[Bug] The FTP Server crashed.

Reproduction And Environment

The reproduction steps and environment are very similar to https://github.com/TeamAmaze/AmazeFileManager/issues/4398#issue-3049099201.

Trace

FATAL EXCEPTION: pool-5-thread-5
Process: me.zhanghai.android.files, PID: 11085
java.nio.charset.CoderMalfunctionError: java.lang.IllegalArgumentException: newPosition > limit: (33 > 31)
    at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:624)
    at V6.a.x(SourceFile:29)
    at Q6.d.a(SourceFile:18)
    at e7.e.d(SourceFile:40)
    at X6.d.j(SourceFile:5)
    at X6.a.c(SourceFile:9)
    at X6.j.a(SourceFile:79)
    at i7.c.p(SourceFile:270)
    at k7.a.d(SourceFile:8)
    at X6.d.j(SourceFile:5)
    at X6.a.c(SourceFile:9)
    at X6.g.d(SourceFile:1)
    at X6.d.j(SourceFile:5)
    at X6.a.c(SourceFile:9)
    at X6.g.d(SourceFile:1)
    at X6.d.j(SourceFile:5)
    at b7.c.A(SourceFile:107)
    at N6.i.A(SourceFile:3)
    at G6.a.a(SourceFile:644)
    at Q6.b.e(SourceFile:175)
    at X6.c.f(SourceFile:105)
    at X6.d.c(SourceFile:5)
    at X6.a.e(SourceFile:9)
    at Q6.c.f(SourceFile:33)
    at X6.d.c(SourceFile:5)
    at X6.a.e(SourceFile:9)
    at X6.j.a(SourceFile:101)
    at i7.c.p(SourceFile:270)
    at k7.a.f(SourceFile:8)
    at X6.d.c(SourceFile:5)
    at X6.a.e(SourceFile:9)
    at e7.c.a(SourceFile:13)
    at e7.e.f(SourceFile:74)
    at X6.d.c(SourceFile:5)
    at X6.a.e(SourceFile:9)
    at X6.j.a(SourceFile:101)
    at b7.m.run(SourceFile:1)
    at g7.e.a(SourceFile:37)
    at g7.e.run(SourceFile:169)
    at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.IllegalArgumentException: newPosition > limit: (33 > 31)
    at java.nio.Buffer.createPositionException(Buffer.java:353)
    at java.nio.Buffer.position(Buffer.java:328)
    at java.nio.CharBuffer.position(CharBuffer.java:1651)
    at com.android.icu.charset.CharsetEncoderICU.setPosition(CharsetEncoderICU.java:251)
    at com.android.icu.charset.CharsetEncoderICU.encodeLoop(CharsetEncoderICU.java:189)
    at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:622)
    ... 39 more

Configuration

Start with the linked reproduction issue and the FTP server path implicated by the CharsetEncoder trace. Reproduce the crash using the reported configuration, then trace the FTP server's charset-encoding flow; done means the server no longer crashes for that case and a regression test covers it.