Re: (Mosty harmless) protocol error when pushing

[Jeff King <peff@peff.net>]

On Tue, May 25, 2010 at 08:51:34AM +0200, Björn Gustavsson wrote:

> I am not sure whether this has been reported before.
> I follow this mailing list, but I don't read all emails in
> detail, so I could have missed a bug report or a fix
> for the problem.

I haven't seen it before, and I do read most of the emails (OK, I skip
some of the boring ones. :) ).

> Counting objects: 270, done.
> Delta compression using up to 8 threads.
> Compressing objects: 100% (71/71), done.
> Writing objects: 100% (184/184), 151.33 KiB, done.
> Total 184 (delta 157), reused 134 (delta 113)
> Auto packing the repository for optimum performance.
> fatal: protocol error: bad line length character: Remo
> error: error in sideband demultiplexer
> To git@github.com:bjorng/otp.git
>  + 7651a63...874192d bg/nif_error -> bg/nif_error (forced update)
> error: failed to push some refs to 'git@github.com:bjorng/otp.git'

I wasn't able to reproduce here, but I wonder if this would help
(more or less a cut-and-paste from the hook-running code in
receive-pack):

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index bb34757..c0a6a3b 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -843,7 +843,20 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
 			const char *argv_gc_auto[] = {
 				"gc", "--auto", "--quiet", NULL,
 			};
-			run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
+			struct child_process proc;
+
+			memset(&proc, 0, sizeof(proc));
+			proc.no_stdin = 1;
+			proc.stdout_to_stderr = 1;
+			proc.err = use_sideband ? -1 : 0;
+			proc.git_cmd = 1;
+			proc.argv = argv_gc_auto;
+
+			if (!start_command(&proc)) {
+				if (use_sideband)
+					copy_to_sideband(proc.err, -1, NULL);
+				finish_command(&proc);
+			}
 		}
 		if (auto_update_server_info)
 			update_server_info(0);

Unfortunately I can't actually test it. :)

-Peff