Hang in bash/zsh launched via Eclipse->TM Terminal

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Hi folks,

I need help debugging why /bin/bash, /bin/zsh would hang being launched by
Eclipse (v2020-09) -> TM Terminal (v10) -> (shell) on up-to-date Fedora 33.

I am using upstream build Eclipse 2020-09 and the TM Terminal plugin:

1. As root - no problem, TM Terminal can launch /bin/bash
2. As user - both /bin/bash and /bin/zsh hang, (bash at some pselect6() ) call and both do not reach the shell prompt. They are still responsive to SIGHUP.
3. As user - /bin/fish, /bin/sh, /bin/ksh, /bin/tmux(this launches /bin/bash inside)  - all work.

For /bin/bash specifically the hang seems to be here:
0x00007f6fcc10024b in pselect () from /lib64/libc.so.6
(gdb) bt
#0  0x00007f6fcc10024b in pselect () from /lib64/libc.so.6
#1  0x000055c978de88af in rl_getc ()
#2  0x000055c978de7b7c in rl_read_key ()
#3  0x000055c978dc8c4a in readline_internal_char ()
#4  0x000055c978dc97cd in readline ()
#5  0x000055c978d31f1f in yy_readline_get ()
#6  0x000055c978d33a29 in shell_getc.lto_priv ()
#7  0x000055c978d3632a in read_token.part ()
#8  0x000055c978d39c52 in yyparse ()
#9  0x000055c978d3d00b in parse_command ()
#10 0x000055c978d3d14d in read_command ()
#11 0x000055c978d3d415 in reader_loop ()
#12 0x000055c978d2f689 in main ()

For /bin/zsh:
(gdb) bt
#0  0x00007f16278953f2 in read () from /lib64/libc.so.6
#1  0x00007f16199570a6 in getbyte () from /usr/lib64/zsh/5.8/zsh/zle.so
#2  0x00007f16199579c1 in getkeymapcmd () from /usr/lib64/zsh/5.8/zsh/zle.so
#3  0x00007f161995a4bf in getkeycmd () from /usr/lib64/zsh/5.8/zsh/zle.so
#4  0x00007f161995d354 in zlecore () from /usr/lib64/zsh/5.8/zsh/zle.so
#5  0x00007f161995e0bc in zleread () from /usr/lib64/zsh/5.8/zsh/zle.so
#6  0x000055d18465fb78 in zleentry ()
#7  0x000055d18466044b in ingetc.part ()
#8  0x000055d184653657 in ihgetc ()
#9  0x000055d18466d956 in zshlex.part ()
#10 0x000055d184690b56 in parse_event ()
#11 0x000055d184659698 in loop ()
#12 0x000055d184661b4e in zsh_main ()
#13 0x000055d18460fd8b in main ()

Any suggestions to track down the issue would be appreciated.

SPChan


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