Rust 1.19 regression, bugsnag 0.1.3

[brson]

https://github.com/superscale/bugsnag-rs

commit 0dcd12904dddba34280cc9dfe1eb4cb62dfe179f
Merge: d48b49e 132e53f
Author: bkchr <bkchr@users.noreply.github.com>
Date:   Thu Mar 30 10:19:38 2017 +0200

    Merge pull request #1 from superscale/improved_stacktrace_filtering

    Changes the filtering while creating the stacktrace

101 brian@ip-10-145-43-250:~/dev/bugsnag-rs⟫ cargo +nightly test
    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
     Running target/debug/deps/bugsnag-70e001eda811897f

running 19 tests
test appinfo::tests::test_appinfo_with_release_stage_to_json ... ok
test appinfo::tests::test_appinfo_to_json ... ok
test appinfo::tests::test_appinfo_with_type_to_json ... ok
test bugsnag_impl::tests::test_error_to_json ... ok
test bugsnag_impl::tests::test_info_to_json ... ok
test appinfo::tests::test_appinfo_with_version_to_json ... ok
test bugsnag_impl::tests::test_warning_to_json ... ok
test deviceinfo::tests::test_deviceinfo_to_json ... ok
test event::tests::test_event_to_json ... ok
test event::tests::test_event_with_app_info_to_json ... ok
test event::tests::test_event_with_context_to_json ... ok
test notification::tests::test_notification_to_json ... ok
test bugsnag_impl::tests::test_get_project_dir ... ok
test exception::tests::test_exception_to_json ... ok
test deviceinfo::tests::test_deviceinfo_to_json_with_set ... ok
test notification::tests::test_notification_with_event_to_json ... ok
test stacktrace::tests::test_frame_to_json ... ok
test stacktrace::tests::test_create_stacktrace_with_ignore ... ok
test stacktrace::tests::test_create_stacktrace ... FAILED

failures:

---- stacktrace::tests::test_create_stacktrace stdout ----
        thread 'stacktrace::tests::test_create_stacktrace' panicked at 'assertion failed: found_frame', src/stacktrace.rs:97
note: Run with `RUST_BACKTRACE=1` for a backtrace.


failures:
    stacktrace::tests::test_create_stacktrace

test result: FAILED. 18 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out

error: test failed, to rerun pass '--lib'

brian@ip-10-145-43-250:/mnt2/dev⟫ rustc +nightly -Vv
rustc 1.19.0-nightly (0418fa9d3 2017-06-04)
binary: rustc
commit-hash: 0418fa9d382a47d782cc1e195c14573be9c32095
commit-date: 2017-06-04
host: x86_64-unknown-linux-gnu
release: 1.19.0-nightly
LLVM version: 4.0

[brson]

cc @superscale

[Mark-Simulacrum]

Bisected to 2971d49 -- #41508; I think this might be intentional breaking changes, since the test looks like it depends on somewhat internal information, but unsure. https://github.com/superscale/bugsnag-rs/blob/master/src/stacktrace.rs#L80

[brson]

@mw does this breakage look expected per the linked PR?

[nagisa]

Intended breakage. The crate runs:

let frames = create_stacktrace(&|file, _| file.starts_with(env!("CARGO_MANIFEST_DIR")));

The code within closure calculates the frame.in_project boolean. Since after the linked change debug info intentionally does not put absolute paths into the debug info anymore, this check can never become true. This latter skips this code:

if frame.in_project {
    found_frame = true;
    break;
}

and triggers the assert!(found_frame).