root@36e7be3c11c2:/empty-args-test# swift run Building for debugging... [10/10] Linking App Build complete! (0.41s) 😈 use 'setenv' in static constructor a.cpp: ***GRABBING ARGV for 6756*** a.cpp: envp = 0xaaaaf3b8a940 a.cpp: envp = 0xaaaaf3b8a940, stack is from 0xffffd25d0000 to 0xffffd25f1000 ARGV is at (nil) with count 0 // ←自前実装のArgvGrabberは壊れてる a.cpp: ***ARGV GRABBED*** Hello, World! CommandLine.arguments: [".build/aarch64-unknown-linux-gnu/debug/App"]　// ←SwiftStdLibのほうはうまく動いてる