Control: reassign -1 gcc-14 On Friday, January 16 2015, Mathieu Malaterre wrote:
> Control: found -1 7.7.1+dfsg-5 > > Still present in jessie: > > $ wget > "https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=d2.c;att=1;bug=730630"; > $ gcc -o demo -g d2.c > $ gdb ./demo > GNU gdb (Debian 7.7.1+dfsg-5) 7.7.1 > Copyright (C) 2014 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. Type "show copying" > and "show warranty" for details. > This GDB was configured as "x86_64-linux-gnu". > Type "show configuration" for configuration details. > For bug reporting instructions, please see: > <http://www.gnu.org/software/gdb/bugs/>. > Find the GDB manual and other documentation resources online at: > <http://www.gnu.org/software/gdb/documentation/>. > For help, type "help". > Type "apropos word" to search for commands related to "word"... > Reading symbols from ./demo...done. > (gdb) b main > Breakpoint 1 at 0x4004d0: file d2.c, line 16. > (gdb) r > Starting program: /tmp/demo > > Breakpoint 1, main (argc=1, argv=0x7fffffffe918) at d2.c:16 > (gdb) list > Line number 16 out of range; d2.c has 11 lines. GDB's output nowadays is better: --8<---------------cut here---------------start------------->8--- (gdb) r Starting program: /root/demo [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Breakpoint 1, main (argc=1, argv=0x7fffffffec28) at d2.c:16 (gdb) list End of the file was already reached, use "list ." to list the current location again --8<---------------cut here---------------end--------------->8--- Still, one can see that GDB thinks the breakpoint hit on line 16, which is wrong. But GDB is only following what DWARF is telling it: --8<---------------cut here---------------start------------->8--- <2><6a>: Abbrev Number: 5 (DW_TAG_variable) <6b> DW_AT_name : v <6d> DW_AT_decl_file : 1 <6e> DW_AT_decl_line : 16 <6f> DW_AT_decl_column : 7 <70> DW_AT_type : <0x78> <74> DW_AT_location : 2 byte block: 91 6c (DW_OP_fbreg: -20) --8<---------------cut here---------------end--------------->8--- GCC is the one emitting bogus DW_AT_decl_line information here. Therefore, I'm reassigning this bug to GCC. Thanks, -- Sergio GPG key ID: 237A 54B1 0287 28BF 00EF 31F4 D0EB 7628 65FC 5E36 Please send encrypted e-mail if possible https://sergiodj.net/
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