43 lines
1.6 KiB
Rust
43 lines
1.6 KiB
Rust
// Backtraces in internal compiler errors used to be unbearably long, spanning
|
|
// multiple hundreds of lines. A fix was pushed in #108938, and this test gathers
|
|
// varied metrics on level 1 and full-level backtraces to check that the output
|
|
// was shortened down to an appropriate length.
|
|
// See https://github.com/rust-lang/rust/issues/107910
|
|
|
|
//@ ignore-windows
|
|
// Reason: the assert_eq! on line 32 fails, as error output on Windows is different.
|
|
|
|
use run_make_support::rustc;
|
|
|
|
fn main() {
|
|
let rust_test_1 =
|
|
rustc().set_backtrace_level("1").input("src/lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
|
|
let rust_test_2 = rustc()
|
|
.set_backtrace_level("full")
|
|
.input("src/lib.rs")
|
|
.arg("-Ztreat-err-as-bug=1")
|
|
.run_fail();
|
|
|
|
let mut rust_test_log_1 = rust_test_1.stderr_utf8();
|
|
rust_test_log_1.push_str(&rust_test_1.stdout_utf8());
|
|
let rust_test_log_1 = rust_test_log_1.as_str();
|
|
|
|
let mut rust_test_log_2 = rust_test_2.stderr_utf8();
|
|
rust_test_log_2.push_str(&rust_test_2.stdout_utf8());
|
|
let rust_test_log_2 = rust_test_log_2.as_str();
|
|
|
|
let rustc_query_count_full = count_lines_with(rust_test_log_2, "rustc_query_");
|
|
|
|
assert!(rust_test_log_1.lines().count() < rust_test_log_2.lines().count());
|
|
assert_eq!(
|
|
count_lines_with(rust_test_log_2, "__rust_begin_short_backtrace"),
|
|
count_lines_with(rust_test_log_2, "__rust_end_short_backtrace")
|
|
);
|
|
assert!(count_lines_with(rust_test_log_1, "rustc_query_") + 5 < rustc_query_count_full);
|
|
assert!(rustc_query_count_full > 5);
|
|
}
|
|
|
|
fn count_lines_with(s: &str, search: &str) -> usize {
|
|
s.lines().filter(|l| l.contains(search)).count()
|
|
}
|