[flutter_inappwebview] Fix SIGTRAP on TV app teardown - #1084
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Aug 12, 2026
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- Fix a SIGTRAP/SIGSEGV crash during app teardown on TV targets: ewk_init()/ewk_shutdown() were both commented out, but chromium-efl requires them to be called exactly once per process.
- Add WebView::InitializeEngine()/ShutdownEngine(), called from the plugin's constructor/destructor. ShutdownEngine() waits (bounded, 2s) for all WebView instances to be disposed first, since ewk_shutdown() fatally CHECKs if any Ewk_View is still alive.
ewk_init() and ewk_shutdown() were both commented out, guessing that OS-level EFL init and SetArguments() made ewk_init() unnecessary. In practice chromium-efl needs ewk_init()/ewk_shutdown() called exactly once per process: without ewk_init(), some engine state assumed initialized elsewhere is never set up, and on TV targets this surfaces as a SIGTRAP/SIGSEGV during app teardown. Call ewk_init() once from the plugin's constructor and ewk_shutdown() once from its destructor, via new WebView::InitializeEngine()/ShutdownEngine() static helpers. ShutdownEngine() waits (bounded, 2s) for the live WebView instance set to drain first, since ewk_shutdown() fatally CHECKs if any Ewk_View is still alive; normal teardown order (platform views destroyed before the plugin) already guarantees this, so the wait is defensive only. Verified with 3 clean drive runs each on the TV emulator and a real TV device, with no crash and no crash dumps.
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