commit 286f68524e2f32afdbf43a3a9ed2cb5e0b647fd0
from: rsc <devnull@localhost>
date: Fri May 12 20:52:12 2006 UTC

avoid zombie when execvp fails

commit - d7f59903e3c1fbb68ef934abcb5ac36f0dcdfbeb
commit + 286f68524e2f32afdbf43a3a9ed2cb5e0b647fd0
blob - d745248824f4c9a9051637520361866ec5617c8a
blob + a6d536ec1b085f72b7471cad526e6b549cd742f6
--- src/libthread/exec.c
+++ src/libthread/exec.c
@@ -93,6 +93,7 @@ _threadspawn(int fd[3], char *cmd, char *argv[])
 	n = read(p[0], exitstr, sizeof exitstr-1);
 	close(p[0]);
 	if(n > 0){	/* exec failed */
+		free(waitfor(pid));
 		exitstr[n] = 0;
 		errno = atoi(exitstr);
 		return -1;