Boost C++ Libraries: Ticket #7810: zlib_error::check throws on Z_BUF_ERROR

m.hekkelman@… — Sat, 22 Dec 2012 18:43:39 GMT

Although I do believe the iostreams zlib wrapper code might run into problems, further investigation of my own code that triggered this report revealed that the file I was testing was truncated... duh. My bad, should have checked that first of course.

The problem here is the error code returned by zlib (Z_BUF_ERROR) which is a bit ambiguous.

The way the code is written in iostreams zlib wrapper might still throw an exception in a case where this is inappropriate. Working around this would need a kind of rainy day fund approach where a temp buffer should be used to expand remaining bytes in the zlib buffer.

Mon, 14 Sep 2015 12:30:53 GMT

This fix recovers Z_BUF_ERROR conditions successfully.

https://github.com/boostorg/iostreams/pull/17

Edward Diener — Fri, 09 Dec 2016 01:17:31 GMT

The fix causes problems with gzip so it has been backed out. A Z_BUF_ERROR throws an exception which the end-user should be prepared to catch so as to retry the zlib compression or decompression as appropriate.