Go generate does not work on newer systems

[cam72cam]

First issue I encountered was:

unicode2ragel.rb:85:in `initialize': No such file or directory @ rb_sysopen - http://www.unicode.org/Public/9.0.0/ucd/DerivedCoreProperties.txt (Errno::ENOENT)
        from unicode2ragel.rb:85:in `open'
        from unicode2ragel.rb:85:in `each_alpha'
        from unicode2ragel.rb:292:in `generate_machine'
        from unicode2ragel.rb:334:in `block in <main>'
        from unicode2ragel.rb:334:in `each'
        from unicode2ragel.rb:334:in `<main>'
hclsyntax/generate.go:7: running "ruby": exit status 1

Which was fixed by:

diff --git a/hclsyntax/unicode2ragel.rb b/hclsyntax/unicode2ragel.rb
index 235265d..f7b652e 100644
--- a/hclsyntax/unicode2ragel.rb
+++ b/hclsyntax/unicode2ragel.rb
@@ -82,7 +82,7 @@ end
 # range and description.
 
 def each_alpha( url, property ) 
-  open( url ) do |file|
+  URI.open( url ) do |file|
     file.each_line do |line|
       next if line =~ /^#/;
       next if line !~ /; #{property} #/;

Second issue is a panic when running with go1.22.2:

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
        panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x5a6c4f]

goroutine 49 [running]:
go/types.(*Checker).handleBailout(0xc0003a1600, 0xc0005f3bd0)
        /usr/lib/go-1.22/src/go/types/check.go:367 +0x88
panic({0x65dc60?, 0x85d570?})
        /usr/lib/go-1.22/src/runtime/panic.go:770 +0x132
go/types.(*StdSizes).Sizeof(0x0, {0x6fccd0, 0x8605a0})
        /usr/lib/go-1.22/src/go/types/sizes.go:228 +0x30f
go/types.(*Config).sizeof(...)
        /usr/lib/go-1.22/src/go/types/sizes.go:333
go/types.representableConst.func1({0x6fccd0?, 0x8605a0?})
        /usr/lib/go-1.22/src/go/types/const.go:76 +0x9e
go/types.representableConst({0x6fe850, 0x855ec0}, 0xc0003a1600, 0x8605a0, 0x0)
        /usr/lib/go-1.22/src/go/types/const.go:92 +0x192
go/types.(*Checker).arrayLength(0xc0003a1600, {0x6fe388, 0xc0004ea5c0?})
        /usr/lib/go-1.22/src/go/types/typexpr.go:510 +0x2d3
go/types.(*Checker).typInternal(0xc0003a1600, {0x6fdc98, 0xc0002a1dd0}, 0xc000d43860)
        /usr/lib/go-1.22/src/go/types/typexpr.go:299 +0x49d
go/types.(*Checker).definedType(0xc0003a1600, {0x6fdc98, 0xc0002a1dd0}, 0x40b087?)
        /usr/lib/go-1.22/src/go/types/typexpr.go:180 +0x37
go/types.(*Checker).typeDecl(0xc0003a1600, 0xc000d43860, 0xc0004ec580, 0x0)
        /usr/lib/go-1.22/src/go/types/decl.go:615 +0x44d
go/types.(*Checker).objDecl(0xc0003a1600, {0x700cb8, 0xc000d43860}, 0x0)
        /usr/lib/go-1.22/src/go/types/decl.go:197 +0xa7f
go/types.(*Checker).ident(0xc0003a1600, 0xc0004fca00, 0xc000459c60, 0x0, 0x1)
        /usr/lib/go-1.22/src/go/types/typexpr.go:62 +0x250
go/types.(*Checker).typInternal(0xc0003a1600, {0x6fdb48, 0xc000459c60}, 0x0)
        /usr/lib/go-1.22/src/go/types/typexpr.go:241 +0x605
go/types.(*Checker).definedType(0xc0003a1600, {0x6fdb48, 0xc000459c60}, 0xc0005f31b8?)
        /usr/lib/go-1.22/src/go/types/typexpr.go:180 +0x37
go/types.(*Checker).varType(0xc0003a1600, {0x6fdb48, 0xc000459c60})
        /usr/lib/go-1.22/src/go/types/typexpr.go:145 +0x25
go/types.(*Checker).structType(0xc0003a1600, 0xc00087d740, 0xc00087d740?)
        /usr/lib/go-1.22/src/go/types/struct.go:113 +0x19f
go/types.(*Checker).typInternal(0xc0003a1600, {0x6fdcc8, 0xc000b0b398}, 0xc000d43630)
        /usr/lib/go-1.22/src/go/types/typexpr.go:316 +0x1345
go/types.(*Checker).definedType(0xc0003a1600, {0x6fdcc8, 0xc000b0b398}, 0x10?)
        /usr/lib/go-1.22/src/go/types/typexpr.go:180 +0x37
go/types.(*Checker).typeDecl(0xc0003a1600, 0xc000d43630, 0xc00037da00, 0x0)
        /usr/lib/go-1.22/src/go/types/decl.go:615 +0x44d
go/types.(*Checker).objDecl(0xc0003a1600, {0x700cb8, 0xc000d43630}, 0x0)
        /usr/lib/go-1.22/src/go/types/decl.go:197 +0xa7f
go/types.(*Checker).packageObjects(0xc0003a1600)
        /usr/lib/go-1.22/src/go/types/resolver.go:681 +0x425
go/types.(*Checker).checkFiles(0xc0003a1600, {0xc000797110, 0x1a, 0x1a})
        /usr/lib/go-1.22/src/go/types/check.go:408 +0x1a5
go/types.(*Checker).Files(...)
        /usr/lib/go-1.22/src/go/types/check.go:372
golang.org/x/tools/go/packages.(*loader).loadPackage(0xc000180000, 0xc00022b920)
        /home/cmesh/go/pkg/mod/golang.org/x/tools@v0.6.0/go/packages/packages.go:1052 +0xa72
golang.org/x/tools/go/packages.(*loader).loadRecursive.func1()
        /home/cmesh/go/pkg/mod/golang.org/x/tools@v0.6.0/go/packages/packages.go:851 +0x1a9
sync.(*Once).doSlow(0xc0002d2798?, 0x405f17?)
        /usr/lib/go-1.22/src/sync/once.go:74 +0xc2
sync.(*Once).Do(...)
        /usr/lib/go-1.22/src/sync/once.go:65
golang.org/x/tools/go/packages.(*loader).loadRecursive(0x606c5e?, 0xc0002d27d0?)
        /home/cmesh/go/pkg/mod/golang.org/x/tools@v0.6.0/go/packages/packages.go:839 +0x4a
golang.org/x/tools/go/packages.(*loader).refine.func2(0x0?)
        /home/cmesh/go/pkg/mod/golang.org/x/tools@v0.6.0/go/packages/packages.go:774 +0x26
created by golang.org/x/tools/go/packages.(*loader).refine in goroutine 1
        /home/cmesh/go/pkg/mod/golang.org/x/tools@v0.6.0/go/packages/packages.go:773 +0xccf
exit status 2
hclsyntax/generate.go:12: running "go": exit status 1

Which was fixed by downgrading to go 1.18