https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106399
Bug ID: 106399
Summary: Wrong debug info for function with nested function
under O0
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: liyd2021 at gmail dot com
Target Milestone: ---
Affected versions: gcc 11.1.0 (Ubuntu 20.04.2), since gcc 9
The debugger print `a` with a uninitialized value while `a` should be 3 at the
breakpoint.
(terminal) $ cat a.c && gcc -g -OO a.c
int foo(int a)
{
int a2()
{
return a * a;
}
return a2();
}
int main()
{
return foo(3) - 9;
}
--------------------
(terminal) $ gdb a.out
(gdb) b foo
Breakpoint 1 at 0x401188: file a.c, line 1.
(gdb) r
Breakpoint 1, foo (a=0) at a.c:1 <- **BUG**: a should be 3
1 int foo(int a)
