Option Soup: the subtle pitfalls of combining compiler flags

**Option Soup: the subtle pitfalls of combining compiler flags**

Firefox development uncovers many cross-platform differences and unique features of its combination of dependencies. Engineers working on Firefox regularly overcome these challenges and while we can’t detail all of them, we think you’ll enjoy hearing about some so here’s a sample of a recent technical investigation. During the Firefox 120 beta cycle, a new crash signature appeared on our radars with significant volume. At that time, the distribution across operating systems revealed that more than 50% of the crash volume originates from Ubuntu 18.04 LTS users. The main process crashes in a CanvasRenderer thread, with the following call stack: 0 firefox std::locale::operator= 1 firefox std::ios_base::imbue 2 firefox std::basic_ios<char, std::char_traits<char> >::imbue 3 libxul.so sh::InitializeStream<std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> > > /build/firefox-ZwAdKm/firefox-120.0~b2+build1/gfx/angle/checkout/src/compiler/translator/Common.h:238 3 libxul.so sh::TCompiler::setResourceString /build/firefox-ZwAdKm/firefox-120.0~b2+build1/gfx/angle/checkout/src/compiler/translator/Compiler.cpp:1294 4 libxul.so sh::TCompiler::Init /build/firefox-ZwAdKm/firefox-120.0~b2+build1/gfx/angle/checkout/src/compiler/translator/Compiler.cpp:407 5 libxul.so sh::ConstructCompiler /build/firefox-ZwAdKm/firefox-120.0~b2+build1/gfx/angle/checkout/src/compiler/translator/ShaderLang.cpp:368 6 libxul.so mozilla::webgl::ShaderValidator::Create /build/firefox-ZwAdKm/firefox-120.0~b2+build1/dom/canvas/WebGLShaderValidator.cpp:215 6 libxul.so mozilla::WebGLContext::CreateShaderValidator const /build/firefox-ZwAdKm/firefox-120.0~b2+build1/dom/canvas/WebGLShaderValidator.cpp:196 7 libxul.so mozilla::WebGLShader::CompileShader /build/firefox-ZwAdKm/firefox-120.0~b2+build1/dom/canvas/WebGLShader.cpp:98 At first glance, we want to blame WebGL...

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**[devsupporter 해설]**

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