Here is the text I see in the log:
16:38:30 bib Reported exception thrown!
f: Updating screen events_
at bib.t(SourceFile:1635)
at bib.az(SourceFile:1000)
at bib.a(SourceFile:419)
at net.minecraft.client.main.Main.main(SourceFile:123)
Caused by: java.lang.RuntimeException: Failed to check session lock, aborting
at bfb.i(SourceFile:64)
at bfb.<init>(SourceFile:50)
at bey.<init>(SourceFile:21)
at bez.a(SourceFile:84)
at bib.a(SourceFile:2159)
at boi.a(Sou_rceFile:212)
at blk.a(SourceFile:337)
at boi.a(SourceFile:352)
at blk.k(SourceFile:400)
at blk.q(SourceFile:377)
at bib.t(SourceFile:1625)
... 3 more
The environment is supposed to only contain computer details.
Don’t mark issues as private unless it exposes a security issue, or contains information about you (like your e mail adress).
If it crashes, it may be a good idea to attach the so called “crash report”. 🙂 You can find it in your minecraft directory.