Bootstrapping stuck during handshaking at 14% when NSS is enabled

macOS 10.15.6

Bug was introduced in bc50f082.

Jul 01 08:58:35.000 [notice] Tor 0.4.5.0-alpha-dev (git-8f59b3e6f2a90881) opening log file.
Jul 01 08:58:35.751 [notice] Tor 0.4.5.0-alpha-dev (git-8f59b3e6f2a90881) running on Darwin with Libevent 2.1.11-stable, NSS 3.54, Zlib 1.2.11, Liblzma 5.2.5, and Libzstd 1.4.5.
Jul 01 08:58:35.751 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning
Jul 01 08:58:35.751 [notice] This version is not a stable Tor release. Expect more bugs than usual.
Jul 01 08:58:35.751 [notice] Tor is running with Rust integration. Please report any bugs you encounter.
Jul 01 08:58:35.753 [notice] Read configuration file "/usr/local/etc/tor/torrc".
Jul 01 08:58:35.758 [notice] Opening Socks listener on 127.0.0.1:9050
Jul 01 08:58:35.758 [notice] Opened Socks listener on 127.0.0.1:9050
Jul 01 08:58:35.758 [notice] Opening Control listener on 127.0.0.1:9051
Jul 01 08:58:35.758 [notice] Opened Control listener on 127.0.0.1:9051
Jul 01 08:58:35.000 [notice] Parsing GEOIP IPv4 file /usr/local/share/tor/geoip.
Jul 01 08:58:35.000 [notice] Parsing GEOIP IPv6 file /usr/local/share/tor/geoip6.
Jul 01 08:58:36.000 [notice] Bootstrapped 0% (starting): Starting
Jul 01 08:58:36.000 [notice] Starting with guard context "default"
Jul 01 08:58:36.000 [notice] Bootstrapped 5% (conn): Connecting to a relay
Jul 01 08:58:36.000 [notice] Bootstrapped 10% (conn_done): Connected to a relay
Jul 01 08:58:36.000 [notice] Bootstrapped 14% (handshake): Handshaking with a relay

Previous commit 2eae59e4 does not have this bug.

Jul 01 09:01:30.000 [notice] Tor 0.4.5.0-alpha-dev (git-2eae59e475168c30) opening log file.
Jul 01 09:01:30.080 [notice] Tor 0.4.5.0-alpha-dev (git-2eae59e475168c30) running on Darwin with Libevent 2.1.11-stable, NSS 3.54, Zlib 1.2.11, Liblzma 5.2.5, and Libzstd 1.4.5.
Jul 01 09:01:30.080 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning
Jul 01 09:01:30.080 [notice] This version is not a stable Tor release. Expect more bugs than usual.
Jul 01 09:01:30.080 [notice] Tor is running with Rust integration. Please report any bugs you encounter.
Jul 01 09:01:30.080 [notice] Read configuration file "/usr/local/etc/tor/torrc".
Jul 01 09:01:30.083 [notice] Opening Socks listener on 127.0.0.1:9050
Jul 01 09:01:30.083 [notice] Opened Socks listener on 127.0.0.1:9050
Jul 01 09:01:30.083 [notice] Opening Control listener on 127.0.0.1:9051
Jul 01 09:01:30.083 [notice] Opened Control listener on 127.0.0.1:9051
Jul 01 09:01:30.000 [notice] Parsing GEOIP IPv4 file /usr/local/share/tor/geoip.
Jul 01 09:01:30.000 [notice] Parsing GEOIP IPv6 file /usr/local/share/tor/geoip6.
Jul 01 09:01:30.000 [notice] Bootstrapped 0% (starting): Starting
Jul 01 09:01:30.000 [notice] Starting with guard context "default"
Jul 01 09:01:30.000 [notice] Bootstrapped 5% (conn): Connecting to a relay
Jul 01 09:01:30.000 [notice] Bootstrapped 10% (conn_done): Connected to a relay
Jul 01 09:01:30.000 [notice] Bootstrapped 14% (handshake): Handshaking with a relay
Jul 01 09:01:31.000 [notice] Bootstrapped 15% (handshake_done): Handshake with a relay done
Jul 01 09:01:31.000 [notice] Bootstrapped 75% (enough_dirinfo): Loaded enough directory info to build circuits
Jul 01 09:01:31.000 [notice] Bootstrapped 90% (ap_handshake_done): Handshake finished with a relay to build circuits
Jul 01 09:01:31.000 [notice] Bootstrapped 95% (circuit_create): Establishing a Tor circuit
Jul 01 09:01:31.000 [notice] Bootstrapped 100% (done): Done