[Issue 1557] New: std.zlib allocates void[]s instead of ubyte[]s, causing leaks.

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1557

           Summary: std.zlib allocates void[]s instead of ubyte[]s, causing
                    leaks.
           Product: D
           Version: 1.022
          Platform: PC
               URL: http://www.digitalmars.com/webnews/newsgroups.php?art_gr
                    oup=digitalmars.D&article_id=59880
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: fvbommel at wxs.nl


std.zlib allocates buffers as void[]s instead of ubyte[]s. While in each
instance std.gc.hasNoPointers is promptly called on the result, there are
concatenations performed with void[] arrays and those don't preserve that
attribute.

The URL entered is to a discussion of this bug in digitalmars.D, though it
manifested in relation to GDC and I haven't verified a memory leak actually
exists in the DMD version. However, the module is nearly identical and AFAIK
the GC hasn't been upgraded since the version GDC was based on (1.020) either.

I'm attaching a patch against DMD 1.022 std.zlib with the following changes:
1) I changed all newly-allocated arrays to ubyte[] instead of void[].
2) I also took the opportunity to change some cast(ubyte*)s on those void[]s to
uses of the .ptr property.
3) std.gc.hasNoPointers() is no longer needed; I removed all calls to it and
removed the import.

I haven't extensively tested correctness. However this patch is rather trivial,
the changed code compiles and the unit test succeeds so I don't think I
could've broken anything.


--