patch 9.2.0159: Crash when reading quickfix line

Problem:  Crash when reading quickfix line (Kaiyu Xie)
Solution: Make sure line is terminated by NUL

closes: #19667

Supported by AI

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/quickfix.c

@@ -838,6 +838,7 @@ qf_get_next_file_line(qfstate_T *state)
 	// Copy the read part of the line, excluding null-terminator
 	memcpy(state->growbuf, IObuff, IOSIZE - 1);
 	growbuflen = state->linelen;
+	state->growbuf[growbuflen] = NUL;
 
 	for (;;)
 	{

src/testdir/test_quickfix.vim

@@ -6992,4 +6992,19 @@ func Test_quickfixtextfunc_wipes_buffer()
   bw
 endfunc
 
+func Test_quickfix_longline_noeol()
+  CheckRunVimInTerminal
+  let qf = 'Xquickfix'
+  let args = $"-q {qf}"
+  let after =<< trim [CODE]
+    call writefile(['okay'], "XDONE")
+    qall!
+  [CODE]
+  defer delete("XDONE")
+  call writefile([repeat('A', 1024)], qf, 'bD')
+  call RunVim([], after, args)
+  call WaitForAssert({-> assert_true(filereadable("XDONE"))})
+  call assert_equal(['okay'], readfile("XDONE"))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    159,
 /**/
     158,
 /**/