------------------------------------------
$ gcc-10 reduced.c
reduced.c: In function ‘foo’:
reduced.c:3:2: error: ‘x’ undeclared (first use in this function)
3 | x;
| ^
reduced.c:3:2: note: each undeclared identifier is reported only once for each
function it appears in
reduced.c: In function ‘bar’:
reduced.c:7:10: internal compiler error: tree check: expected class ‘type’,
have ‘exceptional’ (error_mark) in diag_attr_exclusions, at attribs.c:396
7 | struct struct_0 * var_5 = ( { int x __attribute__ ( ( unused ,
section ( ".text" ) ) ) ; } )
| ^~~~~~~~
0x731f2f tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../gcc-10-20200419/gcc/tree.c:9777
0x5eaf44 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../gcc-10-20200419/gcc/tree.h:3410
0x5eaf44 diag_attr_exclusions
../../gcc-10-20200419/gcc/attribs.c:396
0x7d4fda diag_attr_exclusions
../../gcc-10-20200419/gcc/attribs.c:379
0x7d6fb5 decl_attributes(tree_node**, tree_node*, int, tree_node*)
../../gcc-10-20200419/gcc/attribs.c:694
0x7f2554 start_decl(c_declarator*, c_declspecs*, bool, tree_node*)
../../gcc-10-20200419/gcc/c/c-decl.c:5117
0x84cdd5 c_parser_declaration_or_fndef
../../gcc-10-20200419/gcc/c/c-parser.c:2271
0x8302bf c_parser_compound_statement_nostart
../../gcc-10-20200419/gcc/c/c-parser.c:5718
0x831f6f c_parser_postfix_expression
../../gcc-10-20200419/gcc/c/c-parser.c:9113
0x834ada c_parser_unary_expression
../../gcc-10-20200419/gcc/c/c-parser.c:8273
0x83632d c_parser_cast_expression
../../gcc-10-20200419/gcc/c/c-parser.c:8115
0x8365b9 c_parser_binary_expression
../../gcc-10-20200419/gcc/c/c-parser.c:7918
0x837595 c_parser_conditional_expression
../../gcc-10-20200419/gcc/c/c-parser.c:7652
0x837bb0 c_parser_expr_no_commas
../../gcc-10-20200419/gcc/c/c-parser.c:7569
0x83aa4c c_parser_initializer
../../gcc-10-20200419/gcc/c/c-parser.c:5227
0x83aa4c c_parser_initializer
../../gcc-10-20200419/gcc/c/c-parser.c:5219
0x84d193 c_parser_declaration_or_fndef
../../gcc-10-20200419/gcc/c/c-parser.c:2248
0x8302bf c_parser_compound_statement_nostart
../../gcc-10-20200419/gcc/c/c-parser.c:5718
0x84c8c4 c_parser_compound_statement
../../gcc-10-20200419/gcc/c/c-parser.c:5617
0x84e381 c_parser_declaration_or_fndef
../../gcc-10-20200419/gcc/c/c-parser.c:2505
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
--------------------------------------------------------------------------------
$ gcc-9 --version
gcc (GCC) 9.3.1 20200425
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--------------------------------------------------------------------------------
$ gcc-9 reduced.c
reduced.c: In function ‘foo’:
reduced.c:3:2: error: ‘x’ undeclared (first use in this function)
3 | x;
| ^
reduced.c:3:2: note: each undeclared identifier is reported only once for each
function it appears in
reduced.c: In function ‘bar’:
reduced.c:7:37: error: section attribute cannot be specified for local
variables
7 | struct struct_0 * var_5 = ( { int x __attribute__ ( ( unused ,
section ( ".text" ) ) ) ; } )
| ^
reduced.c:7:29: error: void value not ignored as it ought to be
7 | struct struct_0 * var_5 = ( { int x __attribute__ ( ( unused ,
section ( ".text" ) ) ) ; } )
| ^
reduced.c:8:2: error: expected ‘,’ or ‘;’ before ‘}’ token
8 | }
| ^
reduced.c: In function ‘foo’:
reduced.c:9:1: error: expected declaration or statement at end of input
9 | }
| ^
--------------------------------------------------------------------------------
$ gcc-8 --version
gcc (GCC) 8.4.1 20200424
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--------------------------------------------------------------------------------
$ gcc-8 reduced.c
reduced.c: In function ‘foo’:
reduced.c:3:2: error: ‘x’ undeclared (first use in this function)
x;
^
reduced.c:3:2: note: each undeclared identifier is reported only once for each
function it appears in
reduced.c: In function ‘bar’:
reduced.c:7:37: error: section attribute cannot be specified for local
variables
struct struct_0 * var_5 = ( { int x __attribute__ ( ( unused , section (
".text" ) ) ) ; } )
^
reduced.c:7:29: error: void value not ignored as it ought to be
struct struct_0 * var_5 = ( { int x __attribute__ ( ( unused , section (
".text" ) ) ) ; } )
^
reduced.c:8:2: error: expected ‘,’ or ‘;’ before ‘}’ token
}
^
reduced.c: In function ‘foo’:
reduced.c:9:1: error: expected declaration or statement at end of input
}
^
