DRT: Segfault with post DRT antenna repair

[gadfort]

Describe the bug

On the second iteration of antenna repair, I'm getting a segfault in repair_antenna

Expected Behavior

No segfault.

Environment

Head of master

To Reproduce

sc_issue_picorv32_GF180_4LM_1TM_6K_7t_route.detailed_antenna_repair_0_20260815-202616.tar.gz

tar xvf sc_issue_picorv32_GF180_4LM_1TM_6K_7t_route.detailed_antenna_repair_0_20260815-202616.tar.gz
cd sc_issue_picorv32_GF180_4LM_1TM_6K_7t_route.detailed_antenna_repair_0_20260815-202616
./run.sh

Note is takes about an hour to get to the second iteration.

Relevant log output

[INFO DRT-0180] Post processing.
[INFO DRT-0501] Runtime: 4318.91s
[INFO ANT-0002] Found 2 net violations.
[INFO ANT-0001] Found 2 pin violations.
Starting antenna repair iteration 2 of 5 with gf180mcu_fd_sc_mcu7t5v0__antenna cell
repair_antennas siliconcompiler arguments: gf180mcu_fd_sc_mcu7t5v0__antenna -ratio_margin 0
Signal 11 received
Stack trace:
 0# 0x00000000020AC745 in /home/gadfort/.local/bin/openroad
 1# 0x0000000000045330 in /lib/x86_64-linux-gnu/libc.so.6
 2# 0x0000000005356570 in /home/gadfort/.local/bin/openroad
 3# 0x0000000005367450 in /home/gadfort/.local/bin/openroad
 4# 0x0000000004065BA4 in /home/gadfort/.local/bin/openroad
 5# 0x0000000004066113 in /home/gadfort/.local/bin/openroad
 6# 0x000000000405A38A in /home/gadfort/.local/bin/openroad
 7# 0x0000000003FC0AE9 in /home/gadfort/.local/bin/openroad
 8# 0x0000000003F9B2BE in /home/gadfort/.local/bin/openroad
 9# 0x000000000236539C in /home/gadfort/.local/bin/openroad
10# 0x00000000056A5183 in /home/gadfort/.local/bin/openroad
11# 0x00000000056A6519 in /home/gadfort/.local/bin/openroad
12# 0x00000000056A5A5A in /home/gadfort/.local/bin/openroad
13# 0x00000000055B2B29 in /home/gadfort/.local/bin/openroad
14# 0x00000000020AFF01 in /home/gadfort/.local/bin/openroad
15# 0x00000000020AC9F9 in /home/gadfort/.local/bin/openroad
16# 0x000000000577831C in /home/gadfort/.local/bin/openroad
17# 0x00000000020AC5FC in /home/gadfort/.local/bin/openroad
18# 0x000000000002A1CA in /lib/x86_64-linux-gnu/libc.so.6
19# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
20# 0x00000000020AB68A in /home/gadfort/.local/bin/openroad

Screenshots

No response

Additional Context

No response