bugmake - Bugs: bug #24588, $$(eval) with SECONDEXPANSION...


bug #24588: $$(eval) with SECONDEXPANSION causes segmentation faults

Submitter:  Lars S. Jessen <ljessen>
Submitted:  Fri 17 Oct 2008 08:53:14 AM UTC
Severity:  3 - Normal Item Group:  Bug
Status:  Fixed Privacy:  Public
Assigned to:  psmith Open/Closed:  Closed
Component Version:  3.81 Operating System:  Any
Fixed Release:  3.82 Triage Status:  None
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Thu 04 Jun 2009 05:39:49 AM UTC, comment #3: 

Fixed using a change almost identical to yours.  Thanks!

Paul D. Smith <psmith>
Group administrator
Mon 01 Jun 2009 11:15:25 AM UTC, comment #2: 

See also duplicate bug #24622 for another example.

Paul D. Smith <psmith>
Group administrator
Fri 17 Oct 2008 10:55:40 AM UTC, comment #1: 

Problem is caused by eval_buffer() assuming reading_file != NULL, this is not the case during the secondexpansion phase.
Solution: initialize ebuf.floc.filenm to NULL and only set ebuf.floc = *reading_file when reading_file != NULL.
See attached patch.

(file #16687)

Lars S. Jessen <ljessen>
Fri 17 Oct 2008 08:53:14 AM UTC, original submission:  

$$(eval) with SECONDEXPANSION enabled causes make to crash with a segmentation fault.

The following, very simple, makefile reproduces the crash:

$ cat Makefile

all : $$(eval $$(info test))

$ make
Segmentation fault

Lars S. Jessen <ljessen>


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Attach Files:

Attached Files
file #16687:  fix24588.patch added by ljessen (729B - text/x-diff - Patch for read.c rev 1.169)


Depends on the following items: None found

Items that depend on this one: None found


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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2010-07-28 psmith Fixed Release4.0 3.82
    2009-06-04 psmith StatusNone Fixed
        Assigned toNone psmith
        Open/ClosedOpen Closed
        Fixed ReleaseNone 4.0
    2008-10-17 ljessen Attached File- Added fix24588.patch, #16687

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