A crash report captured throwable.stackTraceToString() verbatim, so mail/network
exceptions (Jakarta Mail, java.net) could embed server host:port tokens and account
emails/usernames in the report's stackTrace field — violating the PII-free-reports
constraint. Add StackTraceScrubber, applied in DiagnosticsCollector before the trace
enters toSubmissionPayload()/toStorageJson(): it keeps the non-PII value (exception
class names + every frame's class/method/file/line) and drops each header line's
free-text message (where hostnames/usernames live), then redacts any residual email
or host:port left on a wrapped continuation line. Frame lines are untouched, so a
frame's File.kt:42 is never mistaken for a host:port.
ReportStore did MutableStateFlow(scan()) in its constructor — a dir list + read +
JSON-parse of every stored report. As an eager @Singleton dep of CrashReporter, whose
install() runs on the MAIN thread in Application.onCreate(), this was main-thread disk
I/O that grows with the 30-day retention. Seed the flow empty and dispatch the initial
scan to an injectable scope (Dispatchers.IO by default); reactive consumers update when
it lands, and writes still re-scan synchronously so a crash-time save is never lost.
Tests: StackTraceScrubberTest (host/ip/port/email dropped from a ConnectException +
auth-failure trace while classes/frames survive; regex redaction of a continuation
line; null-message trace preserved verbatim); DiagnosticsCollector end-to-end scrub
test; ReportStore empty-seed + off-thread populate via a StandardTestDispatcher. Store
constructions in existing tests use an Unconfined scope to keep their synchronous
reopen semantics.
Closes#294Closes#296
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jason Ross
JMR-devandClaude Opus 4.8