#2625 Native function parameter names missing in ActionScript output

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List of issues

Author:

crobes

Date created: 02/07/2026, 3:44:47 pm

Type: question

Visibility: Everybody

Assigned to:

Labels: AS3 Decompilation

State: opened Help

> What steps will reproduce the problem? Compile the attached swf file using flex sdk (pre-compiled version also attached): compc -output native.swc -include-sources NativeNamedArguments.as Then open native.swc in the decompiler, and check ActionScript and pcode output for NativeNamedArguments. > What is the expected output? What do you see instead? I'd expect to see the parameter names preserved in both ActionScript and pcode. However, I can only see it as "paramname" in the pcode output window, not in the ActionScript window. Also, if I export to pcode, the parameter names are also lost. They are only in the pcode preview window. > What version of the product are you using? Is it "nightly build"? Which operating system do you have? v24.1.2, AUR build on Manjaro Linux > Please provide any additional information below. If the problem is related to a SWF file, attach it here, otherwise we can't help you. native.swc is provided, but can also be compiled from the provided .as source file.

NativeNamedArguments.as (130 B)

NativeNamedArguments_exported.as (242 B)

pcode_window_testNative.txt (492 B)

NativeNamedArguments.pcode (2 KiB)

native.swc (2 KiB)

JPEXS

02/09/2026, 2:51:23 pm

We do not show parameter names by default because in some SWF producers like Flash CS5.5, there were incorrect indices put there. However, you can get the parameter names back in if you enable "Enable parameter names in AS3" option in Advanced settings / Scripts.

State: new→opened
Type: bug→question