Background process with high CPU usage

[benwaffle]

• nvim --version:

NVIM 0.1.6
Build type: RelWithDebInfo
Compilation: /usr/bin/cc -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -Wconversion -O2 -g -DDISABLE_LOG -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wvla -fstack-protector-strong -fdiagnostics-color=auto -DINCLUDE_GENERATED_DECLARATIONS -DHAVE_CONFIG_H -D_GNU_SOURCE -I/build/neovim/src/build/config -I/build/neovim/src/neovim-0.1.6/src -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/build/neovim/src/build/src/nvim/auto -I/build/neovim/src/build/include
Compiled by builduser

Optional features included (+) or not (-): +acl   +iconv    +jemalloc +tui      
For differences from Vim, see :help vim-differences

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/share/nvim"

• Operating system/version: Linux 4.8.6, Arch

Actual behaviour

The process is running in the background, at 100% cpu usage, without a terminal. I believe I closed the terminal while a paste was in progress (ctrl-shift-v in insert mode, not "+p). The orphaned process was reparented to PID1

Expected behaviour

nvim quits when you close the terminal

Steps to reproduce using nvim -u NORC

Copy a large file, paste it in (ctrl-shift-v), and close your terminal while it's pasting. Unfortunately, I can't reproduce.

I ran perf record before I killed the process: perf.zip. You can unzip the file and run perf report to see the data. tl;dr input_enqueue and rbuffer_get take up all of the time

[justinmk]

Thanks for the thorough report!

Could be helped by #4448.

nvim quits when you close the terminal

Nvim calls preserve_exit() on SIGHUP, setting got_int and mapped_ctrl_c=0 in there may avoid this issue.