core.exception.UnicodeException@src/rt/util/utf.d(290): invalid UTF-8 sequence
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./treemapgen(dchar rt.util.utf.decode(const(char[]), ref ulong)+0x1af) [0x46eb3b]
./treemapgen(_aApplycd1+0x47) [0x46aef7]
./treemapgen(immutable(char)[] ae.utils.json.jsonEscape!(true).jsonEscape(immutable(char)[])+0xa9) [0x466871]
./treemapgen(immutable(char)[] ae.utils.json.toJson!(immutable(char)[]).toJson(immutable(char)[])+0x1b) [0x466793]
./treemapgen(_D2ae5utils4json30__T6toJsonTHAyaSmain8TreeLeafZ6toJsonFHAyaSmain8TreeLeafZAya17__foreachbody1534MFKAyaKSmain8TreeLeafZi+0x6b) [0x466f73]
./treemapgen(_aaApply2+0x74) [0x46ae14]
./treemapgen(_D2ae5utils4json30__T6toJsonTHAyaSmain8TreeLeafZ6toJsonFHAyaSmain8TreeLeafZAya+0x37) [0x466e93]
./treemapgen(_D2ae5utils4json26__T6toJsonTSmain8TreeNodeZ6toJsonFSmain8TreeNodeZAya+0x11a) [0x454d26]
./treemapgen(_D2ae5utils4json30__T6toJsonTHAyaSmain8TreeNodeZ6toJsonFHAyaSmain8TreeNodeZAya17__foreachbody1531MFKAyaKSmain8TreeNodeZi+0x43) [0x466df7]
./treemapgen(_aaApply2+0x74) [0x46ae14]
./treemapgen(_D2ae5utils4json30__T6toJsonTHAyaSmain8TreeNodeZ6toJsonFHAyaSmain8TreeNodeZAya+0x37) [0x466d3f]
./treemapgen(_D2ae5utils4json26__T6toJsonTSmain8TreeNodeZ6toJsonFSmain8TreeNodeZAya+0xa5) [0x454cb1]
./treemapgen(_Dmain+0x6f6) [0x453df6]
./treemapgen(extern (C) int rt.dmain2.main(int, char**).void runMain()+0x17) [0x46be7f]
./treemapgen(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x2a) [0x46ba26]
./treemapgen(extern (C) int rt.dmain2.main(int, char**).void runAll()+0x42) [0x46bed2]
./treemapgen(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x2a) [0x46ba26]
./treemapgen(main+0xd3) [0x46b9b7]
/lib/libc.so.6(__libc_start_main+0xe6) [0x35700665ba6]
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