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![]() With no error handler installed, an error leads to an (internal panic and) immediate abort of type checking. Not all invariants hold up in this case, but it also doesn't matter. In Checker.infer, verify result conditions always if an error handler is installed, but only then. Fixes #61938. Change-Id: I4d3d61bbccc696a75639fee5010f5d3cef17e855 Reviewed-on: https://go-review.googlesource.com/c/go/+/519775 Reviewed-by: Robert Findley <rfindley@google.com> Run-TryBot: Robert Griesemer <gri@google.com> Auto-Submit: Robert Griesemer <gri@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@google.com> |
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Vendoring in std and cmd ======================== The Go command maintains copies of external packages needed by the standard library in the src/vendor and src/cmd/vendor directories. There are two modules, std and cmd, defined in src/go.mod and src/cmd/go.mod. When a package outside std or cmd is imported by a package inside std or cmd, the import path is interpreted as if it had a "vendor/" prefix. For example, within "crypto/tls", an import of "golang.org/x/crypto/cryptobyte" resolves to "vendor/golang.org/x/crypto/cryptobyte". When a package with the same path is imported from a package outside std or cmd, it will be resolved normally. Consequently, a binary may be built with two copies of a package at different versions if the package is imported normally and vendored by the standard library. Vendored packages are internally renamed with a "vendor/" prefix to preserve the invariant that all packages have distinct paths. This is necessary to avoid compiler and linker conflicts. Adding a "vendor/" prefix also maintains the invariant that standard library packages begin with a dotless path element. The module requirements of std and cmd do not influence version selection in other modules. They are only considered when running module commands like 'go get' and 'go mod vendor' from a directory in GOROOT/src. Maintaining vendor directories ============================== Before updating vendor directories, ensure that module mode is enabled. Make sure that GO111MODULE is not set in the environment, or that it is set to 'on' or 'auto'. Requirements may be added, updated, and removed with 'go get'. The vendor directory may be updated with 'go mod vendor'. A typical sequence might be: cd src go get golang.org/x/net@master go mod tidy go mod vendor Use caution when passing '-u' to 'go get'. The '-u' flag updates modules providing all transitively imported packages, not only the module providing the target package. Note that 'go mod vendor' only copies packages that are transitively imported by packages in the current module. If a new package is needed, it should be imported before running 'go mod vendor'.