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c9b0b07853
Packages P1 and P2 can define identical struct types T1 and T2, and one can convert from type T1 to T2 or vice versa. The spec defines two identical struct types as: Two struct types are identical if they have the same sequence of fields, and if corresponding fields have the same names, and identical types, and identical tags. Non-exported field names from different packages are always different. Unfortunately, garble broke this: since we obfuscated field names differently depending on the package, cross-package conversions like the case above would result in typechecking errors. To fix this, implement Joe Tsai's idea: hash struct field names with the string representation of the entire struct. This way, identical struct types will have their field names obfuscated in the same way in all packages across a build. Note that we had to refactor "reverse" a bit to start using transformer, since now it needs to keep track of struct types as well. This failure was affecting the build of google.golang.org/protobuf, since it makes regular use of cross-package struct conversions. Note that the protobuf module still fails to build, but for other reasons. The package that used to fail now succeeds, so the build gets a bit further than before. #240 tracks adding relevant third-party Go modules to CI, so we'll track the other remaining failures there. Fixes #310. |
3 years ago | |
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| bench-cache | 3 years ago | |
| bench-nocache | 3 years ago | |
| mod | 3 years ago | |
| scripts | 3 years ago | |