Suppose I have the following code :
****************************************
extern crate rand;
use rand::{task_rng, Rng};
fn main() {
let names = ["Alice", "Bob", "Carol"];
for name in names.iter() {
let v = task_rng().shuffle(~[1,2,3]);
for num in v.iter() {
println!("{:s} says: {:d}", *name, *num);
}
}
}
****************************************
Then I can put a breakpoint at shuffle by doing :
rustc -g prog1.rs
gdb ./prog1
rbreak shuffle
run
However at this point if I try to step into the shuffle function and list
the code I get something like :
****************************************
(gdb) where
#0 0x0000000000404fe0 in Rng::shuffle_mut::h20bb47036b05fab8lja::v0.0 ()
#1 0x0000000000404f58 in Rng::shuffle::h5fded7dc864fa562Uia::v0.0 ()
#2 0x0000000000404634 in prog1::main () at prog1.rs:7
#3 0x000000000043e453 in start::closure.7865 ()
#4 0x00000000004d9263 in rt::task::Task::run::closure.41627 ()
#5 0x00000000004e47dc in rust_try ()
#6 0x00000000004d90c2 in rt::task::Task::run::h50a26072019a80d2fs9::v0.10
()
#7 0x000000000043e244 in start::h4be0315ccbf00887zvd::v0.10 ()
#8 0x000000000043e034 in lang_start::he9dd0a0b44e890dcTud::v0.10 ()
#9 0x00000000004048bf in main ()
(gdb) list
Line number 13 out of range; prog1.rs has 12 lines.
****************************************
How can I step through the source of Rng::shuffle? I downloaded the source
and when I did "./configure --help" I saw "--disable-optimize
don't build optimized rust code". So do I need to build the source with
this option? Thanks.
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