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ID Category Severity Reproducibility Date Submitted Last Update
0010941 [DCSS] Bug Report minor always 2017-02-14 16:14 2017-03-12 19:14
Reporter advil View Status public  
Assigned To neil
Priority normal Resolution done  
Status closed   Product Branch 0.21 ancient branch
Summary 0010941: bug in local tiles CPRINTF / _cprintf_touchui
Description This code path calls a printf-like with the output of another printf-like as a format string, so escaped `%%` will get swallowed. At its most innocuous this just doesn't print %s (you can see this on local tiles with the next experience level display, which should have a %), but if you give it something like "%%s" you get "(null)". (I couldn't generate a crash but there may be ways.)

The problem is in _cprintf_touchui, with the chaining of the following two lines (setting aside the small screen stuff):

buf = vmake_stringf(format, args);

and then later


A hacky quick fix might be to change the latter to
cprintf("%s", buf.c_str());
, but one way or another buf shouldn't be reused as a format strong.
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neil (administrator)
2017-02-14 16:22

Fixed in trunk (0.20-a0-643-gdc5f830) and stable (0.19.4-9-g45fd643), thanks!

- Issue History
Date Modified Username Field Change
2017-02-14 16:14 advil New Issue
2017-02-14 16:22 neil Note Added: 0031484
2017-02-14 16:22 neil Status new => resolved
2017-02-14 16:22 neil Fixed in Branch => 0.19 stable branch
2017-02-14 16:22 neil Resolution open => done
2017-02-14 16:22 neil Assigned To => neil
2017-03-12 19:14 advil Status resolved => closed

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