JS: store global object in a variable to avoid name clashes between generated declarations (in minified mode) and global declarations

core/src/main/java/org/teavm/backend/javascript/JavaScriptTarget.java

@@ -464,11 +464,11 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
         for (String key : controller.getEntryPoints().keySet()) {
             writer.append("var ").append(key).append(";").softNewLine();
         }
-        writer.append("(function()").ws().append("{").newLine();
+        writer.append("(function($rt_globals)").ws().append("{").newLine();
     }
 
     private void printWrapperEnd(SourceWriter writer) throws IOException {
-        writer.append("})();").newLine();
+        writer.append("})(this);").newLine();
     }
 
     private void printStats(Renderer renderer, int totalSize) {

core/src/main/java/org/teavm/backend/javascript/rendering/AstWriter.java

@@ -16,12 +16,12 @@
 package org.teavm.backend.javascript.rendering;
 
 import java.io.IOException;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.function.Function;
 import org.mozilla.javascript.Node;
 import org.mozilla.javascript.ScriptRuntime;
 import org.mozilla.javascript.Token;
@@ -92,13 +92,16 @@ public class AstWriter {
     public static final int PRECEDENCE_COMMA = 18;
     private SourceWriter writer;
     private Map<String, NameEmitter> nameMap = new HashMap<>();
+    private boolean rootScope = true;
     private Set<String> aliases = new HashSet<>();
+    private Function<String, NameEmitter> globalNameWriter;
 
-    public AstWriter(SourceWriter writer) {
+    public AstWriter(SourceWriter writer, Function<String, NameEmitter> globalNameWriter) {
         this.writer = writer;
+        this.globalNameWriter = globalNameWriter;
     }
 
-    private void declareName(String name) {
+    public void declareName(String name) {
         if (nameMap.containsKey(name)) {
             return;
         }
@@ -124,14 +127,25 @@ public class AstWriter {
     }
 
     public void hoist(AstNode node) {
+        declareName("arguments");
         node.visit(n -> {
             if (n instanceof Scope) {
-                Scope scope = (Scope) n;
+                var scope = (Scope) n;
                 if (scope.getSymbolTable() != null) {
-                    for (String name : scope.getSymbolTable().keySet()) {
+                    for (var name : scope.getSymbolTable().keySet()) {
                         declareName(name);
                     }
                 }
+            } else if (n instanceof CatchClause) {
+                var clause = (CatchClause) n;
+                var name = clause.getVarName().getIdentifier();
+                declareName(name);
+            } else if (n instanceof VariableInitializer) {
+                var initializer = (VariableInitializer) n;
+                if (initializer.getTarget() instanceof Name) {
+                    var id = ((Name) initializer.getTarget()).getIdentifier();
+                    declareName(id);
+                }
             }
             return true;
         });
@@ -488,10 +502,10 @@ public class AstWriter {
     private void print(PropertyGet node) throws IOException {
         print(node.getLeft(), PRECEDENCE_MEMBER);
         writer.append('.');
-        Map<String, NameEmitter> oldNameMap = nameMap;
+        var oldRootScope = rootScope;
-        nameMap = Collections.emptyMap();
+        rootScope = false;
         print(node.getRight());
-        nameMap = oldNameMap;
+        rootScope = oldRootScope;
     }
 
     private void print(FunctionCall node, int precedence) throws IOException {
@@ -627,11 +641,19 @@ public class AstWriter {
     }
 
     private void print(Name node, int precedence) throws IOException {
-        NameEmitter alias = nameMap.get(node.getIdentifier());
+        if (rootScope) {
+            var alias = nameMap.get(node.getIdentifier());
             if (alias == null) {
+                if (globalNameWriter != null) {
+                    alias = globalNameWriter.apply(node.getIdentifier());
+                } else {
                     alias = prec -> writer.append(node.getIdentifier());
                 }
+            }
             alias.emit(precedence);
+        } else {
+            writer.append(node.getIdentifier());
+        }
     }
 
     private void print(RegExpLiteral node) throws IOException {
@@ -662,10 +684,10 @@ public class AstWriter {
         } else if (node.isSetterMethod()) {
             writer.append("set ");
         }
-        Map<String, NameEmitter> oldNameMap = nameMap;
+        var oldRootScope = rootScope;
-        nameMap = Collections.emptyMap();
+        rootScope = false;
         print(node.getLeft());
-        nameMap = oldNameMap;
+        rootScope = oldRootScope;
         if (!node.isMethod()) {
             writer.ws().append(':').ws();
         }

core/src/main/java/org/teavm/backend/javascript/rendering/DefaultGlobalNameWriter.java

@@ -0,0 +1,35 @@
+/*
+ *  Copyright 2022 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.backend.javascript.rendering;
+
+import java.util.function.Function;
+import org.teavm.backend.javascript.codegen.SourceWriter;
+
+public class DefaultGlobalNameWriter implements Function<String, NameEmitter> {
+    private SourceWriter writer;
+
+    public DefaultGlobalNameWriter(SourceWriter writer) {
+        this.writer = writer;
+    }
+
+    @Override
+    public NameEmitter apply(String s) {
+        if (s.startsWith("$rt_") || s.startsWith("Long_") || s.equals("Long")) {
+            return prec -> writer.append(s);
+        }
+        return prec -> writer.append("$rt_globals").append('.').append(s);
+    }
+}

core/src/main/java/org/teavm/backend/javascript/rendering/RuntimeRenderer.java

@@ -87,7 +87,7 @@ public class RuntimeRenderer {
         AstRoot ast = parseRuntime(name);
         ast.visit(new StringConstantElimination());
         new RuntimeAstTransformer(writer.getNaming()).accept(ast);
-        AstWriter astWriter = new AstWriter(writer);
+        var astWriter = new AstWriter(writer, new DefaultGlobalNameWriter(writer));
         astWriter.hoist(ast);
         astWriter.print(ast);
     }

core/src/test/java/org/teavm/backend/javascript/rendering/AstWriterTest.java

@@ -15,14 +15,12 @@
  */
 package org.teavm.backend.javascript.rendering;
 
-import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
 import java.io.IOException;
 import java.io.StringReader;
 import org.junit.Test;
 import org.mozilla.javascript.CompilerEnvirons;
 import org.mozilla.javascript.Context;
-import org.mozilla.javascript.ast.AstRoot;
 import org.teavm.backend.javascript.codegen.SourceWriter;
 import org.teavm.backend.javascript.codegen.SourceWriterBuilder;
 
@@ -30,227 +28,269 @@ public class AstWriterTest {
     private StringBuilder sb = new StringBuilder();
     private SourceWriter sourceWriter;
     private AstWriter writer;
+    private AstWriter writerWithGlobals;
 
     public AstWriterTest() {
-        SourceWriterBuilder builder = new SourceWriterBuilder(null);
+        var builder = new SourceWriterBuilder(null);
         builder.setMinified(true);
         sourceWriter = builder.build(sb);
-        writer = new AstWriter(sourceWriter);
+        writer = new AstWriter(sourceWriter, null);
+        writerWithGlobals = new AstWriter(sourceWriter, name -> prec -> sourceWriter.append("globals.").append(name));
     }
 
     @Test
     public void writesReturn() throws IOException {
-        assertThat(transform("return x;"), is("return x;"));
+        assertEquals("return x;", transform("return x;"));
     }
 
     @Test
     public void writesEmptyReturn() throws IOException {
-        assertThat(transform("return;"), is("return;"));
+        assertEquals("return;", transform("return;"));
     }
 
     @Test
     public void writesThrow() throws IOException {
-        assertThat(transform("throw x;"), is("throw x;"));
+        assertEquals("throw x;", transform("throw x;"));
     }
 
     @Test
     public void writesBreak() throws IOException {
-        assertThat(transform("a: while (true) { break a; }"), is("a:while(true){break a;}"));
+        assertEquals("a:while(true){break a;}", transform("a: while (true) { break a; }"));
     }
 
     @Test
     public void writesEmptyBreak() throws IOException {
-        assertThat(transform("while(true) { break; }"), is("while(true){break;}"));
+        assertEquals("while(true){break;}", transform("while(true) { break; }"));
     }
 
     @Test
     public void writesContinue() throws IOException {
-        assertThat(transform("a: while (true) { continue a; }"), is("a:while(true){continue a;}"));
+        assertEquals("a:while(true){continue a;}", transform("a: while (true) { continue a; }"));
     }
 
     @Test
     public void writesEmptyContinue() throws IOException {
-        assertThat(transform("while(true) { continue; }"), is("while(true){continue;}"));
+        assertEquals("while(true){continue;}", transform("while(true) { continue; }"));
     }
 
     @Test
     public void writesBlock() throws IOException {
-        assertThat(transform("{ foo(); bar(); }"), is("{foo();bar();}"));
+        assertEquals("{foo();bar();}", transform("{ foo(); bar(); }"));
     }
 
     @Test
     public void writesTryCatch() throws IOException {
-        assertThat(transform("try { foo(); } catch (e) { alert(e); }"), is("try {foo();}catch(e){alert(e);}"));
+        assertEquals("try {foo();}catch(e){alert(e);}", transform("try { foo(); } catch (e) { alert(e); }"));
-        assertThat(transform("try { foo(); } finally { close(); }"), is("try {foo();}finally {close();}"));
+        assertEquals("try {foo();}finally {close();}", transform("try { foo(); } finally { close(); }"));
     }
 
     @Test
     public void writesFor() throws IOException {
-        assertThat(transform("for (var i = 0; i < array.length; ++i,++j) foo(array[i]);"),
+        assertEquals(
-                is("for(var i=0;i<array.length;++i,++j)foo(array[i]);"));
+                "for(var i=0;i<array.length;++i,++j)foo(array[i]);",
+                transform("for (var i = 0; i < array.length; ++i,++j) foo(array[i]);")
+        );
     }
 
     @Test
     public void writesEmptyFor() throws IOException {
-        assertThat(transform("for (;;) foo();"), is("for(;;)foo();"));
+        assertEquals("for(;;)foo();", transform("for (;;) foo();"));
     }
 
     @Test
     public void writesForIn() throws IOException {
-        assertThat(transform("for (var property in window) alert(property);"),
+        assertEquals(
-                is("for(var property in window)alert(property);"));
+                "for(var property in window)alert(property);",
+                transform("for (var property in window) alert(property);")
+        );
     }
 
     @Test
     public void writesWhile() throws IOException {
-        assertThat(transform("while (shouldProceed()) proceed();"), is("while(shouldProceed())proceed();"));
+        assertEquals("while(shouldProceed())proceed();", transform("while (shouldProceed()) proceed();"));
     }
 
     @Test
     public void writesDoWhile() throws IOException {
-        assertThat(transform("do proceed(); while(shouldRepeat());"), is("do proceed();while(shouldRepeat());"));
+        assertEquals("do proceed();while(shouldRepeat());", transform("do proceed(); while(shouldRepeat());"));
     }
 
     @Test
     public void writesIfElse() throws IOException {
-        assertThat(transform("if (test()) performTrue(); else performFalse();"),
+        assertEquals(
-                is("if(test())performTrue();else performFalse();"));
+                "if(test())performTrue();else performFalse();",
+                transform("if (test()) performTrue(); else performFalse();")
+        );
     }
 
     @Test
     public void writesIf() throws IOException {
-        assertThat(transform("if (shouldPerform()) perform();"), is("if(shouldPerform())perform();"));
+        assertEquals("if(shouldPerform())perform();", transform("if (shouldPerform()) perform();"));
     }
 
     @Test
     public void writesSwitch() throws IOException {
-        assertThat(transform("switch (c) { "
+        assertEquals(
+                "switch(c){case '.':case '?':matchAny();break;case '*':matchSequence();break;"
+                        + "default:matchChar(c);break;}",
+                transform("switch (c) { "
                 + "case '.': case '?': matchAny(); break; "
                 + "case '*': matchSequence(); break;"
-                + "default: matchChar(c); break; } "),
+                + "default: matchChar(c); break; } ")
-                is("switch(c){case '.':case '?':matchAny();break;case '*':matchSequence();break;"
+        );
-                        + "default:matchChar(c);break;}"));
     }
 
     @Test
     public void writesLet() throws IOException {
-        assertThat(transform("let x = 1; alert(x);"), is("let x=1;alert(x);"));
+        assertEquals("let x=1;alert(x);", transform("let x = 1; alert(x);"));
-        assertThat(transform("let x = 1, y; alert(x,y);"), is("let x=1,y;alert(x,y);"));
+        assertEquals("let x=1,y;alert(x,y);", transform("let x = 1, y; alert(x,y);"));
     }
 
     @Test
     public void writesConst() throws IOException {
-        assertThat(transform("const x = 1,y = 2; alert(x,y);"), is("const x=1,y=2;alert(x,y);"));
+        assertEquals("const xx=1,yy=2;alert(xx,yy);", transform("const xx = 1,yy = 2; alert(xx,yy);"));
     }
 
     @Test
     public void writesElementGet() throws IOException {
-        assertThat(transform("return array[i];"), is("return array[i];"));
+        assertEquals("return array[i];", transform("return array[i];"));
-        assertThat(transform("return array[i][j];"), is("return array[i][j];"));
+        assertEquals("return array[i][j];", transform("return array[i][j];"));
-        assertThat(transform("return (array[i])[j];"), is("return array[i][j];"));
+        assertEquals("return array[i][j];", transform("return (array[i])[j];"));
-        assertThat(transform("return (a + b)[i];"), is("return (a+b)[i];"));
+        assertEquals("return (a+b)[i];", transform("return (a + b)[i];"));
-        assertThat(transform("return a + b[i];"), is("return a+b[i];"));
+        assertEquals("return a+b[i];", transform("return a + b[i];"));
     }
 
     @Test
     public void writesPropertyGet() throws IOException {
-        assertThat(transform("return array.length;"), is("return array.length;"));
+        assertEquals("return array.length;", transform("return array.length;"));
-        assertThat(transform("return (array).length;"), is("return array.length;"));
+        assertEquals("return array.length;", transform("return (array).length;"));
-        assertThat(transform("return (x + y).toString();"), is("return (x+y).toString();"));
+        assertEquals("return (x+y).toString();", transform("return (x + y).toString();"));
     }
 
     @Test
     public void writesFunctionCall() throws IOException {
-        assertThat(transform("return f(x);"), is("return f(x);"));
+        assertEquals("return f(x);", transform("return f(x);"));
-        assertThat(transform("return (f)(x);"), is("return f(x);"));
+        assertEquals("return f(x);", transform("return (f)(x);"));
-        assertThat(transform("return (f + g)(x);"), is("return (f+g)(x);"));
+        assertEquals("return (f+g)(x);", transform("return (f + g)(x);"));
     }
 
     @Test
     public void writesConstructorCall() throws IOException {
-        assertThat(transform("return new (f + g)(x);"), is("return new (f+g)(x);"));
+        assertEquals("return new (f+g)(x);", transform("return new (f + g)(x);"));
-        assertThat(transform("return new f + g(x);"), is("return new f()+g(x);"));
+        assertEquals("return new f()+g(x);", transform("return new f + g(x);"));
-        assertThat(transform("return new f()(x);"), is("return new f()(x);"));
+        assertEquals("return new f()(x);", transform("return new f()(x);"));
-        assertThat(transform("return (new f())(x);"), is("return new f()(x);"));
+        assertEquals("return new f()(x);", transform("return (new f())(x);"));
-        assertThat(transform("return new (f())(x);"), is("return new (f())(x);"));
+        assertEquals("return new (f())(x);", transform("return new (f())(x);"));
-        assertThat(transform("return new f[0](x);"), is("return new f[0](x);"));
+        assertEquals("return new f[0](x);", transform("return new f[0](x);"));
-        assertThat(transform("return (new f[0](x));"), is("return new f[0](x);"));
+        assertEquals("return new f[0](x);", transform("return (new f[0](x));"));
     }
 
     @Test
     public void writesConditionalExpr() throws IOException {
-        assertThat(transform("return cond ? 1 : 0;"), is("return cond?1:0;"));
+        assertEquals("return cond?1:0;", transform("return cond ? 1 : 0;"));
-        assertThat(transform("return a < b ? -1 : a > b ? 1 : 0;"), is("return a<b? -1:a>b?1:0;"));
+        assertEquals("return a<b? -1:a>b?1:0;", transform("return a < b ? -1 : a > b ? 1 : 0;"));
-        assertThat(transform("return a < b ? -1 : (a > b ? 1 : 0);"), is("return a<b? -1:a>b?1:0;"));
+        assertEquals("return a<b? -1:a>b?1:0;", transform("return a < b ? -1 : (a > b ? 1 : 0);"));
-        assertThat(transform("return (a < b ? x == y : x != y) ? 1 : 0;"), is("return (a<b?x==y:x!=y)?1:0;"));
+        assertEquals("return (a<b?x==y:x!=y)?1:0;", transform("return (a < b ? x == y : x != y) ? 1 : 0;"));
-        assertThat(transform("return a < b ? (x > y ? x : y) : z"), is("return a<b?(x>y?x:y):z;"));
+        assertEquals("return a<b?(x>y?x:y):z;", transform("return a < b ? (x > y ? x : y) : z"));
     }
 
     @Test
     public void writesRegExp() throws IOException {
-        assertThat(transform("return /[a-z]+/.match(text);"), is("return /[a-z]+/.match(text);"));
+        assertEquals("return /[a-z]+/.match(text);", transform("return /[a-z]+/.match(text);"));
-        assertThat(transform("return /[a-z]+/ig.match(text);"), is("return /[a-z]+/ig.match(text);"));
+        assertEquals("return /[a-z]+/ig.match(text);", transform("return /[a-z]+/ig.match(text);"));
     }
 
     @Test
     public void writesArrayLiteral() throws IOException {
-        assertThat(transform("return [];"), is("return [];"));
+        assertEquals("return [];", transform("return [];"));
-        assertThat(transform("return [a, b + c];"), is("return [a,b+c];"));
+        assertEquals("return [a,b+c];", transform("return [a, b + c];"));
     }
 
     @Test
     public void writesObjectLiteral() throws IOException {
-        assertThat(transform("return {};"), is("return {};"));
+        assertEquals("return {};", transform("return {};"));
-        assertThat(transform("return { foo : bar };"), is("return {foo:bar};"));
+        assertEquals("return {foo:bar};", transform("return { foo : bar };"));
-        assertThat(transform("return { foo : bar };"), is("return {foo:bar};"));
+        assertEquals("return {foo:bar};", transform("return { foo : bar };"));
-        assertThat(transform("return { _foo : bar, get foo() { return this._foo; } };"),
+        assertEquals(
-                is("return {_foo:bar,get foo(){return this._foo;}};"));
+                "return {_foo:bar,get foo(){return this._foo;}};",
+                transform("return { _foo : bar, get foo() { return this._foo; } };")
+        );
     }
 
     @Test
     public void writesFunction() throws IOException {
-        assertThat(transform("return function f(x, y) { return x + y; };"),
+        assertEquals(
-                is("return function f(x,y){return x+y;};"));
+                "return function f(x,y){return x+y;};",
+                transform("return function f(x, y) { return x + y; };")
+        );
     }
 
     @Test
     public void writesUnary() throws IOException {
-        assertThat(transform("return -a;"), is("return  -a;"));
+        assertEquals("return  -a;", transform("return -a;"));
-        assertThat(transform("return -(a + b);"), is("return  -(a+b);"));
+        assertEquals("return  -(a+b);", transform("return -(a + b);"));
-        assertThat(transform("return -a + b;"), is("return  -a+b;"));
+        assertEquals("return  -a+b;", transform("return -a + b;"));
-        assertThat(transform("return (-a) + b;"), is("return  -a+b;"));
+        assertEquals("return  -a+b;", transform("return (-a) + b;"));
-        assertThat(transform("return (-f)(x);"), is("return ( -f)(x);"));
+        assertEquals("return ( -f)(x);", transform("return (-f)(x);"));
-        assertThat(transform("return typeof a;"), is("return typeof a;"));
+        assertEquals("return typeof a;", transform("return typeof a;"));
     }
 
     @Test
     public void writesPostfix() throws IOException {
-        assertThat(transform("return a++;"), is("return a++;"));
+        assertEquals("return a++;", transform("return a++;"));
     }
 
     @Test
     public void respectsPrecedence() throws IOException {
-        assertThat(transform("return a + b + c;"), is("return a+b+c;"));
+        assertEquals("return a+b+c;", transform("return a + b + c;"));
-        assertThat(transform("return (a + b) + c;"), is("return a+b+c;"));
+        assertEquals("return a+b+c;", transform("return (a + b) + c;"));
-        assertThat(transform("return a + (b + c);"), is("return a+b+c;"));
+        assertEquals("return a+b+c;", transform("return a + (b + c);"));
-        assertThat(transform("return a - b + c;"), is("return a -b+c;"));
+        assertEquals("return a -b+c;", transform("return a - b + c;"));
-        assertThat(transform("return (a - b) + c;"), is("return a -b+c;"));
+        assertEquals("return a -b+c;", transform("return (a - b) + c;"));
-        assertThat(transform("return a - (b + c);"), is("return a -(b+c);"));
+        assertEquals("return a -(b+c);", transform("return a - (b + c);"));
     }
 
     @Test
     public void writesDelete() throws IOException {
-        assertThat(transform("delete a.b;"), is("delete a.b;"));
+        assertEquals("delete a.b;", transform("delete a.b;"));
+    }
+
+    @Test
+    public void writesGlobalRef() throws IOException {
+        assertEquals(
+                "function(x){return x+globals.y;}",
+                transformGlobals("function(x) { return x + y; }")
+        );
+        assertEquals(
+                "try {globals.foo();}catch(x){globals.foo(x);}",
+                transformGlobals("try { foo(); } catch (x) { foo(x); }")
+        );
+        assertEquals(
+                "for(var i=0;i<10;++i){globals.foo(i,globals.j);}",
+                transformGlobals("for (var i = 0; i < 10; ++i) { foo(i, j); }")
+        );
+        assertEquals(
+                "function(){var x=0;globals.foo(x,globals.y);}",
+                transformGlobals("function() { var x = 0; foo(x, y); }")
+        );
     }
 
     private String transform(String text) throws IOException {
+        return transform(text, writer);
+    }
+
+    private String transformGlobals(String text) throws IOException {
+        return transform(text, writerWithGlobals);
+    }
+
+    private String transform(String text, AstWriter writer) throws IOException {
         sb.setLength(0);
-        CompilerEnvirons env = new CompilerEnvirons();
+        var env = new CompilerEnvirons();
         env.setRecoverFromErrors(true);
         env.setLanguageVersion(Context.VERSION_1_8);
-        JSParser factory = new JSParser(env);
+        var factory = new JSParser(env);
         factory.enterFunction();
-        AstRoot rootNode = factory.parse(new StringReader(text), null, 0);
+        var rootNode = factory.parse(new StringReader(text), null, 0);
         factory.exitFunction();
         writer.hoist(rootNode);
         writer.print(rootNode);

jso/impl/src/main/java/org/teavm/jso/impl/JSBodyAstEmitter.java

@@ -21,6 +21,7 @@ import org.mozilla.javascript.ast.AstNode;
 import org.mozilla.javascript.ast.Block;
 import org.teavm.backend.javascript.codegen.SourceWriter;
 import org.teavm.backend.javascript.rendering.AstWriter;
+import org.teavm.backend.javascript.rendering.DefaultGlobalNameWriter;
 import org.teavm.backend.javascript.rendering.Precedence;
 import org.teavm.backend.javascript.spi.GeneratorContext;
 import org.teavm.backend.javascript.spi.InjectorContext;
@@ -29,17 +30,19 @@ import org.teavm.model.MethodReference;
 class JSBodyAstEmitter implements JSBodyEmitter {
     private boolean isStatic;
     private AstNode ast;
+    private AstNode rootAst;
     private String[] parameterNames;
 
-    JSBodyAstEmitter(boolean isStatic, AstNode ast, String[] parameterNames) {
+    JSBodyAstEmitter(boolean isStatic, AstNode ast, AstNode rootAst, String[] parameterNames) {
         this.isStatic = isStatic;
         this.ast = ast;
+        this.rootAst = rootAst;
         this.parameterNames = parameterNames;
     }
 
     @Override
     public void emit(InjectorContext context) throws IOException {
-        AstWriter astWriter = new AstWriter(context.getWriter());
+        var astWriter = new AstWriter(context.getWriter(), new DefaultGlobalNameWriter(context.getWriter()));
         int paramIndex = 0;
         if (!isStatic) {
             int index = paramIndex++;
@@ -51,7 +54,7 @@ class JSBodyAstEmitter implements JSBodyEmitter {
             astWriter.declareNameEmitter(parameterNames[i],
                     prec -> context.writeExpr(context.getArgument(index), convert(prec)));
         }
-        astWriter.hoist(ast);
+        astWriter.hoist(rootAst);
         astWriter.print(ast, convert(context.getPrecedence()));
     }
 
@@ -139,7 +142,7 @@ class JSBodyAstEmitter implements JSBodyEmitter {
 
     @Override
     public void emit(GeneratorContext context, SourceWriter writer, MethodReference methodRef) throws IOException {
-        AstWriter astWriter = new AstWriter(writer);
+        var astWriter = new AstWriter(writer, new DefaultGlobalNameWriter(writer));
         int paramIndex = 1;
         if (!isStatic) {
             int index = paramIndex++;
@@ -149,7 +152,7 @@ class JSBodyAstEmitter implements JSBodyEmitter {
             int index = paramIndex++;
             astWriter.declareNameEmitter(parameterNames[i], prec -> writer.append(context.getParameterName(index)));
         }
-        astWriter.hoist(ast);
+        astWriter.hoist(rootAst);
         if (ast instanceof Block) {
             for (Node child = ast.getFirstChild(); child != null; child = child.getNext()) {
                 astWriter.print((AstNode) child);

jso/impl/src/main/java/org/teavm/jso/impl/JSClassProcessor.java

@@ -26,7 +26,6 @@ import java.util.Objects;
 import java.util.Set;
 import org.mozilla.javascript.CompilerEnvirons;
 import org.mozilla.javascript.Context;
-import org.mozilla.javascript.ast.AstNode;
 import org.mozilla.javascript.ast.AstRoot;
 import org.mozilla.javascript.ast.FunctionNode;
 import org.teavm.backend.javascript.rendering.JSParser;
@@ -556,27 +555,26 @@ class JSClassProcessor {
                 .toArray(String[]::new) : new String[0];
 
         // Parse JS script
-        TeaVMErrorReporter errorReporter = new TeaVMErrorReporter(diagnostics,
+        var errorReporter = new TeaVMErrorReporter(diagnostics, new CallLocation(methodToProcess.getReference()));
-                new CallLocation(methodToProcess.getReference()));
+        var env = new CompilerEnvirons();
-        CompilerEnvirons env = new CompilerEnvirons();
         env.setRecoverFromErrors(true);
         env.setLanguageVersion(Context.VERSION_1_8);
         env.setIdeMode(true);
-        JSParser parser = new JSParser(env, errorReporter);
+        var parser = new JSParser(env, errorReporter);
         AstRoot rootNode;
         try {
             rootNode = (AstRoot) parser.parseAsObject(new StringReader("function(){" + script + "}"), null, 0);
         } catch (IOException e) {
             throw new RuntimeException("IO Error occurred", e);
         }
-        AstNode body = ((FunctionNode) rootNode.getFirstChild()).getBody();
+        var body = ((FunctionNode) rootNode.getFirstChild()).getBody();
 
         repository.methodMap.put(methodToProcess.getReference(), proxyMethod);
         if (errorReporter.hasErrors()) {
             repository.emitters.put(proxyMethod, new JSBodyBloatedEmitter(isStatic, proxyMethod,
                     script, parameterNames));
         } else {
-            AstNode expr = JSBodyInlineUtil.isSuitableForInlining(methodToProcess.getReference(),
+            var expr = JSBodyInlineUtil.isSuitableForInlining(methodToProcess.getReference(),
                     parameterNames, body);
             if (expr != null) {
                 repository.inlineMethods.add(methodToProcess.getReference());
@@ -584,7 +582,7 @@ class JSClassProcessor {
                 expr = body;
             }
             javaInvocationProcessor.process(location, expr);
-            repository.emitters.put(proxyMethod, new JSBodyAstEmitter(isStatic, expr, parameterNames));
+            repository.emitters.put(proxyMethod, new JSBodyAstEmitter(isStatic, expr, rootNode, parameterNames));
         }
     }
 

tests/src/test/java/org/teavm/incremental/IncrementalTest.java

@@ -164,6 +164,7 @@ public class IncrementalTest {
     private String runScript(String script, String fileName) {
         Scriptable scope = new NativeObject();
         scope.setParentScope(rhinoRootScope);
+        scope.setPrototype(rhinoRootScope);
         rhinoContext.evaluateString(scope, script, fileName, 1, null);
         Function main = (Function) scope.get("main", scope);
         ScriptRuntime.doTopCall(main, rhinoContext, scope, scope,