fix(android): Preserve custom Throwable identities - #5881
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Co-Authored-By: Roman Zavarnitsyn <roman.zavarnitsyn@sentry.io>
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romtsn
marked this pull request as ready for review
July 31, 2026 07:58
romtsn
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0xadam-brown,
adinauer,
markushi,
romtsn and
runningcode
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July 31, 2026 07:58
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Performance metrics 🚀
|
| Revision | Plain | With Sentry | Diff |
|---|---|---|---|
| d15471f | 303.49 ms | 439.08 ms | 135.59 ms |
| b750b96 | 408.98 ms | 480.32 ms | 71.34 ms |
| 17a0955 | 372.53 ms | 446.70 ms | 74.17 ms |
| d217708 | 355.34 ms | 381.39 ms | 26.05 ms |
| 5b1a06b | 310.56 ms | 362.79 ms | 52.22 ms |
| fcec2f2 | 311.35 ms | 384.94 ms | 73.59 ms |
| 62b579c | 349.26 ms | 426.26 ms | 77.00 ms |
| 5f14e5d | 325.76 ms | 368.32 ms | 42.56 ms |
| 48277cd | 320.38 ms | 379.90 ms | 59.52 ms |
| a416a65 | 295.53 ms | 373.74 ms | 78.21 ms |
App size
| Revision | Plain | With Sentry | Diff |
|---|---|---|---|
| d15471f | 1.58 MiB | 2.13 MiB | 559.54 KiB |
| b750b96 | 1.58 MiB | 2.10 MiB | 533.19 KiB |
| 17a0955 | 1.58 MiB | 2.10 MiB | 533.20 KiB |
| d217708 | 1.58 MiB | 2.10 MiB | 532.97 KiB |
| 5b1a06b | 0 B | 0 B | 0 B |
| fcec2f2 | 1.58 MiB | 2.12 MiB | 551.51 KiB |
| 62b579c | 0 B | 0 B | 0 B |
| 5f14e5d | 1.58 MiB | 2.19 MiB | 620.00 KiB |
| 48277cd | 0 B | 0 B | 0 B |
| a416a65 | 1.58 MiB | 2.12 MiB | 555.26 KiB |
markushi
reviewed
Jul 31, 2026
runningcode
approved these changes
Aug 4, 2026
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Prevent R8 horizontal class merging from collapsing unrelated custom
Throwablesubclasses into one runtime type. This keeps captured exception types aligned with retraced constructor frames and avoids incorrect issue titles or grouping.Consumer ProGuard rule
sentry-android-corenow exports a broad rule that preserves distinct throwable class identities while still allowing unused classes to be removed and retained classes to be obfuscated:The rule follows the mitigation recommended by the R8 maintainers.
Requested by Roman Zavarnitsyn.
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