Minification error on del[]

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript, python
Domain
compilers

Research direction

Reproduce the issue with the shown del handlers[id(xmlHttp)] line, comparing normal compilation with the -n option. Inspect the generated JavaScript around the reported delete expression and trace the compiler/minification path that emits it. Done means the same source compiles successfully with minification and produces valid JavaScript.

Written by the indexing model from the issue text.

Description

IS: bug?

Hi again.

I encountered an error during minification when running Transcrypt without -n option. Following is the corresponding source line:

del handlers[id(xmlHttp)]

Following is the error message:

network.pyjamasHTTPRequest.pretty.js:299: ERROR - Parse error. Invalid delete operand. Only properties can be deleted.
                delete __k__ (handlers, id (xmlHttp));
^

This error is not raised when running Transcrypt with -n (nominification) option.

Thanks.

Dominant language
Python
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