Thanks for introducing me to bubblewrap. I tweaked your mc-bwrap script to
bind /etc/java-*-openjdk/amd64/jvm.cfg and symlink usr/lib to /lib64.
Without that, Minecraft doesn't start on my Arch Linux system.

I also fixed undefined environment variables like $RUN_USER, which I have
never seen before, and replaced some instances of `which` with `command -v`
for portability and performance (`which` is not a shell builtin).

I couldn't get X11 isolation to work, it immediately fails with

    Error: A JNI error has occurred, please check your installation and try again
    Exception in thread "main" 
    java.lang.UnsatisfiedLinkError: /usr/lib/jvm/java-8-openjdk/jre/lib/amd64/libnio.so: /usr/lib/jvm/java-8-openjdk/jre/lib/amd64/libnio.so: undefined symbol: NET_Bind, version SUNWprivate_1.1

---
This fixes the issues raised from the first patch.

 your-name | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 your-name

diff --git a/your-name b/your-name
new file mode 100644
index 0000000..66cb3d4
--- /dev/null
+++ b/your-name
@@ -0,0 +1 @@
+I have successfully used git send-email!
[message trimmed]

---
 your-name | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 your-name

diff --git a/your-name b/your-name
new file mode 100644
index 0000000..6d0ecfd
--- /dev/null
+++ b/your-name
@@ -0,0 +1 @@
+I'm about to try git send-email
--
2.28.0
[message trimmed]

---
 your-name | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 your-name

diff --git a/your-name b/your-name
new file mode 100644
index 0000000..6d0ecfd
--- /dev/null
+++ b/your-name
@@ -0,0 +1 @@
+I'm about to try git send-email
--
2.28.0
[message trimmed]