Verilator 4.018 2019-08-29 released

[wsnyder]

Verilator 4.018 2019-08-29 released

Major:

• When showing an error, show source code and offer suggestions of replacements.
• When showing an error, show the instance location. (verilator/verilator#1305) [Todd Strader]

Notable:

• Add --rr. (verilator/verilator#1481) [Todd Strader]
• Change MULTITOP to warning to help linting, see manual.
• Add XSim support to driver.pl. (verilator/verilator#1493) [Todd Strader]

Other:

• Show included-from filenames in warnings. (verilator/verilator#1439) [Todd Strader]
• Fix elaboration time errors. (verilator/verilator#1429) [Udi Finkelstein]
• Fix not reporting some duplicate signals/ports. (verilator/verilator#1462) [Peter Gerst]
• Fix not in array context on non-power-of-two slices. (verilator/verilator#2027) [Yu Sheng Lin]
• Fix system compile flags injection. [Gianfranco Costamagna]
• Fix enum values not being sized based on parent. (verilator/verilator#1442) [Dan Petrisko]
• Fix internal error on gate optimization of assign. (verilator/verilator#1475) [Oyvind Harboe]
• Add --dpi-hdr-only. (verilator/verilator#1491) [Todd Strader]