Release v0.71.0

0.71.0 - 11-01-2021

Added

• Metavariable equality is enforced across sources/sanitizers/sinks in
  taint mode, and these metavariables correctly appear in match messages
• Pre-alpha support for Bash as a new target language
• Pre-alpha support for C++ as a new target language
• Increase soft stack limit when running semgrep-core (#4120)
• semgrep --validate runs metachecks on the rule

Fixed

• text_wrapping defaults to MAX_TEXT_WIDTH if get_terminal_size reports
  width < 1
• Metrics report the error type of semgrep core errors (Timeout,
  MaxMemory, etc.)
• Prevent bad settings files from crashing Semgrep (#4164)
• Constant propagation: Tuple/Array destructuring assignments now correctly
  prevent constant propagation
• JS: Correctly parse metavariables in template strings
• Scala: parse underscore separators in number literals, and parse
  'l'/'L' long suffix on number literals
• Scala: parse by name arguments in arbitary function types,
  like (=> Int) => Int
• Bash: various fixes and improvements
• Kotlin: support ellipsis in class body and parameters (#4141)
• Go: support method interface pattern (#4172)

Changed

• Report CI environment variable in metrics for better environment
  determination
• Bash: a simple expression pattern can now match any command argument rather
  than having to match the whole command