LanguageClient#textDocument_references timeouts on FreeBSD 12.0-RC1

[MaskRay]

Describe the bug

On FreeBSD 12.0-RC1
LanguageClient#textDocument_references timeouts and gets the vim-side plugin into a broken state where no further client command works.

LanguageClient#textDocument_definition seems to work.

There must be some platform-specific issue as the same configuration works on Linux.

Environment

• neovim/vim version: editors/neovim 0.3.1
• This plugin version (git rev-parse --short HEAD): 95608f5
• This plugin's binary version (bin/languageclient --version): languageclient 0.1.127 95608f5

To Reproduce

cd ~/.vim/bundle
git clone https://github.com/autozimu/LanguageClient-neovim --depth=1 --branch=next
cd LanguageClient-neovim
make release

nn <silent> <M-,> :call LanguageClient#textDocument_references({'includeDeclaration': v:false})<cr>

Click M-,, the split window uses fzf to display Location[]. However, after I select an item and press Enter, the vim-side plugin does not jump to that location, but instead, it gets into a broken state where no LanguageClient#* command works. textDocument/documentHighlight highlight gets stuck and doesn't update. https://github.com/MaskRay/ccls/wiki/LanguageClient-neovim#textdocumentdocumenthighlight

In another shell, truss -p $(pgrep -fn languageclient) displays:

write(1,"{"jsonrpc":"2.0","error":{"code":-32603,"message":"timed out waiting on channel"},"id":55}\n",91) = 91

Tried again with more information:

_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x0,0x0) = 0 (0x0)
write(1,"Content-Length: 74\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["[expand('<cword>')]"],"id":21}\n",75) = 75 (0x4b)
read(0,"{"id": 21, "jsonrpc": "2.0", "result": ["foo"]}\n",8192) = 48 (0x30)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb338) = 0 (0x0)
write(4,"Content-Length: 451\r\n\r\n{"jsonrpc":"2.0","method":"textDocument/references","params":{"buftype":"","character":2,"context":{"includeDeclaration":true},"filename":"/tmp/c/a.c","gotoCmd":null,"handle":true,"includeDeclaration":true,"languageId":"c","line":5,"method":"textDocument/references","position":{"character":2,"line":5},"text":["#include <stdio.h>","void foo() {","}","","int main() {","  foo();","  foo();","}",""],"textDocument":{"uri":"file:///tmp/c/a.c"}},"id":22}",474) = 474 (0x1da)
_umtx_op(0x80221a1b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb408) = 0 (0x0)
write(1,"Content-Length: 63\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["getcwd()"],"id":23}\n",64) = 64 (0x40)
read(0,"{"id": 23, "jsonrpc": "2.0", "result": "/tmp/c"}\n",8192) = 49 (0x31)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb308) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",6],"id":24}\n",74) = 74 (0x4a)
read(0,"{"id": 24, "jsonrpc": "2.0", "result": ["  foo();"]}\n",8192) = 53 (0x35)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",7],"id":25}\n",74) = 74 (0x4a)
read(0,"{"id": 25, "jsonrpc": "2.0", "result": ["  foo();"]}\n",8192) = 53 (0x35)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",2],"id":26}\n",74) = 74 (0x4a)
read(0,"{"id": 26, "jsonrpc": "2.0", "result": ["void foo() {"]}\n",8192) = 57 (0x39)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 153\n\n",21)		 = 21 (0x15)
write(1,"{"jsonrpc":"2.0","method":"s:FZF","params":[["a.c:6:3:\\tfoo();","a.c:7:3:\\tfoo();","a.c:2:6:\\tvoid foo() {"],"s:LanguageClient_FZFSinkLocation"],"id":27}\n",154) = 154 (0x9a)
read(0,"{"method": "LanguageClient_FZFSinkLocation", "jsonrpc": "2.0", "params": ["a.c:6:3:\\tfoo();"]}\n",8192) = 95 (0x5f)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
read(0,"{"method": "languageClient/handleCursorMoved", "jsonrpc": "2.0", "params": {"languageId": "c", "line": 5, "LSP#visible_line_start()": 0, "LSP#visible_line_end()": 7, "buftype": "", "filename": "/tmp/c/a.c"}}\n",8192) = 208 (0xd0)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
read(0,"{"id": 3, "jsonrpc": "2.0", "method": "textDocument/references", "params": {"gotoCmd": null, "character": 2, "handle": true, "languageId": "c", "line": 5, "includeDeclaration": true, "buftype": "", "text": ["#include <stdio.h>", "void foo() {", "}", "", "int main() {", "  foo();", "  foo();", "}", ""], "filename": "/tmp/c/a.c"}}\n",8192) = 331 (0x14b)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) ERR#60 'Operation timed out'
write(1,"Content-Length: 89\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","error":{"code":-32603,"message":"timed out waiting on channel"},"id":2}\n",90) = 90 (0x5a)
write(1,"Content-Length: 63\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["getcwd()"],"id":28}\n",64) = 64 (0x40)
read(0,"{"id": 28, "jsonrpc": "2.0", "result": "/tmp/c"}\n",8192) = 49 (0x31)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffbd88) = 0 (0x0)
write(1,"Content-Length: 74\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"s:Edit","params":["edit","/tmp/c/a.c"],"id":29}\n",75) = 75 (0x4b)
read(0,"{"id": 29, "jsonrpc": "2.0", "result": 0}\n",8192) = 42 (0x2a)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffbcd8) = 0 (0x0)
write(1,"Content-Length: 50\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"cursor","params":[6,3]}\n",51) = 51 (0x33)
write(1,"Content-Length: 74\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["[expand('<cword>')]"],"id":30}\n",75) = 75 (0x4b)
read(0,"{"id": 30, "jsonrpc": "2.0", "result": ["foo"]}\n",8192) = 48 (0x30)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb338) = 0 (0x0)
write(4,"Content-Length: 451\r\n\r\n{"jsonrpc":"2.0","method":"textDocument/references","params":{"buftype":"","character":2,"context":{"includeDeclaration":true},"filename":"/tmp/c/a.c","gotoCmd":null,"handle":true,"includeDeclaration":true,"languageId":"c","line":5,"method":"textDocument/references","position":{"character":2,"line":5},"text":["#include <stdio.h>","void foo() {","}","","int main() {","  foo();","  foo();","}",""],"textDocument":{"uri":"file:///tmp/c/a.c"}},"id":31}",474) = 474 (0x1da)
read(5,"Content-Length: 342\r\n\r\n{"jsonrpc":"2.0","id":31,"result":[{"uri":"file:///tmp/c/a.c","range":{"start":{"line":5,"character":2},"end":{"line":5,"character":5}}},{"uri":"file:///tmp/c/a.c","range":{"start":{"line":6,"character":2},"end":{"line":6,"character":5}}},{"uri":"file:///tmp/c/a.c","range":{"start":{"line":1,"character":5},"end":{"line":1,"character":8}}}]}",8192) = 365 (0x16d)
_umtx_op(0x80221a1b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb408) = 0 (0x0)
write(1,"Content-Length: 63\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["getcwd()"],"id":32}\n",64) = 64 (0x40)
read(0,"{"id": 32, "jsonrpc": "2.0", "result": "/tmp/c"}\n",8192) = 49 (0x31)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb308) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",6],"id":33}\n",74) = 74 (0x4a)
read(0,"{"id": 33, "jsonrpc": "2.0", "result": ["  foo();"]}\n",8192) = 53 (0x35)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",7],"id":34}\n",74) = 74 (0x4a)
read(0,"{"id": 34, "jsonrpc": "2.0", "result": ["  foo();"]}\n",8192) = 53 (0x35)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",2],"id":35}\n",74) = 74 (0x4a)
read(0,"{"id": 35, "jsonrpc": "2.0", "result": ["void foo() {"]}\n",8192) = 57 (0x39)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 153\n\n",21)		 = 21 (0x15)
write(1,"{"jsonrpc":"2.0","method":"s:FZF","params":[["a.c:6:3:\\tfoo();","a.c:7:3:\\tfoo();","a.c:2:6:\\tvoid foo() {"],"s:LanguageClient_FZFSinkLocation"],"id":36}\n",154) = 154 (0x9a)
read(0,"{"method": "LanguageClient_FZFSinkLocation", "jsonrpc": "2.0", "params": ["a.c:7:3:\\tfoo();"]}\n",8192) = 95 (0x5f)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
read(0,"{"method": "languageClient/handleCursorMoved", "jsonrpc": "2.0", "params": {"languageId": "c", "line": 5, "LSP#visible_line_start()": 0, "LSP#visible_line_end()": 7, "buftype": "", "filename": "/tmp/c/a.c"}}\n",8192) = 208 (0xd0)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
read(0,"{"id": 4, "jsonrpc": "2.0", "method": "textDocument/references", "params": {"gotoCmd": null, "character": 2, "handle": true, "languageId": "c", "line": 5, "includeDeclaration": true, "buftype": "", "text": ["#include <stdio.h>", "void foo() {", "}", "", "int main() {", "  foo();", "  foo();", "}", ""], "filename": "/tmp/c/a.c"}}\n",8192) = 331 (0x14b)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) ERR#60 'Operation timed out'
write(1,"Content-Length: 89\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","error":{"code":-32603,"message":"timed out waiting on channel"},"id":3}\n",90) = 90 (0x5a)
write(1,"Content-Length: 63\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["getcwd()"],"id":37}\n",64) = 64 (0x40)
read(0,"{"id": 37, "jsonrpc": "2.0", "result": "/tmp/c"}\n",8192) = 49 (0x31)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffbd88) = 0 (0x0)
write(1,"Content-Length: 74\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"s:Edit","params":["edit","/tmp/c/a.c"],"id":38}\n",75) = 75 (0x4b)
read(0,"{"id": 38, "jsonrpc": "2.0", "result": 0}\n",8192) = 42 (0x2a)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffbcd8) = 0 (0x0)
write(1,"Content-Length: 50\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"cursor","params":[7,3]}\n",51) = 51 (0x33)
write(1,"Content-Length: 74\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["[expand('<cword>')]"],"id":39}\n",75) = 75 (0x4b)
read(0,"{"method": "languageClient/handleCursorMoved", "jsonrpc": "2.0", "params": {"languageId": "c", "line": 6, "LSP#visible_line_start()": 0, "LSP#visible_line_end()": 7, "buftype": "", "filename": "/tmp/c/a.c"}}\n",8192) = 208 (0xd0)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb338) = 0 (0x0)
read(0,"{"id": 39, "jsonrpc": "2.0", "result": ["foo"]}\n",8192) = 48 (0x30)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb338) = 0 (0x0)
write(4,"Content-Length: 451\r\n\r\n{"jsonrpc":"2.0","method":"textDocument/references","params":{"buftype":"","character":2,"context":{"includeDeclaration":true},"filename":"/tmp/c/a.c","gotoCmd":null,"handle":true,"includeDeclaration":true,"languageId":"c","line":5,"method":"textDocument/references","position":{"character":2,"line":5},"text":["#include <stdio.h>","void foo() {","}","","int main() {","  foo();","  foo();","}",""],"textDocument":{"uri":"file:///tmp/c/a.c"}},"id":40}",474) = 474 (0x1da)
read(5,"Content-Length: 342\r\n\r\n{"jsonrpc":"2.0","id":40,"result":[{"uri":"file:///tmp/c/a.c","range":{"start":{"line":5,"character":2},"end":{"line":5,"character":5}}},{"uri":"file:///tmp/c/a.c","range":{"start":{"line":6,"character":2},"end":{"line":6,"character":5}}},{"uri":"file:///tmp/c/a.c","range":{"start":{"line":1,"character":5},"end":{"line":1,"character":8}}}]}",8192) = 365 (0x16d)
_umtx_op(0x80221a1b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb408) = 0 (0x0)
write(1,"Content-Length: 63\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"eval","params":["getcwd()"],"id":41}\n",64) = 64 (0x40)
read(0,"{"id": 41, "jsonrpc": "2.0", "result": "/tmp/c"}\n",8192) = 49 (0x31)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb308) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",6],"id":42}\n",74) = 74 (0x4a)
read(0,"{"id": 42, "jsonrpc": "2.0", "result": ["  foo();"]}\n",8192) = 53 (0x35)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",7],"id":43}\n",74) = 74 (0x4a)
read(0,"{"id": 43, "jsonrpc": "2.0", "result": ["  foo();"]}\n",8192) = 53 (0x35)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 73\n\n",20)		 = 20 (0x14)
write(1,"{"jsonrpc":"2.0","method":"getbufline","params":["/tmp/c/a.c",2],"id":44}\n",74) = 74 (0x4a)
read(0,"{"id": 44, "jsonrpc": "2.0", "result": ["void foo() {"]}\n",8192) = 57 (0x39)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffaf38) = 0 (0x0)
write(1,"Content-Length: 153\n\n",21)		 = 21 (0x15)
write(1,"{"jsonrpc":"2.0","method":"s:FZF","params":[["a.c:6:3:\\tfoo();","a.c:7:3:\\tfoo();","a.c:2:6:\\tvoid foo() {"],"s:LanguageClient_FZFSinkLocation"],"id":45}\n",154) = 154 (0x9a)
read(0,"{"method": "LanguageClient_FZFSinkLocation", "jsonrpc": "2.0", "params": ["a.c:2:6:\\tvoid foo() {"]}\n",8192) = 101 (0x65)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)
read(0,"{"method": "languageClient/handleCursorMoved", "jsonrpc": "2.0", "params": {"languageId": "c", "line": 6, "LSP#visible_line_start()": 0, "LSP#visible_line_end()": 7, "buftype": "", "filename": "/tmp/c/a.c"}}\n",8192) = 208 (0xd0)
_umtx_op(0x8022197b8,UMTX_OP_NWAKE_PRIVATE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x8014e4c10,UMTX_OP_WAIT_UINT_PRIVATE,0x0,0x18,0x7fffffffb428) = 0 (0x0)