[Tcl-bugs] [ tcl-Bugs-2837800 ] [glob] segfault searching dirs matching ~*

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Bugs item #2837800, was opened at 2009-08-14 13:57
Message generated for change (Comment added) made by dgp
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Category: 36. Pathname Management
Group: current: 8.5.7
Status: Open
Resolution: None
Priority: 9
Private: No
Submitted By: Don Porter (dgp)
Assigned to: Don Porter (dgp)
Summary: [glob] segfault searching dirs matching ~*

Initial Comment:

% file mkdir ./~goo
% close [open ./~goo/test w]
% glob [file join * test]
make: *** [shell] Segmentation fault


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>Comment By: Don Porter (dgp)
Date: 2009-08-14 15:41

Message:

A different variation of the same bug
in Tcl 8.4:

% file mkdir ./~dgp ;# empty directory
% glob */.mozilla
~dgp/.mozilla

The search in subdirectories of
the current directory is actually
finding something way over 
in my home directory instead.


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Comment By: Don Porter (dgp)
Date: 2009-08-14 14:38

Message:

The actual releases of Tcl 8.4, up through
8.4.19 are slightly better:

% glob */test
no files matched glob pattern "*/test"

It's a wrong result, but at least without
the empty error message demonstrated
in the tip of the core-8-4-branch.


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Comment By: Don Porter (dgp)
Date: 2009-08-14 14:34

Message:

8.3.5 works fine.

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Comment By: Don Porter (dgp)
Date: 2009-08-14 14:32

Message:

In Tcl 8.4, there is no crash, but
the incorrect result is not much better:

% glob [file join * test]

%

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Comment By: Don Porter (dgp)
Date: 2009-08-14 13:59

Message:

Stack trace from debug build of the
tip of the core-8-5-branch:

Program received signal SIGSEGV, Segmentation fault.
0x0807bf8a in Tcl_DbDecrRefCount (objPtr=0x0,
    file=0x8160368 "/home/dgp/cvs/tcl8.5/unix/../generic/tclPathObj.c",
    line=1690) at /home/dgp/cvs/tcl8.5/unix/../generic/tclObj.c:3153
3153        if (objPtr->refCount == 0x61616161) {
(gdb) bt
#0  0x0807bf8a in Tcl_DbDecrRefCount (objPtr=0x0,
    file=0x8160368 "/home/dgp/cvs/tcl8.5/unix/../generic/tclPathObj.c",
    line=1690) at /home/dgp/cvs/tcl8.5/unix/../generic/tclObj.c:3153
#1  0x080820c9 in Tcl_FSGetTranslatedPath (interp=0x89098d0,
pathPtr=0x89752d8)
    at /home/dgp/cvs/tcl8.5/unix/../generic/tclPathObj.c:1690
#2  0x080ad652 in TclpMatchInDirectory (interp=0x89098d0,
resultPtr=0x8974d10,
    pathPtr=0x89752d8, pattern=0x0, types=0x0)
    at /home/dgp/cvs/tcl8.5/unix/../unix/tclUnixFile.c:222
#3  0x080682ba in Tcl_FSMatchInDirectory (interp=0x89098d0,
    resultPtr=0x8974d10, pathPtr=0x89752d8, pattern=0x0, types=0x0)
    at /home/dgp/cvs/tcl8.5/unix/../generic/tclIOUtil.c:1102
#4  0x08145dc6 in DoGlob (interp=0x89098d0, matchesObj=0x8974d10,
    separators=0x816f602 "/", pathPtr=0x8975010, flags=1,
    pattern=0x897454a "test", types=0x0)
    at /home/dgp/cvs/tcl8.5/unix/../generic/tclFileName.c:2478
#5  0x08145941 in DoGlob (interp=0x89098d0, matchesObj=0x8974d10,
    separators=0x816f602 "/", pathPtr=0x0, flags=0,
    pattern=0x8974548 "*/test", types=0x0)
    at /home/dgp/cvs/tcl8.5/unix/../generic/tclFileName.c:2364
#6  0x08145010 in TclGlob (interp=0x89098d0, pattern=0x8974548 "*/test",
    pathPrefix=0x0, globFlags=0, types=0x0)
    at /home/dgp/cvs/tcl8.5/unix/../generic/tclFileName.c:1914
#7  0x0814471e in Tcl_GlobObjCmd (dummy=0x0, interp=0x89098d0, objc=1,
    objv=0x890ac6c) at
/home/dgp/cvs/tcl8.5/unix/../generic/tclFileName.c:1584
...

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