v9.1

Fixes

• Non-blocking assignments with intra-assignment delays are now correctly allowed in always_comb blocks
• Fixed enum base type check to properly error for multidimensional vector types
• An appropriate error is now issued for enums that specify themselves as their own base type
• Fixed a bug when parsing multiple comma separated type parameter declarations in a module port list
• Fixed a bug in the accounting of how many nested for loop steps have been taken during dataflow analysis
• Fixed AST serialization to respect the --disable-instance-caching flag
• Fixed the check for infinite recursion in hierarchy instantiations to actually work
• Fixed potentially infinite recursion when evaluating variable initializers in a recursive function
• Fixed potentially infinite recursion with bad for loops with a preceeding statement label
• Fixed various issues related to handling invalid patterns in conditional statements
• Fixed a crash when evaluating top-level constant expression with pattern variables
• We now properly report an error instead of crashing for subroutine formal arguments that call their parent function recursively from their default value expression
• Fixed a crash in the preprocessor when there are ignored back-to-back macro concatenation tokens inside a macro expansion
• Fixed check for use of rand variables in dist constraints to work with struct member access
• Fixed spurious error when using $ in dist constraints
• Fixed a bug that could cause diagnostics to be issued for assertions used within uninstantiated generate blocks
• Fixed a bug that could cause "used before declared" errors to be issued for use of super class members in derived classes
• Fixed a crash that could occur when the lexer gives up due to too many errors while parsing a pragma preprocessor directive

Tools & Bindings

slang-tidy

• Fixed a crash in OnlyANSIPortDecls checker when ports don't connect to an internal symbol (thanks to @likeamahoney)
• Fixed assertion in EnforcePortSuffix checker with ports that don't have a name (thanks to @likeamahoney)
• Fixed a crash when an invalid value is provided for the --code flag (thanks to @likeamahoney)
• Made the --dump-config option actually work correctly (thanks to @likeamahoney)