::rt::backtrace Backtraces are not very useful on Mac #1650
Description
If I do export RUST_LOG=rt.backtrace and then compile and run the following program:
fn z() { fail "fleh"; }
fn y() { z(); }
fn x() { y(); }
fn main() {
x();
}
I would expect to see a backtrace that mentions the functions main, x, y, and z. Instead, I get:
rust: upcall fail 'fleh', ./src/test/run-fail/bt-test.rs:1
0 librustrt.dylib 0x0000000102511279 __morestack + 9
I've seen similar results when running other programs. The stack trace says something about __morestack but nothing about function calls corresponding to the code the user wrote.