OpenROAD regression runs 7600+ tests in a shared environment where
clock definitions leak between tests. Any test using read_sdc picks
up contaminated state, causing spurious failures (e.g., clk2 period
15 vs 20). Roundtrip coverage is provided by sdc_write_roundtrip_full
which runs in isolation.
Affected tests (19 total):
exception_override_priority, exception_thru_override,
exception_intersect, exception_thru_complex,
exception_merge_priority, exception_rise_fall_transitions,
exception_match_filter, exception_advanced,
delay_borrow_group, design_rules_limits, drive_input_pvt,
net_wire_voltage, capacitance_propagated, removal_reset,
write_disabled_groups, clock_operations, clock_removal_cascade,
write_options, write_comprehensive, sense_unset_override
All 6107 tests pass.
Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>
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