index-pack: fix race condition with duplicate bases

diff --git a/prompt.c b/prompt.c
index d851807feb9849813635471d7099e67ed743a2d7..d7bb17cb663c2f47ad59d34ecea17c6cc977e815 100644 (file)
--- a/prompt.c
+++ b/prompt.c
@@ -22,6 +22,7 @@ static char *do_askpass(const char *cmd, const char *prompt)
        if (start_command(&pass))
                return NULL;
 
+       strbuf_reset(&buffer);
        if (strbuf_read(&buffer, pass.out, 20) < 0)
                err = 1;
 
@@ -38,7 +39,7 @@ static char *do_askpass(const char *cmd, const char *prompt)
 
        strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));
 
-       return strbuf_detach(&buffer, NULL);
+       return buffer.buf;
 }
 
 char *git_prompt(const char *prompt, int flags)