{"record":{"id":"e9e542a0382521e5","repo":"apache/beam","slug":"can-t-initialize-symbol-resolver","errorCode":null,"errorMessage":"Can't initialize symbol resolver.","messagePattern":"Can't initialize symbol resolver\\.","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"sdks/go/cmd/symtab/main.go","lineNumber":62,"sourceCode":"\nfunc init() {\n\t// Registers function in symbol table.\n\tIncrement(\"adding increment function to symbol table\")\n\tt = reflect.FuncOf([]reflect.Type{reflect.TypeOf(arg)}, []reflect.Type{}, false)\n\n\tvar err error\n\t// First try the Linux location, since it's the most reliable.\n\tsymbolTable, err = symtab.New(\"/proc/self/exe\")\n\tif err == nil {\n\t\treturn\n\t}\n\t// For other OS's this works in most cases we need. If it doesn't, log\n\t// an error and keep going.\n\tsymbolTable, err = symtab.New(os.Args[0])\n\tif err == nil {\n\t\treturn\n\t}\n\tpanic(\"Can't initialize symbol resolver.\")\n}\n\nfunc main() {\n\t// Translates function symbol to address.\n\taddr, err := symbolTable.Sym2Addr(name)\n\tif err != nil {\n\t\tlog.Fatalf(\"error translating function name to address: %v\", err)\n\t\treturn\n\t}\n\n\t// Restarts counter and calls increment function by its address.\n\tcounter = 0\n\tret, err := funcx.New(reflectx.MakeFunc(reflectx.LoadFunction(addr, t)))\n\tif err != nil {\n\t\tlog.Fatalf(\"error creating function out of address\")\n\t\treturn\n\t}\n\tret.Fn.Call([]any{arg})","sourceCodeStart":44,"sourceCodeEnd":80,"githubUrl":"https://github.com/apache/beam/blob/12126d8942aaf848030c478b4c6a28c6af861c66/sdks/go/cmd/symtab/main.go#L44-L80","documentation":"The symtab command initializes a symbol table from the executable itself (os.Args[0]) via the symtab package during package init. If symtab.New fails (e.g. the binary or its debug info cannot be parsed/resolved), the init panics with 'Can't initialize symbol resolver.'","triggerScenarios":"Running the symtab binary in an environment where symtab.New(os.Args[0]) returns an error — the executable path is unavailable, renamed, or its symbol/debug data cannot be read.","commonSituations":"Invoking the tool via a stripped binary or symlink whose ELF lacks symbol tables; running in a container where os.Args[0] is not resolvable; cross-compiled or stripped binaries.","solutions":["Run the tool against an unstripped binary containing symbol/debug information","Check os.Args[0] resolution — invoke the tool via an absolute path","Keep the error before the panic (the package logs it) and read that message for the underlying cause","Modify init to return the error gracefully instead of panicking, if you control the code"],"exampleFix":"// before\nif err == nil {\n\treturn\n}\npanic(\"Can't initialize symbol resolver.\")\n// after\nif err == nil {\n\treturn\n}\nlog.Fatalf(\"Can't initialize symbol resolver: %v\", err)","handlingStrategy":"try-catch","validationCode":"if _, err := os.Stat(os.Args[0]); err != nil {\n\tlog.Fatalf(\"executable not resolvable: %v\", err)\n}","typeGuard":null,"tryCatchPattern":"func safeSymtab() (st *symtab.SymbolTable, err error) {\n\tdefer func() {\n\t\tif r := recover(); r != nil {\n\t\t\terr = fmt.Errorf(\"symbol resolver init failed: %v\", r)\n\t\t}\n\t}()\n\treturn symtab.New(os.Args[0])\n}","preventionTips":["Run symtab on an unstripped binary","Invoke via absolute path so os.Args[0] resolves","Log the underlying symtab.New error before panicking"],"tags":["go","apache-beam","cli","panic","symbols"],"backgroundTag":"module-init-failed","analyzedSha":"12126d8942aaf848030c478b4c6a28c6af861c66","analyzedAt":"2026-09-13T01:50:10.254Z","contentChangedAt":"2026-09-13T01:50:10.254Z","schemaVersion":2},"datasetVersion":"2026-09-20T03:17:13.778Z"}