Index: doc/papers/general/Paper.tex
===================================================================
--- doc/papers/general/Paper.tex	(revision 7ad6b6db8814dd8a1b75e812dfcb238f7ca69251)
+++ doc/papers/general/Paper.tex	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -61,4 +61,12 @@
 \newcommand{\C}[2][\@empty]{\ifx#1\@empty\else\global\setlength{\columnposn}{#1}\global\columnposn=\columnposn\fi\hfill\makebox[\textwidth-\columnposn][l]{\lst@basicstyle{\LstCommentStyle{#2}}}}
 \newcommand{\CRT}{\global\columnposn=\gcolumnposn}
+
+% Denote newterms in particular font and index them without particular font and in lowercase, e.g., \newterm{abc}.
+% The option parameter provides an index term different from the new term, e.g., \newterm[\texttt{abc}]{abc}
+% The star version does not lowercase the index information, e.g., \newterm*{IBM}.
+\newcommand{\newtermFontInline}{\emph}
+\newcommand{\newterm}{\@ifstar\@snewterm\@newterm}
+\newcommand{\@newterm}[2][\@empty]{\lowercase{\def\temp{#2}}{\newtermFontInline{#2}}\ifx#1\@empty\index{\temp}\else\index{#1@{\protect#2}}\fi}
+\newcommand{\@snewterm}[2][\@empty]{{\newtermFontInline{#2}}\ifx#1\@empty\index{#2}\else\index{#1@{\protect#2}}\fi}
 
 % Latin abbreviation
@@ -1040,48 +1048,70 @@
 \TODO{choose and fallthrough here as well?}
 
+
 \subsection{\texorpdfstring{\LstKeywordStyle{with} Clause / Statement}{with Clause / Statement}}
 \label{s:WithClauseStatement}
 
-In any programming language, some functions have a naturally close relationship with a particular data type. 
-Object-oriented programming allows this close relationship to be codified in the language by making such functions \emph{class methods} of their related data type.
-Class methods have certain privileges with respect to their associated data type, notably un-prefixed access to the fields of that data type. 
-When writing C functions in an object-oriented style, this un-prefixed access is swiftly missed, as access to fields of a @Foo* f@ requires an extra three characters @f->@ every time, which disrupts coding flow and clutters the produced code. 
-
-\TODO{Fill out section. Be sure to mention arbitrary expressions in with-blocks, recent change driven by Thierry to prioritize field name over parameters.}
-
-
-In object-oriented programming, there is an implicit first parameter, often names @self@ or @this@, which is elided.
+Grouping heterogenous data into \newterm{aggregate}s is a common programming practice, and an aggregate can be further organized into more complex structures, such as arrays and containers:
+\begin{cfa}
+struct S {								$\C{// aggregate}$
+	char c;								$\C{// fields}$
+	int i;
+	double d;
+};
+S s, as[10];
+\end{cfa}
+However, routines manipulating aggregates have repeition of the aggregate name to access its containing fields:
+\begin{cfa}
+void f( S s ) {
+	`s.`c; `s.`i; `s.`d;				$\C{// access containing fields}$
+}
+\end{cfa}
+A similar situation occurs in object-oriented programming, \eg \CC:
 \begin{C++}
 class C {
-	int i, j;
-	int mem() {					$\C{\color{red}// implicit "this" parameter}$
-		i = 1;					$\C{\color{red}// this-{\textgreater}i}$
-		j = 2;					$\C{\color{red}// this-{\textgreater}j}$
+	char c;								$\C{// fields}$
+	int i;
+	double d;
+	int mem() {							$\C{// implicit "this" parameter}$
+		`this->`c; `this->`i; `this->`d;$\C{// access containing fields}$
 	}
 }
 \end{C++}
-Since \CFA is non-object-oriented, the equivalent object-oriented program looks like:
+Nesting of member routines in a \lstinline[language=C++]@class@ allows eliding \lstinline[language=C++]@this->@ because of nested lexical-scoping.
+
+% In object-oriented programming, there is an implicit first parameter, often names @self@ or @this@, which is elided.
+% In any programming language, some functions have a naturally close relationship with a particular data type. 
+% Object-oriented programming allows this close relationship to be codified in the language by making such functions \emph{class methods} of their related data type.
+% Class methods have certain privileges with respect to their associated data type, notably un-prefixed access to the fields of that data type. 
+% When writing C functions in an object-oriented style, this un-prefixed access is swiftly missed, as access to fields of a @Foo* f@ requires an extra three characters @f->@ every time, which disrupts coding flow and clutters the produced code. 
+% 
+% \TODO{Fill out section. Be sure to mention arbitrary expressions in with-blocks, recent change driven by Thierry to prioritize field name over parameters.}
+
+\CFA provides a @with@ clause/statement (see Pascal~\cite[\S~4.F]{Pascal}) to elided aggregate qualification to fields by opening a scope containing field identifiers.
+Hence, the qualified fields become variables, and making it easier to optimizing field references in a block.
 \begin{cfa}
-struct S { int i, j; };
-int mem( S & `this` ) {			$\C{// explicit "this" parameter}$
-	`this.`i = 1;				$\C{// "this" is not elided}$
-	`this.`j = 2;
+void f( S s ) `with s` {				$\C{// with clause}$
+	c; i; d;							$\C{\color{red}// s.c, s.i, s.d}$
 }
 \end{cfa}
-but it is cumbersome having to write "this." many times in a member.
-
-\CFA provides a @with@ clause/statement (see Pascal~\cite[\S~4.F]{Pascal}) to elided the "@this.@" by opening a scope containing field identifiers, changing the qualified fields into variables and giving an opportunity for optimizing qualified references.
+and the equivalence for object-style programming is:
 \begin{cfa}
-int mem( S &this ) `with this` { $\C{// with clause}$
-	i = 1;						$\C{\color{red}// this.i}$
-	j = 2;						$\C{\color{red}// this.j}$
+int mem( S & this ) `with this` {		$\C{// with clause}$
+	c; i; d;							$\C{\color{red}// this.c, this.i, this.d}$
 }
 \end{cfa}
-which extends to multiple routine parameters:
+The key generality over the object-oriented approach is that one aggregate parameter \lstinline[language=C++]@this@ is not treated specially over other aggregate parameters:
 \begin{cfa}
 struct T { double m, n; };
-int mem2( S & this1, T & this2 ) `with this1, this2` {
-	i = 1; j = 2;
-	m = 1.0; n = 2.0;
+int mem( S & s, T & t ) `with s, t` {	$\C{// multiple aggregate parameters}$
+	c; i; d;							$\C{\color{red}// s.c, s.i, s.d}$
+	m; n;								$\C{\color{red}// t.m, t.n}$
+}
+\end{cfa}
+The equivalent object-oriented style is:
+\begin{cfa}
+int S::mem( T & t ) {					$\C{// multiple aggregate parameters}$
+	c; i; d;							$\C{\color{red}// this-\textgreater.c, this-\textgreater.i, this-\textgreater.d}$
+	`t.`m; `t.`n;
 }
 \end{cfa}
@@ -1092,7 +1122,7 @@
 	struct S1 { ... } s1;
 	struct S2 { ... } s2;
-	`with s1` {					$\C{// with statement}$
+	`with s1` {						$\C{// with statement}$
 		// access fields of s1 without qualification
-		`with s2` {				$\C{// nesting}$
+		`with s2` {					$\C{// nesting}$
 			// access fields of s1 and s2 without qualification
 		}
@@ -1110,13 +1140,13 @@
 struct T { int i; int k; int m } b, c;
 `with a, b` {
-	j + k;						$\C{// unambiguous, unique names define unique types}$
-	i;							$\C{// ambiguous, same name and type}$
-	a.i + b.i;					$\C{// unambiguous, qualification defines unique names}$
-	m;							$\C{// ambiguous, same name and no context to define unique type}$
-	m = 5.0;					$\C{// unambiguous, same name and context defines unique type}$
-	m = 1;						$\C{// unambiguous, same name and context defines unique type}$
-}
-`with c` { ... }				$\C{// ambiguous, same name and no context}$
-`with (S)c` { ... }				$\C{// unambiguous, same name and cast defines unique type}$
+	j + k;							$\C{// unambiguous, unique names define unique types}$
+	i;								$\C{// ambiguous, same name and type}$
+	a.i + b.i;						$\C{// unambiguous, qualification defines unique names}$
+	m;								$\C{// ambiguous, same name and no context to define unique type}$
+	m = 5.0;						$\C{// unambiguous, same name and context defines unique type}$
+	m = 1;							$\C{// unambiguous, same name and context defines unique type}$
+}
+`with c` { ... }					$\C{// ambiguous, same name and no context}$
+`with (S)c` { ... }					$\C{// unambiguous, same name and cast defines unique type}$
 \end{cfa}
 
@@ -1234,4 +1264,5 @@
 \TODO{finish reference conversions; look at user manual}
 
+
 \subsection{Constructors and Destructors}
 
@@ -1252,4 +1283,5 @@
 
 \TODO{Some text already at the end of Section~\ref{sec:poly-fns}}
+
 
 \subsection{Units}
Index: src/driver/cfa.cc
===================================================================
--- src/driver/cfa.cc	(revision 7ad6b6db8814dd8a1b75e812dfcb238f7ca69251)
+++ src/driver/cfa.cc	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -10,6 +10,6 @@
 // Created On       : Tue Aug 20 13:44:49 2002
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Thu Feb  1 22:26:10 2018
-// Update Count     : 163
+// Last Modified On : Mon Feb  5 22:05:28 2018
+// Update Count     : 166
 //
 
@@ -258,4 +258,13 @@
 		#endif
 
+		args[nargs] = "-Xlinker";
+		nargs += 1;
+		args[nargs] = "--undefined=__cfaabi_dbg_bits_write";
+		nargs += 1;
+		args[nargs] = "-Xlinker";
+		nargs += 1;
+		args[nargs] = "--undefined=__cfaabi_interpose_startup";
+		nargs += 1;
+
 		// include the cfa library in case it's needed
 		args[nargs] = "-L" CFA_LIBDIR;
@@ -273,15 +282,6 @@
 		args[nargs] = "-lrt";
 		nargs += 1;
-		args[nargs] = "-Xlinker";
-		nargs += 1;
-		args[nargs] = "--undefined=__cfaabi_dbg_bits_write";
-		nargs += 1;
-		args[nargs] = "-Xlinker";
-		nargs += 1;
-		args[nargs] = "--undefined=__cfaabi_interpose_startup";
-		nargs += 1;
-
-	} // if
-#endif //HAVE_LIBCFA
+	} // if
+#endif // HAVE_LIBCFA
 
 	// Add exception flags (unconditionally)
@@ -333,4 +333,9 @@
 		nargs += 1;
 	} // if
+
+    args[nargs] = "-Xlinker";							// used by backtrace
+    nargs += 1;
+    args[nargs] = "-export-dynamic";
+    nargs += 1;
 
 	// execute the compilation command
Index: src/libcfa/concurrency/invoke.h
===================================================================
--- src/libcfa/concurrency/invoke.h	(revision 7ad6b6db8814dd8a1b75e812dfcb238f7ca69251)
+++ src/libcfa/concurrency/invoke.h	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -121,4 +121,7 @@
 		// coroutine body used to store context
 		struct coroutine_desc  self_cor;
+
+		// current active context
+		struct coroutine_desc * curr_cor;
 
 		// monitor body used for mutual exclusion
Index: src/libcfa/concurrency/kernel.c
===================================================================
--- src/libcfa/concurrency/kernel.c	(revision 7ad6b6db8814dd8a1b75e812dfcb238f7ca69251)
+++ src/libcfa/concurrency/kernel.c	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -108,4 +108,16 @@
 void ?{}( thread_desc & this, current_stack_info_t * info) with( this ) {
 	self_cor{ info };
+	curr_cor = &self_cor;
+	self_mon.owner = &this;
+	self_mon.recursion = 1;
+	self_mon_p = &self_mon;
+	next = NULL;
+	__cfaabi_dbg_debug_do(
+		dbg_next = NULL;
+		dbg_prev = NULL;
+		__cfaabi_dbg_thread_register(&this);
+	)
+
+	monitors{ &self_mon_p, 1, (fptr_t)0 };
 }
 
@@ -225,6 +237,7 @@
 // from the processor coroutine to the target thread
 void runThread(processor * this, thread_desc * dst) {
+	assert(dst->curr_cor);
 	coroutine_desc * proc_cor = get_coroutine(*this->runner);
-	coroutine_desc * thrd_cor = get_coroutine(dst);
+	coroutine_desc * thrd_cor = dst->curr_cor;
 
 	//Reset the terminating actions here
@@ -237,4 +250,10 @@
 	ThreadCtxSwitch(proc_cor, thrd_cor);
 	// when ThreadCtxSwitch returns we are back in the processor coroutine
+}
+
+void returnToKernel() {
+	coroutine_desc * proc_cor = get_coroutine(*this_processor->runner);
+	coroutine_desc * thrd_cor = this_thread->curr_cor = this_coroutine;
+	ThreadCtxSwitch(thrd_cor, proc_cor);
 }
 
@@ -360,5 +379,5 @@
 	disable_interrupts();
 	verify( !preemption_enabled );
-	suspend();
+	returnToKernel();
 	verify( !preemption_enabled );
 	enable_interrupts( __cfaabi_dbg_ctx );
@@ -371,5 +390,5 @@
 
 	verify( !preemption_enabled );
-	suspend();
+	returnToKernel();
 	verify( !preemption_enabled );
 
@@ -383,5 +402,5 @@
 
 	verify( !preemption_enabled );
-	suspend();
+	returnToKernel();
 	verify( !preemption_enabled );
 
@@ -397,5 +416,5 @@
 
 	verify( !preemption_enabled );
-	suspend();
+	returnToKernel();
 	verify( !preemption_enabled );
 
@@ -410,5 +429,5 @@
 
 	verify( !preemption_enabled );
-	suspend();
+	returnToKernel();
 	verify( !preemption_enabled );
 
@@ -425,5 +444,5 @@
 
 	verify( !preemption_enabled );
-	suspend();
+	returnToKernel();
 	verify( !preemption_enabled );
 
@@ -437,5 +456,5 @@
 	this_processor->finish.thrd        = thrd;
 
-	suspend();
+	returnToKernel();
 }
 
@@ -502,5 +521,5 @@
 	// which is currently here
 	mainProcessor->do_terminate = true;
-	suspend();
+	returnToKernel();
 
 	// THE SYSTEM IS NOW COMPLETELY STOPPED
Index: src/libcfa/concurrency/thread.c
===================================================================
--- src/libcfa/concurrency/thread.c	(revision 7ad6b6db8814dd8a1b75e812dfcb238f7ca69251)
+++ src/libcfa/concurrency/thread.c	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -34,4 +34,5 @@
 	self_cor{};
 	self_cor.name = "Anonymous Coroutine";
+	curr_cor = &self_cor;
 	self_mon.owner = &this;
 	self_mon.recursion = 1;
@@ -104,7 +105,4 @@
 	dst->state = Active;
 
-	//update the last resumer
-	dst->last = src;
-
 	// set new coroutine that the processor is executing
 	// and context switch to it
Index: src/libcfa/interpose.c
===================================================================
--- src/libcfa/interpose.c	(revision 7ad6b6db8814dd8a1b75e812dfcb238f7ca69251)
+++ src/libcfa/interpose.c	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -10,6 +10,6 @@
 // Created On       : Wed Mar 29 16:10:31 2017
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Fri Jul 21 22:27:33 2017
-// Update Count     : 1
+// Last Modified On : Mon Feb  5 23:40:04 2018
+// Update Count     : 17
 //
 
@@ -32,6 +32,4 @@
 #include "bits/signal.h"
 #include "startup.h"
-
-void __cfaabi_interpose_startup(void)  __attribute__(( constructor( STARTUP_PRIORITY_CORE ) ));
 
 typedef void (*generic_fptr_t)(void);
@@ -92,13 +90,16 @@
 void sigHandler_abort( __CFA_SIGPARMS__ );
 
-void __cfaabi_interpose_startup() {
-	const char *version = NULL;
-
-	INIT_REALRTN( abort, version );
-	INIT_REALRTN( exit, version );
-
-	__kernel_sigaction( SIGSEGV, sigHandler_segv , SA_SIGINFO );      // Failure handler
-	__kernel_sigaction( SIGBUS , sigHandler_segv , SA_SIGINFO );      // Failure handler
-	__kernel_sigaction( SIGABRT, sigHandler_abort, SA_SIGINFO );      // Failure handler
+extern "C" {
+	void __cfaabi_interpose_startup(void)  __attribute__(( constructor( STARTUP_PRIORITY_CORE ) ));
+	void __cfaabi_interpose_startup( void ) {
+		const char *version = NULL;
+
+		INIT_REALRTN( abort, version );
+		INIT_REALRTN( exit, version );
+
+		__kernel_sigaction( SIGSEGV, sigHandler_segv , SA_SIGINFO ); // Failure handler
+		__kernel_sigaction( SIGBUS , sigHandler_segv , SA_SIGINFO ); // Failure handler
+		__kernel_sigaction( SIGABRT, sigHandler_abort, SA_SIGINFO ); // Failure handler
+	}
 }
 
@@ -108,9 +109,9 @@
 
 extern "C" {
-	void abort (void) __attribute__ ((__nothrow__, __leaf__, __noreturn__)) {
+	void abort( void ) __attribute__ ((__nothrow__, __leaf__, __noreturn__)) {
 		abortf( NULL );
 	}
 
-	void exit (int __status) __attribute__ ((__nothrow__, __leaf__, __noreturn__)) {
+	void exit( int __status ) __attribute__ ((__nothrow__, __leaf__, __noreturn__)) {
 		libc_exit(__status);
 	}
@@ -121,6 +122,6 @@
 }
 
-void * kernel_abort    (void) __attribute__ ((__nothrow__, __leaf__, __weak__)) { return NULL; }
-void   kernel_abort_msg(void * data, char * buffer, int size) __attribute__ ((__nothrow__, __leaf__, __weak__)) {}
+void * kernel_abort    ( void ) __attribute__ ((__nothrow__, __leaf__, __weak__)) { return NULL; }
+void   kernel_abort_msg( void * data, char * buffer, int size ) __attribute__ ((__nothrow__, __leaf__, __weak__)) {}
 
 enum { abort_text_size = 1024 };
@@ -133,5 +134,5 @@
 		int len;
 
-		if( fmt ) {
+		if ( fmt ) {
 			va_list args;
 			va_start( args, fmt );
@@ -142,5 +143,5 @@
 
 			__cfaabi_dbg_bits_write( abort_text, len );
-			__cfaabi_dbg_bits_write( "\n", 1 );
+			//__cfaabi_dbg_bits_write( "\n", 1 );
 		}
 
@@ -162,5 +163,5 @@
 	enum { Frames = 50 };
 	void * array[Frames];
-	int size = backtrace( array, Frames );
+	size_t size = backtrace( array, Frames );
 	char ** messages = backtrace_symbols( array, size );
 
@@ -176,4 +177,5 @@
 
 		for ( char *p = messages[i]; *p; ++p ) {
+			//__cfaabi_dbg_bits_print_nolock( "X %s\n", p);
 			// find parantheses and +offset
 			if ( *p == '(' ) {
Index: src/tests/concurrent/.expect/coroutineYield.txt
===================================================================
--- src/tests/concurrent/.expect/coroutineYield.txt	(revision 69ce455c8f5e27f50d588032a450598affde369b)
+++ src/tests/concurrent/.expect/coroutineYield.txt	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -0,0 +1,4000 @@
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
+Coroutine 1
+Coroutine 2
+Thread 2
+Thread 1
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Index: src/tests/concurrent/coroutineYield.c
===================================================================
--- src/tests/concurrent/coroutineYield.c	(revision 69ce455c8f5e27f50d588032a450598affde369b)
+++ src/tests/concurrent/coroutineYield.c	(revision 69ce455c8f5e27f50d588032a450598affde369b)
@@ -0,0 +1,26 @@
+#include <fstream>
+#include <kernel>
+#include <stdlib>
+#include <thread>
+
+coroutine Coroutine {};
+
+void main(Coroutine& this) {
+	while(true) {
+		sout | "Coroutine 1" | endl;
+		yield();
+		sout | "Coroutine 2" | endl;
+		suspend();
+	}
+}
+
+
+int main(int argc, char* argv[]) {
+	Coroutine c;
+	for(int i = 0; i < 1_000; i++) {
+		sout | "Thread 1" | endl;
+		resume(c);
+		sout | "Thread 2" | endl;
+		yield();
+	}
+}
