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From: "simark at simark dot ca" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/28063] ASan crash in value_primitive_field /
 value_contents_copy_raw when printing std::tuple
Date: Thu, 08 Jul 2021 00:26:43 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28063

--- Comment #4 from Simon Marchi <simark at simark dot ca> ---
Here's a simpler reproducer:

---
#include <memory>

int main() {
  std::unique_ptr<int> p(new int);
  return 0;
}
---

$ g++ --version
g++ (GCC) 11.1.0
$ g++ -g3 -O0 test.cpp
$ readelf --debug-dump a.out
...
 <3><968>: Abbrev Number: 79 (DW_TAG_member)
    <969>   DW_AT_name        : (strp) (offset: 0xc42a): _M_head_impl
    <96d>   DW_AT_decl_file   : (data1) 4
    <96e>   DW_AT_decl_line   : (data1) 125
    <96f>   DW_AT_decl_column : (data1) 39
    <970>   DW_AT_type        : (ref4) <0x67e>, default_delete<int>
    <974>   DW_AT_data_member_location: (sdata) -1
...
$ ./gdb -q -nx --data-directory=3Ddata-directory ./a.out -ex "b 5" -ex r -e=
x "p
p"
<ASan crash like above>

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