[Tcl-bugs] [ tcl-Bugs-3532959 ] free lambda after interp -> crash

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Bugs item #3532959, was opened at 2012-06-07 13:27
Message generated for change (Comment added) made by dgp
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Category: 22. [proc] and [uplevel]
Group: current: 8.5.11
Status: Open
Resolution: None
Priority: 9
Private: No
Submitted By: Don Porter (dgp)
Assigned to: Andreas Kupries (andreas_kupries)
Summary: free lambda after interp -> crash

Initial Comment:
% set lambda x
x
% lappend lambda {set a 1}
x {set a 1}
% interp create slave
slave
% slave eval [list apply $lambda foo]
1
% interp delete slave
% unset lambda
/bin/sh: line 2: 23642 Segmentation fault      ./tclsh


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>Comment By: Don Porter (dgp)
Date: 2012-06-08 08:56

Message:
WIP on bug-3532959

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Comment By: Don Porter (dgp)
Date: 2012-06-08 08:38

Message:
Contributing to the problem in this example
is that TclProcCleanupProc is crashing attempting
to clear away data it never stored in the first place.

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Comment By: miguel sofer (msofer)
Date: 2012-06-07 15:28

Message:
Freeing a lambda's internal rep requires access to the interp, purely for
tip-280 related data management. Not sure what to do about that,
reassigning to aku.

Attaching valgrind's view of the crash on current tip of core-8-5-branch.

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