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ABC regression

pending-verificationThis issue is pending verification and/or reproductionThis issue is pending verification and/or reproduction

Status: Open.

#5802 In YosysHQ/yosys;

· donnie-j opened on Apr 14, 2026

Timeout during "Executing ABC pass (technology mapping using ABC)" on nangate45/ariane133 design

pending-verificationThis issue is pending verification and/or reproductionThis issue is pending verification and/or reproduction

Status: Open.

#5801 In YosysHQ/yosys;

· eder-matheus opened on Apr 9, 2026

$specrule has inconsistent enable port naming

bug

Status: Open.

#5800 In YosysHQ/yosys;

· widlarizer opened on Apr 9, 2026

Regression: "ERROR: Don't know how to detect sign and width for AST_AUTOWIRE node!"

bug

error-handlingError handling and reportingError handling and reporting

Status: Open.

#5797 In YosysHQ/yosys;

· spth opened on Apr 8, 2026

read_verilog -sv crashes with internal assert on malformed input (empty if-body + declaration)

error-handlingError handling and reportingError handling and reporting

Status: Open.

#5787 In YosysHQ/yosys;

· yiidtw opened on Mar 30, 2026

Feature request: allow using a reset signal to derive post-reset initial states

feature-request

Status: Open.

#5779 In YosysHQ/yosys;

· gipsyh opened on Mar 27, 2026

syn fail

pending-verificationThis issue is pending verification and/or reproductionThis issue is pending verification and/or reproduction

Status: Open.

#5767 In YosysHQ/yosys;

· PengYuLee opened on Mar 20, 2026

functional error in the edif generated by the serial port program.

pending-verificationThis issue is pending verification and/or reproductionThis issue is pending verification and/or reproduction

Status: Open.

#5754 In YosysHQ/yosys;

· LOCKEDGATE opened on Mar 18, 2026

chparam values are unsigned when using read_verilog frontend

pending-verificationThis issue is pending verification and/or reproductionThis issue is pending verification and/or reproduction

Status: Open.

#5745 In YosysHQ/yosys;

· KrystalDelusion opened on Mar 12, 2026

opt_dff unsound init handling assumes opt_clean

bug

Status: Open.

#5735 In YosysHQ/yosys;

· widlarizer opened on Mar 9, 2026

Yosys EXTRACT_FA crash: consteval.h:83 assertion failed when extracting adders from flattened design

error-handlingError handling and reportingError handling and reporting

fuzzerFuzzer generated issueFuzzer generated issue

Status: Open.

#5720 In YosysHQ/yosys;

· yusheng-ll opened on Mar 2, 2026

User control over latch inference

feature-request

Status: Open.

#5719 In YosysHQ/yosys;

· widlarizer opened on Mar 2, 2026