public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug c/115644] New: [gcc][trunk] ICE if redeclare a variable with different type @ 2024-06-25 12:54 141242068 at smail dot nju.edu.cn 2024-06-25 13:07 ` [Bug c/115644] " 141242068 at smail dot nju.edu.cn ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: 141242068 at smail dot nju.edu.cn @ 2024-06-25 12:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115644 Bug ID: 115644 Summary: [gcc][trunk] ICE if redeclare a variable with different type Product: gcc Version: 15.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: 141242068 at smail dot nju.edu.cn Target Milestone: --- Quick verification link: https://gcc.godbolt.org/z/fdY8KqhK6 The testing program: ``` void foo () { int p[5]; int v = *p; int *p = 0; } ``` Compiling this program using gcc-trunk will trigger crash, and dump stacks as follows: ``` 0x23be10c internal_error(char const*, ...) ???:0 0x8948df tree_class_check_failed(tree_node const*, tree_code_class, char const*, int, char const*) ???:0 0xd120d0 gimple_fold_indirect_ref(tree_node*) ???:0 0xd5b8f7 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) ???:0 0xd5f06a gimplify_stmt(tree_node**, gimple**) ???:0 0xd5c472 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) ???:0 0xd5f06a gimplify_stmt(tree_node**, gimple**) ???:0 0xd5c75b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) ???:0 0xd5f06a gimplify_stmt(tree_node**, gimple**) ???:0 0xd5bf2a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) ???:0 0xd651b3 gimplify_body(tree_node*, bool) ???:0 0xd655f9 gimplify_function_tree(tree_node*) ???:0 0xb87377 cgraph_node::analyze() ???:0 0xb8a6d1 symbol_table::finalize_compilation_unit() ???:0 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. ``` ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/115644] [gcc][trunk] ICE if redeclare a variable with different type 2024-06-25 12:54 [Bug c/115644] New: [gcc][trunk] ICE if redeclare a variable with different type 141242068 at smail dot nju.edu.cn @ 2024-06-25 13:07 ` 141242068 at smail dot nju.edu.cn 2024-06-25 16:59 ` pinskia at gcc dot gnu.org 2024-06-25 20:02 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: 141242068 at smail dot nju.edu.cn @ 2024-06-25 13:07 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115644 --- Comment #1 from wierton <141242068 at smail dot nju.edu.cn> --- This crash seems to be the same cause: https://gcc.godbolt.org/z/6br3xoaKG The testing program: ``` void f() { int p; unsigned v; v = (~0u) >> p; int p[1] = p; } ``` ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/115644] [gcc][trunk] ICE if redeclare a variable with different type 2024-06-25 12:54 [Bug c/115644] New: [gcc][trunk] ICE if redeclare a variable with different type 141242068 at smail dot nju.edu.cn 2024-06-25 13:07 ` [Bug c/115644] " 141242068 at smail dot nju.edu.cn @ 2024-06-25 16:59 ` pinskia at gcc dot gnu.org 2024-06-25 20:02 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-06-25 16:59 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115644 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to wierton from comment #1) > This crash seems to be the same cause: https://gcc.godbolt.org/z/6br3xoaKG Related in the sense redeclaring the variable with a different type changes the the underlying type of the decl to error_mark_node which the rest of the compiler is not always ready to handle. (there a few other bug reports which was caused by the same thing too). ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/115644] [gcc][trunk] ICE if redeclare a variable with different type 2024-06-25 12:54 [Bug c/115644] New: [gcc][trunk] ICE if redeclare a variable with different type 141242068 at smail dot nju.edu.cn 2024-06-25 13:07 ` [Bug c/115644] " 141242068 at smail dot nju.edu.cn 2024-06-25 16:59 ` pinskia at gcc dot gnu.org @ 2024-06-25 20:02 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2024-06-25 20:02 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115644 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2024-06-25 CC| |mpolacek at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Confirmed. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-06-25 20:02 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-06-25 12:54 [Bug c/115644] New: [gcc][trunk] ICE if redeclare a variable with different type 141242068 at smail dot nju.edu.cn 2024-06-25 13:07 ` [Bug c/115644] " 141242068 at smail dot nju.edu.cn 2024-06-25 16:59 ` pinskia at gcc dot gnu.org 2024-06-25 20:02 ` mpolacek at gcc dot gnu.org
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).