pygit error: _pygit2.GitError: $hash: error inflating zlib stream [reproducer included!]

[rralf]

Hi,

This is my environment (Arch Linux, latest packages):

pygit2: 1.5.0
libgit2: 1.1
Python 3.9.4
zlib 1.2.11

Consider this reproducer:

#!/usr/bin/env python3

import pygit2

repo = pygit2.Repository('.') # Use this repo: $ git clone https://lore.kernel.org/netdev/0

commit = repo['7c260769a628415a753e77d16b56900c5df3a5c8']
tree = commit.tree
blob_hash = commit.tree['m'].hex
data = repo[blob_hash].data

I constantly receive the following error message:

Traceback (most recent call last): File "[...]./test.py", line 10, in data = repo[blob_hash].data File "/usr/lib/python3.9/site-packages/pygit2/repository.py", line 208, in getitem value = self.git_object_lookup_prefix(key) _pygit2.GitError: 7898ba1260cad632beada434f011b2c3a7a4c3f5: error inflating zlib stream

Any suggestions?

Thanks in advance!

[Enselic]

I can reproduce. Did you try to reproduce with pure libgit2 though? Seems to me like this is reproducible in pure C, which would make this bug unrelated to the pygit2 bindings.

[rralf]

#include <git2.h>
#include <stdio.h>

int main(void)
{
        git_repository *repo = NULL;
        git_tree_entry *entry = NULL;
        git_commit *commit = NULL;
        git_tree *tree = NULL;
        git_blob *blob = NULL;
        const git_error *e;
        git_oid oid;
        int error;

        git_libgit2_init();

        error = git_repository_open(&repo, ".");
        if (error)
                goto err;

        error = git_oid_fromstr(&oid, "7c260769a628415a753e77d16b56900c5df3a5c8");
        if (error)
                goto err;

        error = git_commit_lookup(&commit, repo, &oid);
        if (error)
                goto err;

        error = git_commit_tree(&tree, commit);
        if (error)
                goto err;

        error = git_tree_entry_bypath(&entry, tree, "m");
        if (error)
                goto err;

        if (git_tree_entry_type(entry) != GIT_OBJECT_BLOB)
                goto err;

        error = git_blob_lookup(&blob, repo, git_tree_entry_id(entry));
        if (error)
                goto err;

        git_tree_entry_free(entry);
        puts(git_blob_rawcontent(blob));

        return 0;
err:
        e = git_error_last();
        printf("Error %d/%d: %s\n", error, e->klass, e->message);
        return error;
}

$ gcc -ggdb -O0 test.c -o test -lgit2 -Wall -Wextra && ./test
Error -1/5: error inflating zlib stream

Narf. I'll report it over there. I guess we can close this for the moment. Thanks.

[rralf]

Check out the bug report on libgit2: https://github.com/libgit2/libgit2/issues/5899