Inconsistent errors from exec.command.output()

[luoliwoshang]

When running the program with llgo, errors occur and they're different each time.

package main

import (
	"os/exec"
)

func decodeSymbolName(symbolName string) {
	println("decodeSymbolName", symbolName)
	cppfiltCmd := exec.Command("c++filt", symbolName)
	cppfiltOutput, err := cppfiltCmd.Output()
	if err != nil {
		println(err)
	}
	println(string(cppfiltOutput))
}

func main() {
	decodeSymbolName("__ZN9INIReaderC1EPKcm")
	decodeSymbolName("__ZN9INIReaderC1ERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE")
	decodeSymbolName("__ZN9INIReaderC2EPKcm")
}

llgo/_cmptest/_falsedemo on  llcppg/symg/header [$!?] via 🐹 v1.20.4 took 9s 
❯ llgo run .
decodeSymbolName __ZN9INIReaderC1EPKcm
INIReader::INIReader(char const*, unsigned long)

decodeSymbolName __ZN9INIReaderC1ERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE
INIReader::INIReader(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)

decodeSymbolName __ZN9INIReaderC2EPKcm
INIReader::INIReader(char const*, unsigned long)
(base) 

llgo/_cmptest/_falsedemo on  llcppg/symg/header [$!?] via 🐹 v1.20.4 took 2s 
❯ llgo run .
decodeSymbolName __ZN9INIReaderC1EPKcm
^C
(base) 

llgo/_cmptest/_falsedemo on  llcppg/symg/header [$!?] via 🐹 v1.20.4 took 5s 
❯ llgo run .
decodeSymbolName __ZN9INIReaderC1EPKcm
INIReader::INIReader(char const*, unsigned long)

decodeSymbolName __ZN9INIReaderC1ERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE
Unexpected state
Collecting from unknown thread
(base) 

The program runs normally when executed only once.

decodeSymbolName("__ZN9INIReaderC1EPKcm")
-decodeSymbolName("__ZN9INIReaderC1ERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE")
-decodeSymbolName("__ZN9INIReaderC2EPKcm")