lixiangsanxun opened a new issue #2804: [iOS] iOS13 [WXTextComponent Dealloc] crash in 0.20.1 URL: https://github.com/apache/incubator-weex/issues/2804 ## Describe the bug <!-- A clear and concise description of what the bug is. --> iOS13 [WXTextComponent Dealloc] crash in 0.20.1. ## To Reproduce When weex page render，this crash happens occasionally. ## Environment <!-- * Device: [e.g. iPhone6] * OS: [e.g. iOS13] * Version [e.g. 20] * Build from source [e.g. yes/no] --> ## Additional context 0 UIKitCore | 0x000000019a8c3000 + 15067552 -- | -- 1 UIKitCore | 0x000000019a8c3000 + 15067444 2 WeexSDK | -[WXComponent .cxx_destruct] (WXComponent.mm:56) 3 libobjc.A.dylib | 0x0000000196fed000 + 20968 4 libobjc.A.dylib | objc_destructInstance + 88 5 libobjc.A.dylib | _objc_rootDealloc + 48 6 WeexSDK | -[WXComponent dealloc] (WXComponent.mm:272) 7 libsystem_blocks.dylib | _Block_release + 152 8 WeexSDK | __destroy_helper_block_e8_32s40s48s56s (WXAnimationModule.m:185) 9 libsystem_blocks.dylib | _Block_release + 152 10 libsystem_blocks.dylib | _Block_release + 152 11 libdispatch.dylib | 0x0000000196f3d000 + 373196 12 libdispatch.dylib | 0x0000000196f3d000 + 15196 13 libdispatch.dylib | 0x0000000196f3d000 + 12976 14 libdispatch.dylib | 0x0000000196f3d000 + 65680 15 libdispatch.dylib | 0x0000000196f3d000 + 67676 16 libsystem_pthread.dylib | _pthread_wqthread + 212
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