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Changelog

All notable changes to this fork will be documented in this file.

This project is a maintained fork of traefik/yaegi.

v0.17.0 - 2026-02-22

Breaking Changes

  • Module path changed from github.com/traefik/yaegi to github.com/GoCodeAlone/yaegi
    • Update your imports accordingly
  • Minimum Go version raised to Go 1.26

Added

  • Generic function imports (upstream PR #1647): Import generic functions from extracted Go code as interpreted code using //yaegi:add comment directive. Generic code is wrapped in GenericFunc string type for runtime interpretation.
  • Extract speedup (upstream PR #1642): 11-45x performance improvement for yaegi extract by switching from go/importer to golang.org/x/tools/go/packages with caching support.
  • Extract outer arg (upstream PR #1638): New Outer field on Extractor struct to support generating import code outside the standard stdlib path.
  • Extract underscore params (upstream PR #1708): yaegi extract now correctly handles underscore parameter names in interfaces, generating proper wrapper code.
  • Eval/EvalPath panic recovery (upstream PR #1560): Eval() and EvalPath() now recover from internal panics and return them as Panic errors with call stacks, preventing interpreted code from crashing the host process.

Fixed

  • Binary channel type alias nil pointer (GoCodeAlone): Fixed nil pointer dereference when sending to a channel that is a type alias defined in a binary package. The send function now uses the elem() method which correctly handles both source-defined channels and binary type aliases.
  • Re-import of identical package (upstream PR #1551): Fixed false "redeclared in this block" errors when the same binary package is imported across multiple source files during multi-pass type analysis.
  • Binary-to-source interface conversion (upstream PR #1562): Fixed interface type assertion between binary and source interfaces, allowing proper conversion when interfaces are defined in both compiled and interpreted code.
  • Nil type error masking (GoCodeAlone): Generic type constraint nil type check no longer masks more specific error messages (e.g., "non-constant array bound" errors are now properly reported).
  • Generic type constraint crash (upstream PR #1647): Fixed nil type crash when using generic type constraint interfaces, returning a descriptive error instead of panicking.
  • isGeneric nil guard (upstream PR #1647): Added nil safety check in isGeneric() to prevent panics when checking function type nodes.

Changed

  • Upgraded golang.org/x/tools from v0.22.0 to v0.42.0
  • Upgraded golang.org/x/mod from v0.18.0 to v0.33.0
  • Upgraded golang.org/x/sync from v0.7.0 to v0.19.0
  • Applied go fix modernization (144 fixes across 16 files)
  • Applied go fmt formatting updates

Upstream PRs Incorporated

PR Title Author
#1551 Fix re-import of identical package @he11olx
#1560 Recover in Eval and EvalPath @Bai-Yingjie
#1562 Fix bin interface to src interface conversion @laushunyu
#1638 Add outer arg for extract command @ludanfeng
#1642 Use x/tools/go/packages for extract speedup @kkoreilly
#1647 Import generic functions from extracted code @rcoreilly
#1708 Extract: support underscore params @nelsam