The following program:

import java.util.*;

class InferenceTest {
    void test(Class<? extends Foo<?, ?>> cls) {
        Foo<?, ?> foo = make(cls);
    }

    // helper used to capture wildcards as type variables
    <A, B, C extends Foo<A, B>> Foo<A, B> make(Class<C> cls) { return null; }

    interface Foo<A, B> {}
}


Generates a very long error message (as inference engine goes in a loop):

javac Test.java
Test.java:325: error: method make in class InferenceTest cannot be applied to given types;
        Foo<?, ?> foo = make(cls);
                        ^
  required: Class<C>
  found: Class<CAP#1>
  reason: inferred type does not conform to equality constraint(s)
    inferred: CAP#2
    equality constraints(s): CAP#2,CAP#3,CAP#4,CAP#5,CAP#6,CAP#7,CAP#8,CAP#9,CAP#10,CAP#11,CAP#12,CAP#13,CAP#14,CAP#15,CAP#16,CAP#17,CAP#18,CAP#19,CAP#20,CAP#21,CAP#22,CAP#23,CAP#24,CAP#25,CAP#26,CAP#27,CAP#28,CAP#29,CAP#30,CAP#31,CAP#32,CAP#33,CAP#34,CAP#35,CAP#36,CAP#37,CAP#38,CAP#39,CAP#40,CAP#41,CAP#42,CAP#43,CAP#44,CAP#45,CAP#46,CAP#47,CAP#48,CAP#49,CAP#50,CAP#51,CAP#52,CAP#53,CAP#54,CAP#55,CAP#56,CAP#57,CAP#58,CAP#59,CAP#60,CAP#61,CAP#62,CAP#63,CAP#64,CAP#65,CAP#66,CAP#67,CAP#68,CAP#69,CAP#70,CAP#71,CAP#72,CAP#73,CAP#74,CAP#75,CAP#76,CAP#77,CAP#78,CAP#79,CAP#80,CAP#81,CAP#82,CAP#83,CAP#84,CAP#85,CAP#86,CAP#87,CAP#88,CAP#89,CAP#90,CAP#91,CAP#92,CAP#93,CAP#94,CAP#95,CAP#96,CAP#97,CAP#98,CAP#99,CAP#100,CAP#101,CAP#102,CAP#103,CAP#104,CAP#105,CAP#106,CAP#107,CAP#108,CAP#109,CAP#110,CAP#111,CAP#112,CAP#113,CAP#114,CAP#115,CAP#116,CAP#117,CAP#118,CAP#119,CAP#120,CAP#121,CAP#122,CAP#123,CAP#124,CAP#125,CAP#126,CAP#127,CAP#128,CAP#129,CAP#130,CAP#131,CAP#132,CAP#133,CAP#134,CAP#135,CAP#136,CAP#137,CAP#138,CAP#139,CAP#140,CAP#141,CAP#142,CAP#143,CAP#144,CAP#145,CAP#146,CAP#147,CAP#148,CAP#149,CAP#150,CAP#151,CAP#152,CAP#153,CAP#154,CAP#155,CAP#156,CAP#157,CAP#158,CAP#159,CAP#160,CAP#161,CAP#162,CAP#163,CAP#164,CAP#165,CAP#166,CAP#167,CAP#168,CAP#169,CAP#170,CAP#171,CAP#172,CAP#173,CAP#174,CAP#175,CAP#176,CAP#177,CAP#178,CAP#179,CAP#180,CAP#181,CAP#182,CAP#183,CAP#184,CAP#185,CAP#186,CAP#187,CAP#188,CAP#189,CAP#190,CAP#191,CAP#192,CAP#193,CAP#194,CAP#195,CAP#196,CAP#197,CAP#198,CAP#199,CAP#200,CAP#201
  where C,A,B are type-variables:
    C extends Foo<A,B> declared in method <A,B,C>make(Class<C>)
    A extends Object declared in method <A,B,C>make(Class<C>)
    B extends Object declared in method <A,B,C>make(Class<C>)
  where CAP#1,CAP#2,CAP#3,CAP#4,CAP#5,CAP#6,CAP#7,CAP#8,CAP#9,CAP#10,CAP#11,CAP#12,CAP#13,CAP#14,CAP#15,CAP#16,CAP#17,CAP#18,CAP#19,CAP#20,CAP#21,CAP#22,CAP#23,CAP#24,CAP#25,CAP#26,CAP#27,CAP#28,CAP#29,CAP#30,CAP#31,CAP#32,CAP#33,CAP#34,CAP#35,CAP#36,CAP#37,CAP#38,CAP#39,CAP#40,CAP#41,CAP#42,CAP#43,CAP#44,CAP#45,CAP#46,CAP#47,CAP#48,CAP#49,CAP#50,CAP#51,CAP#52,CAP#53,CAP#54,CAP#55,CAP#56,CAP#57,CAP#58,CAP#59,CAP#60,CAP#61,CAP#62,CAP#63,CAP#64,CAP#65,CAP#66,CAP#67,CAP#68,CAP#69,CAP#70,CAP#71,CAP#72,CAP#73,CAP#74,CAP#75,CAP#76,CAP#77,CAP#78,CAP#79,CAP#80,CAP#81,CAP#82,CAP#83,CAP#84,CAP#85,CAP#86,CAP#87,CAP#88,CAP#89,CAP#90,CAP#91,CAP#92,CAP#93,CAP#94,CAP#95,CAP#96,CAP#97,CAP#98,CAP#99,CAP#100,CAP#101,CAP#102,CAP#103,CAP#104,CAP#105,CAP#106,CAP#107,CAP#108,CAP#109,CAP#110,CAP#111,CAP#112,CAP#113,CAP#114,CAP#115,CAP#116,CAP#117,CAP#118,CAP#119,CAP#120,CAP#121,CAP#122,CAP#123,CAP#124,CAP#125,CAP#126,CAP#127,CAP#128,CAP#129,CAP#130,CAP#131,CAP#132,CAP#133,CAP#134,CAP#135,CAP#136,CAP#137,CAP#138,CAP#139,CAP#140,CAP#141,CAP#142,CAP#143,CAP#144,CAP#145,CAP#146,CAP#147,CAP#148,CAP#149,CAP#150,CAP#151,CAP#152,CAP#153,CAP#154,CAP#155,CAP#156,CAP#157,CAP#158,CAP#159,CAP#160,CAP#161,CAP#162,CAP#163,CAP#164,CAP#165,CAP#166,CAP#167,CAP#168,CAP#169,CAP#170,CAP#171,CAP#172,CAP#173,CAP#174,CAP#175,CAP#176,CAP#177,CAP#178,CAP#179,CAP#180,CAP#181,CAP#182,CAP#183,CAP#184,CAP#185,CAP#186,CAP#187,CAP#188,CAP#189,CAP#190,CAP#191,CAP#192,CAP#193,CAP#194,CAP#195,CAP#196,CAP#197,CAP#198,CAP#199,CAP#200,CAP#201 are fresh type-variables:
    CAP#1 extends Foo<?,?> from capture of ? extends Foo<?,?>
    CAP#2 extends Object from capture of ?
    CAP#3 extends Object from capture of ?
    CAP#4 extends Object from capture of ?
    CAP#5 extends Object from capture of ?
    CAP#6 extends Object from capture of ?
    CAP#7 extends Object from capture of ?
    CAP#8 extends Object from capture of ?
    CAP#9 extends Object from capture of ?
    CAP#10 extends Object from capture of ?
    CAP#11 extends Object from capture of ?
    CAP#12 extends Object from capture of ?
    CAP#13 extends Object from capture of ?
    CAP#14 extends Object from capture of ?
    CAP#15 extends Object from capture of ?
    CAP#16 extends Object from capture of ?
    CAP#17 extends Object from capture of ?
    CAP#18 extends Object from capture of ?
    CAP#19 extends Object from capture of ?
    CAP#20 extends Object from capture of ?
    CAP#21 extends Object from capture of ?
    CAP#22 extends Object from capture of ?
    CAP#23 extends Object from capture of ?
    CAP#24 extends Object from capture of ?
    CAP#25 extends Object from capture of ?
    CAP#26 extends Object from capture of ?
    CAP#27 extends Object from capture of ?
    CAP#28 extends Object from capture of ?
    CAP#29 extends Object from capture of ?
    CAP#30 extends Object from capture of ?
    CAP#31 extends Object from capture of ?
    CAP#32 extends Object from capture of ?
    CAP#33 extends Object from capture of ?
    CAP#34 extends Object from capture of ?
    CAP#35 extends Object from capture of ?
    CAP#36 extends Object from capture of ?
    CAP#37 extends Object from capture of ?
    CAP#38 extends Object from capture of ?
    CAP#39 extends Object from capture of ?
    CAP#40 extends Object from capture of ?
    CAP#41 extends Object from capture of ?
    CAP#42 extends Object from capture of ?
    CAP#43 extends Object from capture of ?
    CAP#44 extends Object from capture of ?
    CAP#45 extends Object from capture of ?
    CAP#46 extends Object from capture of ?
    CAP#47 extends Object from capture of ?
    CAP#48 extends Object from capture of ?
    CAP#49 extends Object from capture of ?
    CAP#50 extends Object from capture of ?
    CAP#51 extends Object from capture of ?
    CAP#52 extends Object from capture of ?
    CAP#53 extends Object from capture of ?
    CAP#54 extends Object from capture of ?
    CAP#55 extends Object from capture of ?
    CAP#56 extends Object from capture of ?
    CAP#57 extends Object from capture of ?
    CAP#58 extends Object from capture of ?
    CAP#59 extends Object from capture of ?
    CAP#60 extends Object from capture of ?
    CAP#61 extends Object from capture of ?
    CAP#62 extends Object from capture of ?
    CAP#63 extends Object from capture of ?
    CAP#64 extends Object from capture of ?
    CAP#65 extends Object from capture of ?
    CAP#66 extends Object from capture of ?
    CAP#67 extends Object from capture of ?
    CAP#68 extends Object from capture of ?
    CAP#69 extends Object from capture of ?
    CAP#70 extends Object from capture of ?
    CAP#71 extends Object from capture of ?
    CAP#72 extends Object from capture of ?
    CAP#73 extends Object from capture of ?
    CAP#74 extends Object from capture of ?
    CAP#75 extends Object from capture of ?
    CAP#76 extends Object from capture of ?
    CAP#77 extends Object from capture of ?
    CAP#78 extends Object from capture of ?
    CAP#79 extends Object from capture of ?
    CAP#80 extends Object from capture of ?
    CAP#81 extends Object from capture of ?
    CAP#82 extends Object from capture of ?
    CAP#83 extends Object from capture of ?
    CAP#84 extends Object from capture of ?
    CAP#85 extends Object from capture of ?
    CAP#86 extends Object from capture of ?
    CAP#87 extends Object from capture of ?
    CAP#88 extends Object from capture of ?
    CAP#89 extends Object from capture of ?
    CAP#90 extends Object from capture of ?
    CAP#91 extends Object from capture of ?
    CAP#92 extends Object from capture of ?
    CAP#93 extends Object from capture of ?
    CAP#94 extends Object from capture of ?
    CAP#95 extends Object from capture of ?
    CAP#96 extends Object from capture of ?
    CAP#97 extends Object from capture of ?
    CAP#98 extends Object from capture of ?
    CAP#99 extends Object from capture of ?
    CAP#100 extends Object from capture of ?
    CAP#101 extends Object from capture of ?
    CAP#102 extends Object from capture of ?
    CAP#103 extends Object from capture of ?
    CAP#104 extends Object from capture of ?
    CAP#105 extends Object from capture of ?
    CAP#106 extends Object from capture of ?
    CAP#107 extends Object from capture of ?
    CAP#108 extends Object from capture of ?
    CAP#109 extends Object from capture of ?
    CAP#110 extends Object from capture of ?
    CAP#111 extends Object from capture of ?
    CAP#112 extends Object from capture of ?
    CAP#113 extends Object from capture of ?
    CAP#114 extends Object from capture of ?
    CAP#115 extends Object from capture of ?
    CAP#116 extends Object from capture of ?
    CAP#117 extends Object from capture of ?
    CAP#118 extends Object from capture of ?
    CAP#119 extends Object from capture of ?
    CAP#120 extends Object from capture of ?
    CAP#121 extends Object from capture of ?
    CAP#122 extends Object from capture of ?
    CAP#123 extends Object from capture of ?
    CAP#124 extends Object from capture of ?
    CAP#125 extends Object from capture of ?
    CAP#126 extends Object from capture of ?
    CAP#127 extends Object from capture of ?
    CAP#128 extends Object from capture of ?
    CAP#129 extends Object from capture of ?
    CAP#130 extends Object from capture of ?
    CAP#131 extends Object from capture of ?
    CAP#132 extends Object from capture of ?
    CAP#133 extends Object from capture of ?
    CAP#134 extends Object from capture of ?
    CAP#135 extends Object from capture of ?
    CAP#136 extends Object from capture of ?
    CAP#137 extends Object from capture of ?
    CAP#138 extends Object from capture of ?
    CAP#139 extends Object from capture of ?
    CAP#140 extends Object from capture of ?
    CAP#141 extends Object from capture of ?
    CAP#142 extends Object from capture of ?
    CAP#143 extends Object from capture of ?
    CAP#144 extends Object from capture of ?
    CAP#145 extends Object from capture of ?
    CAP#146 extends Object from capture of ?
    CAP#147 extends Object from capture of ?
    CAP#148 extends Object from capture of ?
    CAP#149 extends Object from capture of ?
    CAP#150 extends Object from capture of ?
    CAP#151 extends Object from capture of ?
    CAP#152 extends Object from capture of ?
    CAP#153 extends Object from capture of ?
    CAP#154 extends Object from capture of ?
    CAP#155 extends Object from capture of ?
    CAP#156 extends Object from capture of ?
    CAP#157 extends Object from capture of ?
    CAP#158 extends Object from capture of ?
    CAP#159 extends Object from capture of ?
    CAP#160 extends Object from capture of ?
    CAP#161 extends Object from capture of ?
    CAP#162 extends Object from capture of ?
    CAP#163 extends Object from capture of ?
    CAP#164 extends Object from capture of ?
    CAP#165 extends Object from capture of ?
    CAP#166 extends Object from capture of ?
    CAP#167 extends Object from capture of ?
    CAP#168 extends Object from capture of ?
    CAP#169 extends Object from capture of ?
    CAP#170 extends Object from capture of ?
    CAP#171 extends Object from capture of ?
    CAP#172 extends Object from capture of ?
    CAP#173 extends Object from capture of ?
    CAP#174 extends Object from capture of ?
    CAP#175 extends Object from capture of ?
    CAP#176 extends Object from capture of ?
    CAP#177 extends Object from capture of ?
    CAP#178 extends Object from capture of ?
    CAP#179 extends Object from capture of ?
    CAP#180 extends Object from capture of ?
    CAP#181 extends Object from capture of ?
    CAP#182 extends Object from capture of ?
    CAP#183 extends Object from capture of ?
    CAP#184 extends Object from capture of ?
    CAP#185 extends Object from capture of ?
    CAP#186 extends Object from capture of ?
    CAP#187 extends Object from capture of ?
    CAP#188 extends Object from capture of ?
    CAP#189 extends Object from capture of ?
    CAP#190 extends Object from capture of ?
    CAP#191 extends Object from capture of ?
    CAP#192 extends Object from capture of ?
    CAP#193 extends Object from capture of ?
    CAP#194 extends Object from capture of ?
    CAP#195 extends Object from capture of ?
    CAP#196 extends Object from capture of ?
    CAP#197 extends Object from capture of ?
    CAP#198 extends Object from capture of ?
    CAP#199 extends Object from capture of ?
    CAP#200 extends Object from capture of ?
    CAP#201 extends Object from capture of ?
1 error