Issues

• [feature request] Weakening compasion operators (e.g. === -> ==) when the type of LHS and RHS are known.

  google/closure-compiler#4352 · Filter by author sbc100 opened on Oct 2, 2026

• INTERNAL COMPILER ERROR: IllegalArgumentException in Es6NormalizeClasses$ClassRecord.recordPrivateMember when private field initializer is an identifier

  google/closure-compiler#4350 · Filter by author bullfest opened on Oct 1, 2026
  1

• CC incorrectly merges uninitialised let in a for loop body into an outer var in

  google/closure-compiler#4349 · Filter by author copy opened on Oct 1, 2026

• for-of IteratorClose transpilation (a60744c) adds ~5% to ES5 bundle size, even for typed Arrays

  google/closure-compiler#4345 · Filter by author joeyparrish opened on Sep 23, 2026
  3

  

• Internal compiler error (JSC_ILLEGAL_MODULE_RENAMING_CONFLICT) on duplicate var declarations in ES module mode

  google/closure-compiler#4344 · Filter by author sbc100 opened on Sep 18, 2026
  

• Robustness: malformed sourceMappingURL URI aborts the whole compile (uncaught RuntimeException); deps.js addDependency path and manifest lines written unescaped

  google/closure-compiler#4339 · Filter by author alencheung opened on Sep 11, 2026
  1

  

• Arbitrary file read via //# sourceMappingURL= path traversal in SourceMapResolver

  google/closure-compiler#4322 · Filter by author prasanna8585 opened on Jul 11, 2026
  2

  

• Template inference preserves fresh object-literal identity, causing false(?) type mismatch

  google/closure-compiler#4312 · Filter by author mnsaglam opened on Apr 21, 2026
  1

  

• How to describe classes with statics in a return type

  google/closure-compiler#4303 · Filter by author mnsaglam opened on Mar 10, 2026
  1

• Should new Uint8Array(arr) take ReadonlyArray<number> ?

  google/closure-compiler#4302 · Filter by author mnsaglam opened on Mar 2, 2026

• Logical assignment breaks on class static properties

  google/closure-compiler#4288 · Filter by author KyleDavidE opened on Jan 15, 2026
  10

  

• Implement support for private class fields and methods

  google/closure-compiler#4286 · Filter by author brad4d opened on Jan 8, 2026
  3

  

• WebGL2RenderingContext should not extend WebGLRenderingContext

  google/closure-compiler#4276 · Filter by author zbynek opened on Dec 4, 2025
  4

• Add extern for W3C Media Session API

  google/closure-compiler#4273 · Filter by author avelad opened on Nov 24, 2025

• Should transform "x ? true : false" into "!!x" and "x ? false : true" into "!x"

  enhancement
  google/closure-compiler#4270 · Filter by author TomasRiker opened on Nov 16, 2025
  2

• CrossChunkCodeMotion breaks --chunk_output_type ES_MODULES

  google/closure-compiler#4264 · Filter by author DavidANeil opened on Sep 24, 2025
  2

  

• Update Web Speech API externs

  google/closure-compiler#4262 · Filter by author avelad opened on Sep 22, 2025

• ES2022 Error option in constructor is not polyfilled

  P4
  google/closure-compiler#4233 · Filter by author jzhan-canva opened on Apr 16, 2025
  1

• "A terminally deprecated method in sun.misc.Unsafe has been called"

  internal-issue-createdtriage-done
  google/closure-compiler#4229 · Filter by author hills opened on Mar 21, 2025
  8

  

• Publish closure compiler to registry.bazel.build

  google/closure-compiler#4224 · Filter by author christianscott opened on Feb 25, 2025
  5

• Poor constant propagation through destructuring assignments

  google/closure-compiler#4219 · Filter by author mnsaglam opened on Feb 10, 2025
  2

• Advanced compiled code works differently if referencing .constructor

  google/closure-compiler#4216 · Filter by author liborek opened on Jan 30, 2025
  1

• Standard scriptlets, jo <? ... ?> syntax ka upyog

  google/closure-compiler#4205 · Filter by author mudassarmuz opened on Dec 19, 2024
  1

• ICE: Cannot read field "references" because "referenceInfo" is null

  google/closure-compiler#4200 · Filter by author RuifengFu opened on Nov 15, 2024
  1

• Type checking const "this.*" incorrectly checks outside of scope where names overlap

  google/closure-compiler#4197 · Filter by author hills opened on Oct 24, 2024
  2