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patch 9.1.0181: no overflow check for string formatting

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Problem:  no overflow check for string formatting
Solution: Check message formatting function for overflow.
          (Chris van Willegen)

closes: #13799

Signed-off-by: Christ van Willegen <cvwillegen@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christ van Willegen
2024-03-14 18:30:41 +01:00
committed by Christian Brabandt
parent 010e1539d6
commit c35fc03dbd
4 changed files with 229 additions and 94 deletions
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5
runtime/doc/builtin.txt
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@@ -1,4 +1,4 @@
*builtin.txt* For Vim version 9.1. Last change: 2024 Mar 13
*builtin.txt* For Vim version 9.1. Last change: 2024 Mar 14
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -7105,6 +7105,9 @@ printf({fmt}, {expr1} ...) *printf()*
echo printf("%1$*2$.*3$f", 1.4142135, 6, 2)
< 1.41
You will get an overflow error |E1510|, when the field-width
or precision will result in a string longer than 6400 chars.
*E1500*
You cannot mix positional and non-positional arguments: >
echo printf("%s%1$s", "One", "Two")