vim-patch:8.2.0886: cannot use octal numbers in scriptversion 4

Problem:    Cannot use octal numbers in scriptversion 4.
Solution:   Add the "0o" notation. (Ken Takata, closes vim/vim#5304)
https://github.com/vim/vim/commit/c17e66c5c0acd5038f1eb3d7b3049b64bb6ea30b

:scriptversion is N/A.

Cherry-pick latest str2nr() doc changes from v8.1.2035.
Cherry-pick various mentions of the 0o prefix from:
 - v8.2.2324
 - https://github.com/vim/vim/commit/2346a6378483c9871016f9fc821ec5cbea638f13
 - https://github.com/vim/vim/commit/11e3c5ba820325b69cb56f70e13c21d7b8808d33
 - https://github.com/vim/vim/commit/82be4849eed0b8fbee45bc8da99b685ec89af59a

Patch used ascii_isbdigit() by mistake, which was fixed in v8.2.2309.

Make STR2NR_OOCT work the same as STR2NR_OCT when forcing.
In Vim, STR2NR_FORCE | STR2NR_OOCT isn't handled, and doesn't actually
force anything. Rather than abort(), make it work as STR2NR_OCT.

This means STR2NR_FORCE | STR2NR_OCT works the same as
STR2NR_FORCE | STR2NR_OOCT and STR2NR_FORCE | STR2NR_OCT | STR2NR_OOCT.

7 files changed, 160 insertions, 28 deletions

diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index cd449a5d34..d2e476b83b 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -20,7 +20,7 @@ There are six types of variables:
 							*Number* *Integer*
 Number		A 32 or 64 bit signed number.  |expr-number|
 		The number of bits is available in |v:numbersize|.
-		Examples:  -123  0x10  0177  0b1011
+		Examples:  -123  0x10  0177  0o177  0b1011
 
 Float		A floating point number. |floating-point-format| *Float*
 		Examples: 123.456  1.15e-6  -1.1e3
@@ -54,14 +54,15 @@ the Number.  Examples:
 	Number -1	-->	String "-1" ~
 							*octal*
 Conversion from a String to a Number is done by converting the first digits to
-a number.  Hexadecimal "0xf9", Octal "017", and Binary "0b10" numbers are
-recognized.  If the String doesn't start with digits, the result is zero.
-Examples:
+a number.  Hexadecimal "0xf9", Octal "017" or "0o17", and Binary "0b10"
+numbers are recognized.  If the String doesn't start with digits, the result
+is zero. Examples:
 	String "456"	-->	Number 456 ~
 	String "6bar"	-->	Number 6 ~
 	String "foo"	-->	Number 0 ~
 	String "0xf1"	-->	Number 241 ~
 	String "0100"	-->	Number 64 ~
+	String "0o100"	-->	Number 64 ~
 	String "0b101"	-->	Number 5 ~
 	String "-8"	-->	Number -8 ~
 	String "+8"	-->	Number 0 ~
@@ -1085,7 +1086,7 @@ number			number constant			*expr-number*
 				*hex-number* *octal-number* *binary-number*
 
 Decimal, Hexadecimal (starting with 0x or 0X), Binary (starting with 0b or 0B)
-and Octal (starting with 0).
+and Octal (starting with 0, 0o or 0O).
 
 						*floating-point-format*
 Floating point numbers can be written in two forms:
@@ -6554,9 +6555,9 @@ mkdir({name} [, {path} [, {prot}]])
 		If {path} is "p" then intermediate directories are created as
 		necessary.  Otherwise it must be "".
 		If {prot} is given it is used to set the protection bits of
-		the new directory.  The default is 0755 (rwxr-xr-x: r/w for
-		the user readable for others).  Use 0700 to make it unreadable
-		for others.
+		the new directory.  The default is 0o755 (rwxr-xr-x: r/w for
+		the user, readable for others).  Use 0o700 to make it
+		unreadable for others.
 
 		{prot} is applied for all parts of {name}.  Thus if you create
 		/tmp/foo/bar then /tmp/foo will be created with 0700. Example: >
@@ -8650,9 +8651,9 @@ str2nr({expr} [, {base} [, {quoted}]])				*str2nr()*
 			let nr = str2nr('123')
 <
 		When {base} is 16 a leading "0x" or "0X" is ignored.  With a
-		different base the result will be zero. Similarly, when {base}
-		is 8 a leading "0" is ignored, and when {base} is 2 a leading
-		"0b" or "0B" is ignored.
+		different base the result will be zero. Similarly, when
+		{base} is 8 a leading "0", "0o" or "0O" is ignored, and when
+		{base} is 2 a leading "0b" or "0B" is ignored.
 		Text after the number is silently ignored.
 
 
diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index a190bf2f27..c9321e8736 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -118,7 +118,8 @@ Numbers can be decimal, hexadecimal, octal or binary.
 A hexadecimal number starts with "0x" or "0X".  For example "0x1f" is decimal
 31.
 
-An octal number starts with a zero and another digit.  "017" is decimal 15.
+An octal number starts with "0o", "0O" or a zero and another digit.  "0o17" is
+decimal 15.
 
 A binary number starts with "0b" or "0B".  For example "0b101" is decimal 5.
 
@@ -127,14 +128,14 @@ number, it will be interpreted as an octal number!
 
 The ":echo" command always prints decimal numbers.  Example: >
 
-	:echo 0x7f 036
+	:echo 0x7f 0o36
 <	127 30 ~
 
 A number is made negative with a minus sign.  This also works for hexadecimal,
 octal and binary numbers.  A minus sign is also used for subtraction.  Compare
 this with the previous example: >
 
-	:echo 0x7f -036
+	:echo 0x7f -0o36
 <	97 ~
 
 White space in an expression is ignored.  However, it's recommended to use it
@@ -142,7 +143,7 @@ for separating items, to make the expression easier to read.  For example, to
 avoid the confusion with a negative number above, put a space between the
 minus sign and the following number: >
 
-	:echo 0x7f - 036
+	:echo 0x7f - 0o36
 
 ==============================================================================
 *41.2*	Variables
diff --git a/src/nvim/charset.c b/src/nvim/charset.c
index 7b08488925..94b6b7a8d7 100644
--- a/src/nvim/charset.c
+++ b/src/nvim/charset.c
@@ -1385,6 +1385,8 @@ bool vim_isblankline(char_u *lbuf)
 /// If "prep" is not NULL, returns a flag to indicate the type of the number:
 ///   0      decimal
 ///   '0'    octal
+///   'O'    octal
+///   'o'    octal
 ///   'B'    bin
 ///   'b'    bin
 ///   'X'    hex
@@ -1402,8 +1404,8 @@ bool vim_isblankline(char_u *lbuf)
 ///
 /// @param start
 /// @param prep Returns guessed type of number 0 = decimal, 'x' or 'X' is
-///             hexadecimal, '0' = octal, 'b' or 'B' is binary. When using
-///             STR2NR_FORCE is always zero.
+///             hexadecimal, '0', 'o' or 'O' is octal, 'b' or 'B' is binary.
+///             When using STR2NR_FORCE is always zero.
 /// @param len Returns the detected length of number.
 /// @param what Recognizes what number passed, @see ChStr2NrFlags.
 /// @param nptr Returns the signed result.
@@ -1433,8 +1435,8 @@ void vim_str2nr(const char_u *const start, int *const prep, int *const len,
   }
 
   if (what & STR2NR_FORCE) {
-    // When forcing main consideration is skipping the prefix. Octal and decimal
-    // numbers have no prefixes to skip. pre is not set.
+    // When forcing main consideration is skipping the prefix. Decimal numbers
+    // have no prefixes to skip. pre is not set.
     switch (what & ~(STR2NR_FORCE | STR2NR_QUOTE)) {
       case STR2NR_HEX: {
         if (!STRING_ENDED(ptr + 2)
@@ -1454,7 +1456,16 @@ void vim_str2nr(const char_u *const start, int *const prep, int *const len,
         }
         goto vim_str2nr_bin;
       }
-      case STR2NR_OCT: {
+      // Make STR2NR_OOCT work the same as STR2NR_OCT when forcing.
+      case STR2NR_OCT:
+      case STR2NR_OOCT:
+      case STR2NR_OCT | STR2NR_OOCT: {
+        if (!STRING_ENDED(ptr + 2)
+            && ptr[0] == '0'
+            && (ptr[1] == 'o' || ptr[1] == 'O')
+            && ascii_isbdigit(ptr[2])) {
+          ptr += 2;
+        }
         goto vim_str2nr_oct;
       }
       case 0: {
@@ -1464,9 +1475,9 @@ void vim_str2nr(const char_u *const start, int *const prep, int *const len,
         abort();
       }
     }
-  } else if ((what & (STR2NR_HEX|STR2NR_OCT|STR2NR_BIN))
-             && !STRING_ENDED(ptr + 1)
-             && ptr[0] == '0' && ptr[1] != '8' && ptr[1] != '9') {
+  } else if ((what & (STR2NR_HEX | STR2NR_OCT | STR2NR_OOCT | STR2NR_BIN))
+             && !STRING_ENDED(ptr + 1) && ptr[0] == '0' && ptr[1] != '8'
+             && ptr[1] != '9') {
     pre = ptr[1];
     // Detect hexadecimal: 0x or 0X followed by hex digit.
     if ((what & STR2NR_HEX)
@@ -1484,7 +1495,15 @@ void vim_str2nr(const char_u *const start, int *const prep, int *const len,
       ptr += 2;
       goto vim_str2nr_bin;
     }
-    // Detect octal number: zero followed by octal digits without '8' or '9'.
+    // Detect octal: 0o or 0O followed by octal digits (without '8' or '9').
+    if ((what & STR2NR_OOCT)
+        && !STRING_ENDED(ptr + 2)
+        && (pre == 'O' || pre == 'o')
+        && ascii_isbdigit(ptr[2])) {
+      ptr += 2;
+      goto vim_str2nr_oct;
+    }
+    // Detect old octal format: 0 followed by octal digits.
     pre = 0;
     if (!(what & STR2NR_OCT)
         || !('0' <= ptr[1] && ptr[1] <= '7')) {
diff --git a/src/nvim/charset.h b/src/nvim/charset.h
index b5f1f8506b..2fef4d78a2 100644
--- a/src/nvim/charset.h
+++ b/src/nvim/charset.h
@@ -23,14 +23,19 @@ typedef enum {
   STR2NR_BIN = (1 << 0),  ///< Allow binary numbers.
   STR2NR_OCT = (1 << 1),  ///< Allow octal numbers.
   STR2NR_HEX = (1 << 2),  ///< Allow hexadecimal numbers.
+  STR2NR_OOCT = (1 << 3),  ///< Octal with prefix "0o": 0o777
   /// Force one of the above variants.
   ///
   /// STR2NR_FORCE|STR2NR_DEC is actually not different from supplying zero
   /// as flags, but still present for completeness.
+  ///
+  /// STR2NR_FORCE|STR2NR_OCT|STR2NR_OOCT is the same as STR2NR_FORCE|STR2NR_OCT
+  /// or STR2NR_FORCE|STR2NR_OOCT.
   STR2NR_FORCE = (1 << 7),
   /// Recognize all formats vim_str2nr() can recognize.
-  STR2NR_ALL = STR2NR_BIN | STR2NR_OCT | STR2NR_HEX,
-  STR2NR_NO_OCT = STR2NR_BIN | STR2NR_HEX,  ///< Disallow octal numbers.
+  STR2NR_ALL = STR2NR_BIN | STR2NR_OCT | STR2NR_HEX | STR2NR_OOCT,
+  /// Disallow octals numbers without the 0o prefix.
+  STR2NR_NO_OCT = STR2NR_BIN | STR2NR_HEX | STR2NR_OOCT,
   STR2NR_QUOTE = (1 << 4),  ///< Ignore embedded single quotes.
 } ChStr2NrFlags;
 
diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index 61f535e32e..801b0f9d1c 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -10022,7 +10022,7 @@ static void f_str2nr(typval_T *argvars, typval_T *rettv, FunPtr fptr)
       break;
     }
     case 8: {
-      what |= STR2NR_OCT | STR2NR_FORCE;
+      what |= STR2NR_OCT | STR2NR_OOCT | STR2NR_FORCE;
       break;
     }
     case 16: {
diff --git a/src/nvim/testdir/test_functions.vim b/src/nvim/testdir/test_functions.vim
index 2e838f73b6..ed46730cbb 100644
--- a/src/nvim/testdir/test_functions.vim
+++ b/src/nvim/testdir/test_functions.vim
@@ -152,6 +152,10 @@ func Test_str2nr()
   call assert_equal(65, str2nr('0101', 8))
   call assert_equal(-65, str2nr('-101', 8))
   call assert_equal(-65, str2nr('-0101', 8))
+  call assert_equal(65, str2nr('0o101', 8))
+  call assert_equal(65, str2nr('0O0101', 8))
+  call assert_equal(-65, str2nr('-0O101', 8))
+  call assert_equal(-65, str2nr('-0o0101', 8))
 
   call assert_equal(11259375, str2nr('abcdef', 16))
   call assert_equal(11259375, str2nr('ABCDEF', 16))
@@ -170,6 +174,7 @@ func Test_str2nr()
 
   call assert_equal(0, str2nr('0x10'))
   call assert_equal(0, str2nr('0b10'))
+  call assert_equal(0, str2nr('0o10'))
   call assert_equal(1, str2nr('12', 2))
   call assert_equal(1, str2nr('18', 8))
   call assert_equal(1, str2nr('1g', 16))
diff --git a/test/unit/charset/vim_str2nr_spec.lua b/test/unit/charset/vim_str2nr_spec.lua
index ebcceca7ae..5fc3b83a13 100644
--- a/test/unit/charset/vim_str2nr_spec.lua
+++ b/test/unit/charset/vim_str2nr_spec.lua
@@ -86,10 +86,13 @@ describe('vim_str2nr()', function()
     test_vim_str2nr('', lib.STR2NR_ALL, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_BIN, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_OCT, {len = 0, num = 0, unum = 0, pre = 0}, 0)
+    test_vim_str2nr('', lib.STR2NR_OOCT, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_HEX, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_FORCE + lib.STR2NR_DEC, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_FORCE + lib.STR2NR_BIN, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_FORCE + lib.STR2NR_OCT, {len = 0, num = 0, unum = 0, pre = 0}, 0)
+    test_vim_str2nr('', lib.STR2NR_FORCE + lib.STR2NR_OOCT, {len = 0, num = 0, unum = 0, pre = 0}, 0)
+    test_vim_str2nr('', lib.STR2NR_FORCE + lib.STR2NR_OCT + lib.STR2NR_OOCT, {len = 0, num = 0, unum = 0, pre = 0}, 0)
     test_vim_str2nr('', lib.STR2NR_FORCE + lib.STR2NR_HEX, {len = 0, num = 0, unum = 0, pre = 0}, 0)
   end)
   itp('works with decimal numbers', function()
@@ -98,9 +101,11 @@ describe('vim_str2nr()', function()
       lib.STR2NR_BIN,
       lib.STR2NR_OCT,
       lib.STR2NR_HEX,
+      lib.STR2NR_OOCT,
       lib.STR2NR_BIN + lib.STR2NR_OCT,
       lib.STR2NR_BIN + lib.STR2NR_HEX,
       lib.STR2NR_OCT + lib.STR2NR_HEX,
+      lib.STR2NR_OOCT + lib.STR2NR_HEX,
       lib.STR2NR_ALL,
       lib.STR2NR_FORCE + lib.STR2NR_DEC,
     }) do
@@ -212,13 +217,16 @@ describe('vim_str2nr()', function()
       end
     end
   end)
-  itp('works with octal numbers', function()
+  itp('works with octal numbers (0 prefix)', function()
     for _, flags in ipairs({
       lib.STR2NR_OCT,
       lib.STR2NR_OCT + lib.STR2NR_BIN,
       lib.STR2NR_OCT + lib.STR2NR_HEX,
+      lib.STR2NR_OCT + lib.STR2NR_OOCT,
       lib.STR2NR_ALL,
       lib.STR2NR_FORCE + lib.STR2NR_OCT,
+      lib.STR2NR_FORCE + lib.STR2NR_OOCT,
+      lib.STR2NR_FORCE + lib.STR2NR_OCT + lib.STR2NR_OOCT,
     }) do
       local oct
       if flags > lib.STR2NR_FORCE then
@@ -267,6 +275,99 @@ describe('vim_str2nr()', function()
       end
     end
   end)
+  itp('works with octal numbers (0o or 0O prefix)', function()
+    for _, flags in ipairs({
+      lib.STR2NR_OOCT,
+      lib.STR2NR_OOCT + lib.STR2NR_BIN,
+      lib.STR2NR_OOCT + lib.STR2NR_HEX,
+      lib.STR2NR_OCT + lib.STR2NR_OOCT,
+      lib.STR2NR_OCT + lib.STR2NR_OOCT + lib.STR2NR_BIN,
+      lib.STR2NR_OCT + lib.STR2NR_OOCT + lib.STR2NR_HEX,
+      lib.STR2NR_ALL,
+      lib.STR2NR_FORCE + lib.STR2NR_OCT,
+      lib.STR2NR_FORCE + lib.STR2NR_OOCT,
+      lib.STR2NR_FORCE + lib.STR2NR_OCT + lib.STR2NR_OOCT,
+    }) do
+      local oct
+      local OCT
+      if flags > lib.STR2NR_FORCE then
+        oct = 0
+        OCT = 0
+      else
+        oct = ('o'):byte()
+        OCT = ('O'):byte()
+      end
+
+      test_vim_str2nr( '0o054',  flags, {len = 5, num =  44, unum = 44, pre = oct}, 0)
+      test_vim_str2nr( '0o054',  flags, {len = 1, num =   0, unum =  0, pre = 0  }, 1)
+      test_vim_str2nr( '0o054',  flags, {len = 0}, 2)
+      test_vim_str2nr( '0o054',  flags, {len = 3, num =   0, unum =  0, pre = oct}, 3)
+      test_vim_str2nr( '0o054',  flags, {len = 4, num =   5, unum =  5, pre = oct}, 4)
+      test_vim_str2nr( '0o054',  flags, {len = 5, num =  44, unum = 44, pre = oct}, 5)
+      test_vim_str2nr( '0o0548', flags, {len = 5, num =  44, unum = 44, pre = oct}, 5)
+      test_vim_str2nr( '0o054',  flags, {len = 5, num =  44, unum = 44, pre = oct}, 6)
+
+      test_vim_str2nr( '0o054x', flags, {len = 0}, 6)
+      test_vim_str2nr( '0o054x', flags, {len = 0}, 0)
+      test_vim_str2nr( '0o054x', flags, {len = 5, num =  44, unum = 44, pre = oct}, 6, false)
+      test_vim_str2nr( '0o054x', flags, {len = 5, num =  44, unum = 44, pre = oct}, 0, false)
+
+      test_vim_str2nr('-0o054',  flags, {len = 6, num = -44, unum = 44, pre = oct}, 0)
+      test_vim_str2nr('-0o054',  flags, {len = 1, num =   0, unum =  0, pre = 0  }, 1)
+      test_vim_str2nr('-0o054',  flags, {len = 2, num =   0, unum =  0, pre = 0  }, 2)
+      test_vim_str2nr('-0o054',  flags, {len = 0}, 3)
+      test_vim_str2nr('-0o054',  flags, {len = 4, num =   0, unum =  0, pre = oct}, 4)
+      test_vim_str2nr('-0o054',  flags, {len = 5, num =  -5, unum =  5, pre = oct}, 5)
+      test_vim_str2nr('-0o054',  flags, {len = 6, num = -44, unum = 44, pre = oct}, 6)
+      test_vim_str2nr('-0o0548', flags, {len = 6, num = -44, unum = 44, pre = oct}, 6)
+      test_vim_str2nr('-0o054',  flags, {len = 6, num = -44, unum = 44, pre = oct}, 7)
+
+      test_vim_str2nr('-0o054x', flags, {len = 0}, 7)
+      test_vim_str2nr('-0o054x', flags, {len = 0}, 0)
+      test_vim_str2nr('-0o054x', flags, {len = 6, num = -44, unum = 44, pre = oct}, 7, false)
+      test_vim_str2nr('-0o054x', flags, {len = 6, num = -44, unum = 44, pre = oct}, 0, false)
+
+      test_vim_str2nr( '0O054',  flags, {len = 5, num =  44, unum = 44, pre = OCT}, 0)
+      test_vim_str2nr( '0O054',  flags, {len = 1, num =   0, unum =  0, pre = 0  }, 1)
+      test_vim_str2nr( '0O054',  flags, {len = 0}, 2)
+      test_vim_str2nr( '0O054',  flags, {len = 3, num =   0, unum =  0, pre = OCT}, 3)
+      test_vim_str2nr( '0O054',  flags, {len = 4, num =   5, unum =  5, pre = OCT}, 4)
+      test_vim_str2nr( '0O054',  flags, {len = 5, num =  44, unum = 44, pre = OCT}, 5)
+      test_vim_str2nr( '0O0548', flags, {len = 5, num =  44, unum = 44, pre = OCT}, 5)
+      test_vim_str2nr( '0O054',  flags, {len = 5, num =  44, unum = 44, pre = OCT}, 6)
+
+      test_vim_str2nr( '0O054x', flags, {len = 0}, 6)
+      test_vim_str2nr( '0O054x', flags, {len = 0}, 0)
+      test_vim_str2nr( '0O054x', flags, {len = 5, num =  44, unum = 44, pre = OCT}, 6, false)
+      test_vim_str2nr( '0O054x', flags, {len = 5, num =  44, unum = 44, pre = OCT}, 0, false)
+
+      test_vim_str2nr('-0O054',  flags, {len = 6, num = -44, unum = 44, pre = OCT}, 0)
+      test_vim_str2nr('-0O054',  flags, {len = 1, num =   0, unum =  0, pre = 0  }, 1)
+      test_vim_str2nr('-0O054',  flags, {len = 2, num =   0, unum =  0, pre = 0  }, 2)
+      test_vim_str2nr('-0O054',  flags, {len = 0}, 3)
+      test_vim_str2nr('-0O054',  flags, {len = 4, num =   0, unum =  0, pre = OCT}, 4)
+      test_vim_str2nr('-0O054',  flags, {len = 5, num =  -5, unum =  5, pre = OCT}, 5)
+      test_vim_str2nr('-0O054',  flags, {len = 6, num = -44, unum = 44, pre = OCT}, 6)
+      test_vim_str2nr('-0O0548', flags, {len = 6, num = -44, unum = 44, pre = OCT}, 6)
+      test_vim_str2nr('-0O054',  flags, {len = 6, num = -44, unum = 44, pre = OCT}, 7)
+
+      test_vim_str2nr('-0O054x', flags, {len = 0}, 7)
+      test_vim_str2nr('-0O054x', flags, {len = 0}, 0)
+      test_vim_str2nr('-0O054x', flags, {len = 6, num = -44, unum = 44, pre = OCT}, 7, false)
+      test_vim_str2nr('-0O054x', flags, {len = 6, num = -44, unum = 44, pre = OCT}, 0, false)
+
+      if flags > lib.STR2NR_FORCE then
+        test_vim_str2nr('-0548', flags, {len = 0}, 5)
+        test_vim_str2nr('-0548', flags, {len = 0}, 0)
+        test_vim_str2nr('-0548', flags, {len = 4, num = -44, unum = 44, pre = 0}, 5, false)
+        test_vim_str2nr('-0548', flags, {len = 4, num = -44, unum = 44, pre = 0}, 0, false)
+        test_vim_str2nr('-055', flags, {len = 4, num = -45, unum = 45, pre = 0}, 0)
+      else
+        test_vim_str2nr('-0548', flags, {len = 5, num = -548, unum = 548, pre = 0}, 5)
+        test_vim_str2nr('-0548', flags, {len = 5, num = -548, unum = 548, pre = 0}, 0)
+      end
+    end
+  end)
   itp('works with hexadecimal numbers', function()
     for _, flags in ipairs({
       lib.STR2NR_HEX,