freeMagic called with NULL argument message when processing gds

[d-m-bailey]

magic sometimes produces freeMagic called with NULL argument message when processing cells after reading gds.

Version 8.3.328

Sample output

Reading "output_buffer".
Reading "sky130_fd_pr__pfet_01v8_lvt_75KH85".
Reading "BGR_lvs".
Reading "VCO".
Reading "sloci_top3".
Reading "user_analog_project_wrapper".
Processing sky130_fd_pr__res_xhigh_po_5p73_UZMRKM
freeMagic called with NULL argument.
Processing XM_Rref
freeMagic called with NULL argument.
Processing sky130_fd_pr__rf_pnp_05v5_W3p40L3p40
freeMagic called with NULL argument.
Processing XM_bjt
freeMagic called with NULL argument.
Processing XM_bjt_out
freeMagic called with NULL argument.

To reproduce, download tarball and extract.

cd test_freeMagic
./run_ext

This will perform 2 extractions. One extracts without freeMagic called with NULL argument messages and one with. user_analog_project_wrapper.nowell.ext.log has error messages while

user_analog_project_wrapper.ext.log does not.

user_analog_project_wrapper.nowell.ext.log was created using a rule file modified to ignore well connections. test_freeMagic.tar.gz

[RTimothyEdwards]

Looks like an innocuous error where a variable should have been checked to see if it is NULL before calling freeMagic(). I have fixed the root cause of the problem (magic version 8.3.329).