plugin: do not leak cRelName on error path
plugin: do not leak cRelName on error path

Fixes #17683

Change-Id: I46f45c63796b58e8a8f14e37592231cbe7cd6934
Reviewed-on: https://go-review.googlesource.com/32438
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

derekmarcotte/go,josharian/go,linux-on-ibm-z/go,josharian/go,goodlang/good,polyverse-security/go,golang/go,polyverse-security/go,akutz/go,polyverse-security/go,ImJasonH/go,polyverse-security/go,cloudflare/go,derekmarcotte/go,Cofyc/go,golang/go,CAFxX/go,cloudflare/go,josharian/go,polyverse-security/go,nawawi/go,vsekhar/elastic-go,polyverse-security/go,cloudflare/go,suncycheng/go,CAFxX/go,akutz/go,vsekhar/elastic-go,akutz/go,Cofyc/go,codestation/go,vsekhar/elastic-go,suncycheng/go,ImJasonH/go,akutz/go,ImJasonH/go,ImJasonH/go,golang/go,vsekhar/elastic-go,vsekhar/elastic-go,josharian/go,linux-on-ibm-z/go,CAFxX/go,polyverse-security/go,akutz/go,linux-on-ibm-z/go,josharian/go,Cofyc/go,nawawi/go,akutz/go,ImJasonH/go,codestation/go,Cofyc/go,cloudflare/go,ImJasonH/go,vsekhar/elastic-go,codestation/go,nawawi/go,CAFxX/go,josharian/go,Cofyc/go,goodlang/good,ImJasonH/go,codestation/go,codestation/go,ImJasonH/go,goodlang/good,golang/go,josharian/go,nawawi/go,nawawi/go,suncycheng/go,akutz/go,cloudflare/go,linux-on-ibm-z/go,nawawi/go,vsekhar/elastic-go,derekmarcotte/go,derekmarcotte/go,goodlang/good,suncycheng/go,CAFxX/go,golang/go,derekmarcotte/go,goodlang/good,linux-on-ibm-z/go,goodlang/good,linux-on-ibm-z/go,golang/go,derekmarcotte/go,CAFxX/go,cloudflare/go,linux-on-ibm-z/go,cloudflare/go,CAFxX/go,akutz/go,CAFxX/go,nawawi/go,cloudflare/go,derekmarcotte/go,Cofyc/go,Cofyc/go,golang/go,goodlang/good,goodlang/good,golang/go,christopher-henderson/Go,codestation/go,suncycheng/go,suncycheng/go,Cofyc/go,derekmarcotte/go,suncycheng/go,codestation/go,nawawi/go,linux-on-ibm-z/go,vsekhar/elastic-go,josharian/go,suncycheng/go,polyverse-security/go,codestation/go