panic: interface conversion: interface {} is maps.ParamsMergeStrategy, not maps.Params

[thomasweitzel]

What version of Hugo are you using (hugo version)?

$ hugo version
hugo v0.112.5-48e33e10af2feb2a0e1c32d04880ed016619f2d8+extended linux/amd64 BuildDate=2023-05-29T07:27:36Z VendorInfo=gohugoio

Does this issue reproduce with the latest release?

Yes (0.112.5).

Description

$ hugo --verbose
Total in 0 ms
panic: interface conversion: interface {} is maps.ParamsMergeStrategy, not maps.Params

goroutine 1 [running]:
github.com/gohugoio/hugo/config/allconfig.glob..func20({{0x236449a, 0x9}, 0x2616e90, 0x0, 0x0}, {{0x2a18c30, 0xc0000bde80}, 0xc0009b4800, {0x2a17ce0, 0x3bee260}, ...})
        /root/project/hugo/config/allconfig/alldecoders.go:249 +0x1fb
github.com/gohugoio/hugo/config/allconfig.decodeConfigFromParams({0x2a17ce0, 0x3bee260}, {{0xc00004e084, 0x36}, {0xc00060ea80, 0x10}, {0xc00004fb80, 0x3d}, {0x0, 0x0}}, ...)
        /root/project/hugo/config/allconfig/allconfig.go:866 +0x3e6
github.com/gohugoio/hugo/config/allconfig.fromLoadConfigResult({0x2a17ce0, 0x3bee260}, {0x2a1b170, 0xc0002fd5f0}, {{0x2a18c30, 0xc0000bde80}, {0xc00009ee80, 0x1, 0x1}, {{0xc00004e084, ...}, ...}})
        /root/project/hugo/config/allconfig/allconfig.go:683 +0x231
github.com/gohugoio/hugo/config/allconfig.LoadConfig({{0x2a17ce0, 0x3bee260}, {0x2a1b170, 0xc0002fd5f0}, {0x2a18c30, 0xc0000bde40}, {0x0, 0x0}, {0x2350dbb, 0x6}, ...})
        /root/project/hugo/config/allconfig/load.go:61 +0x49b
github.com/gohugoio/hugo/commands.(*rootCommand).ConfigFromProvider.func1(0x2fd688?)
        /root/project/hugo/commands/commandeer.go:219 +0x358
github.com/bep/lazycache.(*Cache[...]).GetOrCreate(0x2a29ea0, 0x0, 0xc000e7b9c0?)
        /root/project/gomodcache/github.com/bep/lazycache@v0.2.0/lazycache.go:112 +0x142
github.com/gohugoio/hugo/commands.(*rootCommand).ConfigFromProvider(0xc0000bcd00?, 0x2a18c30?, {0x2a18c30, 0xc0000bde40})
        /root/project/hugo/commands/commandeer.go:195 +0x68
github.com/gohugoio/hugo/commands.(*hugoBuilder).loadConfig(0xc0001f5400, 0x0?, 0x0)
        /root/project/hugo/commands/hugobuilder.go:1017 +0x3aa
github.com/gohugoio/hugo/commands.(*rootCommand).Run(0xc000281a40, {0x0?, 0x0?}, 0x0?, {0x0?, 0x0?, 0x0?})
        /root/project/hugo/commands/commandeer.go:339 +0xf1
github.com/bep/simplecobra.(*Commandeer).compile.func1(0xc000005800?, {0xc000615d50?, 0x1?, 0x1?})
        /root/project/gomodcache/github.com/bep/simplecobra@v0.3.1/simplecobra.go:113 +0x52
github.com/spf13/cobra.(*Command).execute(0xc000005800, {0xc0001a4010, 0x1, 0x1})
        /root/project/gomodcache/github.com/spf13/cobra@v1.7.0/command.go:940 +0x862
github.com/spf13/cobra.(*Command).ExecuteC(0xc000005800)
        /root/project/gomodcache/github.com/spf13/cobra@v1.7.0/command.go:1068 +0x3bd
github.com/spf13/cobra.(*Command).ExecuteContextC(...)
        /root/project/gomodcache/github.com/spf13/cobra@v1.7.0/command.go:1001
github.com/bep/simplecobra.(*Exec).Execute(0xc000690258, {0x2a0c718?, 0xc0001a8000?}, {0xc0001a4010?, 0x509b88?, 0xc000182168?})
        /root/project/gomodcache/github.com/bep/simplecobra@v0.3.1/simplecobra.go:155 +0xd9
github.com/gohugoio/hugo/commands.Execute({0xc0001a4010, 0x1, 0x1})
        /root/project/hugo/commands/commandeer.go:65 +0x312
main.main()
        /root/project/hugo/main.go:25 +0x65

I didn't have the problem with 0.111.3. Running hugo config produces the same stacktrace. My config didn't change (still working with 0.111.3), but I suspect it has something to do with it. Here it is (redacted, reduced to the minimal example that produces the panic):

baseURL = "https://example.org"
languageCode = "en-us"
title = "Blog of me"
defaultContentLanguage = "en"

[languages]
  [en]
    lang = "en"
    languageName = "English"
    weight = 1

[thomasweitzel]

Found the problem. It should be languages.en:

[languages]
  [languages.en]
    lang = "en"
    languageName = "English"
    weight = 1

So it was my fault. Even though it worked without the prefix in 0.111.3.

[bep]

But we should not panic on these errors. I will fix that.

[github-actions]

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