[lldb-dev] lldb fails to examine any variable with the message - Interpreting the expression locally failed: Interpreter couldn't write to memory

[Samuel Jacob]

lldb build from trunk running on Ubuntu 12.04 is not able examine any variable.

$cat test1.c
int main(int argc, char argv[])
{
    char *crash=0;

    *crash = 0;
    return 0;
}

$gcc -O0 -g3 ./test1.c

$lldb ~/a.out
Current executable set to '/mts/home3/jacobs/a.out' (x86_64).

(lldb) run
Process 16615 launched: '/mts/home3/jacobs/a.out' (x86_64)
Process 16615 stopped
* thread #1: tid = 0x40e7, 0x00000000004004cb a.out`main(argc=1,
argv=0x00007fff336ad2a8) + 23 at test1.c:5, stop reason = invalid
address
    frame #0: 0x00000000004004cb a.out`main(argc=1,
argv=0x00007fff336ad2a8) + 23 at test1.c:5
   2    {
   3        char *crash=0;
   4
-> 5        *crash = 0;
   6        return 0;
   7    }
(lldb) p argc
error: Interpreting the expression locally failed: Interpreter
couldn't write to memory

But before crashing If a breakpoint was setup, lldb stops at the
breakpoint and works fine.

Is it a known issue or should a file a bug report?

Samuel