After switching from go1.20.7 to go1.21.0 one of my applications
compiles without warnings or errors, but fails at run-time with the
following panic when loading a plugin:
panic: regexp: Compile(`^([\w./]+)/((?:\w+)|[*])(.+)?$`): error parsing
regexp: invalid escape sequence: `\w`
goroutine 1 [running]:
regexp.MustCompile({0x7fee026ddc4f, 0x1e})
.../golang/src/regexp/regexp.go:319 +0xb4
google.golang.org/grpc/internal/binarylog.init()
.../ext/pkg/mod/google.golang.org/grpc@v1.57.0/internal/binarylog/env_config.go:135
+0xf9
plugin.open({0xc0000146b0, 0xe})
.../golang/src/plugin/plugin_dlopen.go:95 +0x51c
plugin.Open(...)
.../golang/src/plugin/plugin.go:80
The above regex compiles fine in go1.21.0 directly, so I wonder what is
happening here.
After switching back to 1.20.7 and a full recompilation, the application
works fine again...
Cheers, Bernd.
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