regex – Go regular expression

is there a go regular expression that matches the repeated consecutive substring in a string?
for example:
if input = “ababcdefghfghfghrrrrrm”
the regular expression must match the following cases:
abab
fghfghfgh
rrrrr

I tried this regex (\w+)\1+ but I got an error messge in vscode. any equivelent regex in go?

This is the error message:error parsing regexp: invalid escape sequence: \1 (SA1000)

when I ran the code, it also gives error:
panic: regexp: Compile((\w+)\1+): error parsing regexp: invalid escape sequence: \1

goroutine 1 [running]:
regexp.MustCompile({0x4cfcc4, 0x8})
/home/linuxbrew/.linuxbrew/Cellar/go/1.22.1/libexec/src/regexp/regexp.go:317 +0xb4
art/functions.RepeatedSubstrings({0x7ffe5b7eec56, 0x16})