feat(qf): parse the emergency stop signal

refer: #3086

Author: lervag

Diff for: autoload/vimtex/qf/latexlog.vim

@@ -33,6 +33,7 @@ function! s:qf.set_errorformat() abort dict "{{{1
   setlocal errorformat+=%-P**\"%f\"
 
   " Match errors
+  setlocal errorformat+=%+E!\ Emergency\ stop.
   setlocal errorformat+=%E!\ LaTeX\ %trror:\ %m
   setlocal errorformat+=%E!pdfTeX\ error:\ %m
   setlocal errorformat+=%E%f:%l:\ \ ==>\ %m
@@ -134,6 +135,10 @@ function! s:qf.fix_paths(log) abort dict " {{{1
       let l:qf.text = substitute(l:qf.text, '\s*on input line \d\+.$', '', '')
     endif
 
+    if l:qf.text ==# '! Emergency stop.'
+      let l:qf.text = 'Emergency stop (fatal error)!'
+    endif
+
     " Handle missing buffer/filename: Fallback to the main file (this is always
     " correct in single-file projects and is thus a good fallback).
     if l:qf.bufnr == 0

Diff for: test/test-quickfix/test-latexlog.vim

@@ -13,6 +13,7 @@ endtry
 
 let s:expected_list = [
       \ {'lnum': 0,   'type': 'E', 'text': "Runaway argument?\n{\\sqrt {{1}} \\end {equation} \\par \\end {document} \nFile ended while scanning use of \\frac ."},
+      \ {'lnum': 0,   'type': 'E', 'text': "Emergency stop (fatal error)!"},
       \ {'lnum': 0,   'type': 'E', 'text': 'Runaway argument?'},
       \ {'lnum': 16,  'type': 'E', 'text': 'Paragraph ended before \date  was complete.'},
       \ {'lnum': 11,  'type': 'E', 'text': "Undefined control sequence.\n\\cdashline"},