tact-lang/tact v1.6.8

Release 1.6.8

on GitHub

Breaking changes

• [stdlib] Compiler now reports an error if VarAddress or parseVarAddress() is used, since starting
  from TVM 10 they are mostly not supported: PR #3067.

Language features

• [fix] Compiler now correctly handles optional slices, builders, and strings when generating serialization logic: PR #3053
• [fix] Compiler now disallows type usages as value (e.g. let x = Int or let x = MyStruct): PR #3065

Code generation

• Use FunC and Fift WASM build v2025.04: PR #3077

Tooling

• [fix] Formatter now correctly handles floating comments: PR #2995
• [fix] Formatter now correctly handles inline comments after the last declaration: PR #3064
• [fix] Formatter now correctly handles floating comments after import: PR #3071
• [fix] Formatter now better supports comments inside chained method calls: PR #3070

Docs

• Enabled format checking across the Cookbook: PR #2980
• Added references to https://github.com/tact-lang/defi-cookbook: PR #2985
• Added description of the "unreachable code" errors and enhanced the descriptions of the return statement: PR #2750
• Fixed description of the unary plus + operator: PR #3016
• Documented that map key-value types and the inner message type of the bounced<M> type constructor cannot be nullable: PR #3017
• Lowercased "Struct" everywhere except at the beginning of sentences: PR #3021
• Reworked the optionals page: PR #3002

Release contributors

• Novus Nota
• Petr Makhnev
• Daniil Sedov
• skywardboundd
• xpyctumo