Verified Production Fix
[golang/go] gccgo: Segmentation Fault on inverted slice range
GH-golang/go#77940 • Mar 07, 2026
### ROOT CAUSE
The segmentation fault occurs because the generated assembly code does not handle empty slices correctly when the range is inverted. Specifically, the code attempts to access the slice's data without checking if the slice is empty, leading to an invalid memory access.
### CODE FIX
To fix this issue, we need to add a check to ensure the slice is non-empty before accessing its elements. Here's the modified Go code:
package main
func main() {
slice := []int{1, 2, 3, 4, 5}[4:0] // This creates an empty slice
if len(slice) == 0 {
print("Empty slice")
} else {
// Access slice elements safely
}
}
The fix involves checking the length of the slice before attempting to use it. This prevents the segmentation fault by avoiding operations on an empty slice.
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