Windows programs fail to start when invoked under tmux

[pingzing]

• Your Windows build number: (Type ver at a Windows Command Prompt)
  Microsoft Windows [Version 10.0.15063]

• What you're doing and what's happening: (Copy&paste specific commands and their output, or include screen shots)
  For a simple example, trying to open notepad from WSL, while in a tmux session e.g.

C:\WINDOWS\system32> bash
pingzing@BEHEMOTH:/mnt/c/Windows/System32$ tmux
pingzing@BEHEMOTH:/mnt/c/Windows/System32$ notepad.exe

After entering notepad.exe, the session hangs indefinitely until force-quit with Ctrl + C. This is not an issue when running outside of tmux.

• What's wrong / what should be happening instead:
  Notepad (or any other .exe) should open.

• Strace of the failing command, if applicable: (If <cmd> is failing, then run strace -o strace.txt -ff <cmd>, and post the strace.txt output here)

pingzing@BEHEMOTH:/mnt/c/Windows/System32$ strace notepad.exe
execve("/mnt/c/Windows/System32/notepad.exe", ["notepad.exe"], [/* 18 vars */]) = 0
brk(NULL) = 0x7fffc14e3000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f76d5f00000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=21089, ...}) = 0
mmap(NULL, 21089, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f76d5efa000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967392, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f76d5830000
mprotect(0x7f76d59ef000, 2097152, PROT_NONE) = 0
mmap(0x7f76d5bef000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7f76d5bef000
mmap(0x7f76d5bf5000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f76d5bf5000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f76d5ef0000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f76d5ee0000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f76d5ed0000
arch_prctl(ARCH_SET_FS, 0x7f76d5ee0700) = 0
mprotect(0x7f76d5bef000, 16384, PROT_READ) = 0
mprotect(0x7f76d6209000, 4096, PROT_READ) = 0
mprotect(0x7f76d5e25000, 4096, PROT_READ) = 0
munmap(0x7f76d5efa000, 21089) = 0
getpid() = 13469
brk(NULL) = 0x7fffc14e3000
brk(0x7fffc1504000) = 0x7fffc1504000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1668976, ...}) = 0
mmap(NULL, 1668976, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f76d5c8d000
close(3) = 0
getcwd("/mnt/c/Windows/System32", 4096) = 24
open("/dev/lxssclient", O_RDWR) = 3
ioctl(3, _IOC(0, 0x00, 0x2f, 0x22)

[benhillis]

I can't seem to reproduce this locally. Would you be willing to take a trace?

1. Download the below two .txt files and rename them .cmd
2. Run start_lxcore_trace.cmd from an admin command prompt
3. Perform the repro
4. Run stop_lxcore_trace.cmd from an admin command prompt
5. You should now see three .etl files in the directory where you ran the script
6. Post the logs here.

https://github.com/Microsoft/BashOnWindows/files/288621/start_lxcore_trace.txt
https://github.com/Microsoft/BashOnWindows/files/288622/stop_lxcore_trace.txt

[pingzing]

Hm. Now that I'm trying to reproduce it for the strace, I'm unable to. I suppose I just got into some kind of transient bad state that's fixed now?

All's well that ends well, I guess. /shrug

Thanks for your time!

[mateuszlewko]

I had the same issue but system restart resolved it.