MalformedDER error from CertificateChain.from_pem

[lonjil]

With this PEM file and the following code, I get a MalformedDER error.

var reader = std.io.fixedBufferStream(
    @embedFile("/etc/ssl/certs/ca-certificates.crt"),
).reader();
const trust = try tls.x509.CertificateChain.from_pem(alloc, reader);

Tell me if you want/need any other information.