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builder: fix panic in findPackagePath when using -size short

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This fixes an "index out of range" panic that occurs when calculating
binary sizes. The strings.SplitN operation in findPackagePath can sometimes
return a slice with only one element, so we now verify the length of the
slice before attempting to access the second element.

Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2026-03-29 11:08:49 +02:00
parent 29cadaa23b
commit dc30aef687
1 changed files with 5 additions and 1 deletions
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builder/sizes.go
+5 -1
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@@ -954,7 +954,11 @@ func findPackagePath(path string, packagePathMap map[string]string) (packagePath
libPath := strings.TrimPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")+string(os.PathSeparator)) libPath := strings.TrimPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")+string(os.PathSeparator))
parts := strings.SplitN(libPath, string(os.PathSeparator), 2) parts := strings.SplitN(libPath, string(os.PathSeparator), 2)
packagePath = "C " + parts[0] packagePath = "C " + parts[0]
filename = parts[1] if len(parts) > 1 {
filename = parts[1]
} else {
filename = parts[0]
}
} else if prefix := filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project", "compiler-rt"); strings.HasPrefix(path, prefix) { } else if prefix := filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project", "compiler-rt"); strings.HasPrefix(path, prefix) {
packagePath = "C compiler-rt" packagePath = "C compiler-rt"
filename = strings.TrimPrefix(path, prefix+string(os.PathSeparator)) filename = strings.TrimPrefix(path, prefix+string(os.PathSeparator))