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* [Bug python/28647] New: Python pretty-printer doesn't work with std::variant containing local type
@ 2021-12-04 1:53 bugmenot at mailinator dot com
2021-12-04 20:27 ` [Bug python/28647] " ssbssa at sourceware dot org
2022-01-05 16:26 ` ssbssa at sourceware dot org
0 siblings, 2 replies; 3+ messages in thread
From: bugmenot at mailinator dot com @ 2021-12-04 1:53 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=28647
Bug ID: 28647
Summary: Python pretty-printer doesn't work with std::variant
containing local type
Product: gdb
Version: 10.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: python
Assignee: unassigned at sourceware dot org
Reporter: bugmenot at mailinator dot com
Target Milestone: ---
When I compile this program:
```
#include <variant>
#include <vector>
struct G {
int x;
};
int main() {
struct A {
int x;
};
A a;
std::variant<A> b {a};
std::vector<A> c {a};
std::variant<G> d {G {}};
__builtin_trap();
}
```
Then run it in gdb, note that `print b` prints
```
std::variant<> [no contained value]
```
but `print d` prints
```
std::variant<G> [index 0] = {{x = 0}}
```
In the first case the print is wrong.
It's caused by `Type.template_argument` function: If this is called in the
Python shell
```
>>> gdb.lookup_symbol("b")[0].type.template_argument(0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RuntimeError: syntax error
```
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* [Bug python/28647] Python pretty-printer doesn't work with std::variant containing local type
2021-12-04 1:53 [Bug python/28647] New: Python pretty-printer doesn't work with std::variant containing local type bugmenot at mailinator dot com
@ 2021-12-04 20:27 ` ssbssa at sourceware dot org
2022-01-05 16:26 ` ssbssa at sourceware dot org
1 sibling, 0 replies; 3+ messages in thread
From: ssbssa at sourceware dot org @ 2021-12-04 20:27 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=28647
Hannes Domani <ssbssa at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ssbssa at sourceware dot org
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* [Bug python/28647] Python pretty-printer doesn't work with std::variant containing local type
2021-12-04 1:53 [Bug python/28647] New: Python pretty-printer doesn't work with std::variant containing local type bugmenot at mailinator dot com
2021-12-04 20:27 ` [Bug python/28647] " ssbssa at sourceware dot org
@ 2022-01-05 16:26 ` ssbssa at sourceware dot org
1 sibling, 0 replies; 3+ messages in thread
From: ssbssa at sourceware dot org @ 2022-01-05 16:26 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=28647
--- Comment #1 from Hannes Domani <ssbssa at sourceware dot org> ---
Is this a duplicate of PR20590?
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2021-12-04 1:53 [Bug python/28647] New: Python pretty-printer doesn't work with std::variant containing local type bugmenot at mailinator dot com
2021-12-04 20:27 ` [Bug python/28647] " ssbssa at sourceware dot org
2022-01-05 16:26 ` ssbssa at sourceware dot org
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