2046410 - Weird signature [@ <T>]

Status: RESOLVED FIXED

(Socorro :: Signature, defect, P2)

Description

[Andrew McCreight [:mccr8]]

I came across this weird signature [@ <T>].

Is it turning <unknown in nvwgf2umx.dll> into <T>?

https://crash-stats.mozilla.org/report/index/3d152239-fcf7-4aed-9ade-143600260609

Comment 1

[Andrew McCreight [:mccr8]]

Huh, interesting. I searched for unknown on crash stats, which turned up this signature [@ <unknown in ntdll.pdb> ]. I clicked on the crash report and was wondering why it wasn't <T> and lo and behold the crash report has this note: "Signature generation has changed since this was processed. New signature would be: [@ <T> ]". So the <T> thing is a regression.

https://crash-stats.mozilla.org/report/index/ff7c1841-d815-4e24-90c6-d8d4a0260608

The most recent crash time I see is from June 8, so I guess this is a recent regression?
bp-8ba4e72d-3526-4db0-af2b-d162b0260608

Comment 2

[Bianca Danforth [:bdanforth]]

Thank you for this report! We can confirm that this bug is a regression from the signature generation change made in Bug 2031036. Haseeb will pick this up.

We should add test coverage for this case to get back to the old signature before the regressing bug landed.

Comment 3

[Haseeb Afzal]

Attachment: [mozilla-services/socorro] bug-2046410: added exception to get_type_replacement() (#7214Edit title)

Comment 4

[Haseeb Afzal]

smarnach merged PR [mozilla-services/socorro]: bug-2046410: added exception to get_type_replacement() (#7214Edit title) in 02708fd.

Comment 5

[Haseeb Afzal]

I have verified that this fix works as intended in stage.

Comment 6

[Sven Marnach :sven]

This was deployed to prod in https://github.com/mozilla-services/socorro/releases/tag/v2026.06.11-1.

I reprocessed https://crash-stats.mozilla.org/report/index/3d152239-fcf7-4aed-9ade-143600260609, and the signature looks better now.

We should reprocess all crash reports with the broken signature, and probably a few more for all the recent siggen updates.

Comment 7

[Haseeb Afzal]

The crash reports with the broken signature have been reprocessed.