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VM has "ß".toUpperCase() be "ß" (German sharp s), not "SS". #18061

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lrhn opened this issue Apr 7, 2014 · 5 comments
Closed

VM has "ß".toUpperCase() be "ß" (German sharp s), not "SS". #18061

lrhn opened this issue Apr 7, 2014 · 5 comments
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area-vm Use area-vm for VM related issues, including code coverage, FFI, and the AOT and JIT backends. library-core P3 A lower priority bug or feature request type-bug Incorrect behavior (everything from a crash to more subtle misbehavior)

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@lrhn
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lrhn commented Apr 7, 2014

The Unicode upper-case variant of "ß" (U+00DF) is "SS", but the VM returns "ß" for "ß".toUpperCase().
@iposva-google
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Added this to the Later milestone.
Removed Priority-Unassigned label.
Added Priority-Low label.

@lrhn
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lrhn commented Apr 8, 2014

It seems the VM is using a simple Unicode case mapping (I believe it is the default for the ICU library), and JavaScript is using the full case mapping.
The simple case mapping can only create a string with the same length, but the full case mapping can generate a longer string.
Unicode talks about simple/full versions for case folding, but I haven't found where they say it about case mapping.

The String.toUpperCase() documentation only states that it uses the language independent unicode mapping, nothing about simple/full.

@kasperl
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kasperl commented Jul 10, 2014

Removed this from the Later milestone.
Added Oldschool-Milestone-Later label.

@kasperl
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kasperl commented Aug 4, 2014

Removed Oldschool-Milestone-Later label.

@lrhn lrhn added Type-Defect P3 A lower priority bug or feature request area-vm Use area-vm for VM related issues, including code coverage, FFI, and the AOT and JIT backends. library-core labels Aug 4, 2014
@kevmoo kevmoo added type-bug Incorrect behavior (everything from a crash to more subtle misbehavior) and removed triaged labels Mar 1, 2016
@srawlins
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Duplicate of #6706.

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area-vm Use area-vm for VM related issues, including code coverage, FFI, and the AOT and JIT backends. library-core P3 A lower priority bug or feature request type-bug Incorrect behavior (everything from a crash to more subtle misbehavior)
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