[PD-dev] [pure-data:patches] #578 fix for crash in canvas_initbang() when loading malformed patch files

[Claude Heiland-Allen]

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** [patches:#578] fix for crash in canvas_initbang() when loading malformed patch files**

**Status:** open
**Group:** bugfix
**Labels:** crash 
**Created:** Sat Jun 25, 2016 08:33 PM UTC by Claude Heiland-Allen
**Last Updated:** Sat Jun 25, 2016 08:33 PM UTC
**Owner:** Miller Puckette
**Attachments:**

- [0001-fix-canvas_initbang-crash-when-loading-bad-patch-fil.patch](https://sourceforge.net/p/pure-data/patches/578/attachment/0001-fix-canvas_initbang-crash-when-loading-bad-patch-fil.patch) (1.6 kB; text/x-patch)


Pd crashes in canvas_initbang() if you load a file that isn't really a patch, because binbuf_evalfile() assumes the file is a regular patch that created a canvas during evaluation.  The fix is to check that the #X symbol is really bound to a canvas before calling canvas_initbang() on its thing.

For an example of the crash:

    echo oops > oops.pd
    pd oops.pd

With the attached patch Pd no longer crashes and instead prints "oops: no such object".



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