Go release 1.22

Most changes are in the implementation of the toolchain, runtime, and libraries. Maintains the Go 1 promise of compatibility.

• For loop variables are now created anew for each iteration to avoid accidental sharing bugs.
• For loops can now range over integers.

• Commands in workspaces can use a vendor directory containing dependencies.
• go get is no longer supported outside of a module in legacy GOPATH mode.
• go test -cover now prints coverage summaries for packages without test files.

• Improves CPU performance by 1-3% by keeping type-based GC metadata nearer to heap objects.
• Reduces memory overhead by approximately 1%.
• Programs linking or loading Go libraries built with -buildmode=c-archive or -buildmode=c-shared on windows/amd64 can now use SetUnhandledExceptionFilter.

• Profile-guided Optimization (PGO) builds can devirtualize a higher proportion of calls.
• New heuristics to boost inlinability at call sites deemed important, enabled with GOEXPERIMENT=newinliner.

• The -s and -w flags behave more consistently across platforms.
• On ELF platforms, -B gobuildid generates a GNU build ID derived from the Go build ID.
• On Windows, -linkmode=internal now preserves SEH information from C object files.

Requires the final point release of Go 1.20 or later for bootstrap.

• New math/rand/v2 package with faster algorithms and improved seeding.
• New go/version package for validating and comparing Go version strings.
• Enhanced HTTP routing patterns in the standard library, including method and wildcard support.

• On macOS, the Go toolchain now generates position-independent executables (PIE) by default.
• GOARM environment variable now allows selection of software or hardware floating point.
• Experimental port to OpenBSD on big-endian 64-bit PowerPC.