[Bug gdb/21549] c-typeprint.c:262: internal-error: void cp_type_print_method_args(type*, const char*, const char*, int, ui_file*, const type_print_options*): Assertion `TYPE_CODE (args[0].type) == TYPE_CODE_PTR' failed.

keiths at redhat dot com sourceware-bugzilla@sourceware.org
Mon Jun 12 22:01:00 GMT 2017


https://sourceware.org/bugzilla/show_bug.cgi?id=21549

--- Comment #10 from Keith Seitz <keiths at redhat dot com> ---
Looking at the DWARF and session information you've provided, I *think* GDB is
asserting on the following symbol:

_ZN5Shell6TinySh8cmd_helpERS0_iPPKc

That is: Shell::TinySh::cmd_help(Shell::TinySh&, int, char const**).

According to the debug info, "Shell" is a namespace. "TinySh" is a structure,
and cmd_help is a *method* of that structure:

 <3><15dc>: Abbrev Number: 68 (DW_TAG_subprogram)
    <15dd>   DW_AT_external    : 1      
    <15dd>   DW_AT_name        : (indirect string, offset: 0x1621): cmd_help    
    <15e1>   DW_AT_decl_file   : 20     
    <15e2>   DW_AT_decl_line   : 49     
    <15e3>   DW_AT_linkage_name: (indirect string, offset: 0xa7b):
_ZN5Shell6Tin
ySh8cmd_helpERS0_iPPKc  
    <15e7>   DW_AT_prototyped  : 1      
    <15e7>   DW_AT_accessibility: 3     (private)
    <15e8>   DW_AT_declaration : 1      
 <4><15e8>: Abbrev Number: 13 (DW_TAG_formal_parameter)
    <15e9>   DW_AT_type        : <0x1691>       
 <4><15ed>: Abbrev Number: 13 (DW_TAG_formal_parameter)
    <15ee>   DW_AT_type        : <0x4f> 
 <4><15f2>: Abbrev Number: 13 (DW_TAG_formal_parameter)
    <15f3>   DW_AT_type        : <0x1697>       
 <4><15f7>: Abbrev Number: 0

The first parameter of this (private) method has type given by 0x1691, which is
a *reference* to TinySh, not a pointer. Not only that, but this first parameter
is also not marked artificial.

Can you provide the source declaration for Shell::TinySh::cmd_help?

>From what I can infer from this, GDB (erroneously) marks cmd_help as a
non-static member function, but it's really just a guess.

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